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Van Overwalle J, Van der Donck S, Van de Cruys S, Boets B, Wagemans J. Assessing Spontaneous Categorical Processing of Visual Shapes via Frequency-Tagging EEG. J Neurosci 2024; 44:e1346232024. [PMID: 38423762 PMCID: PMC11026363 DOI: 10.1523/jneurosci.1346-23.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 01/25/2024] [Accepted: 02/20/2024] [Indexed: 03/02/2024] Open
Abstract
Categorization is an essential cognitive and perceptual process, which happens spontaneously. However, earlier research often neglected the spontaneous nature of this process by mainly adopting explicit tasks in behavioral or neuroimaging paradigms. Here, we use frequency-tagging (FT) during electroencephalography (EEG) in 22 healthy human participants (both male and female) as a direct approach to pinpoint spontaneous visual categorical processing. Starting from schematic natural visual stimuli, we created morph sequences comprising 11 equal steps. Mirroring a behavioral categorical perception discrimination paradigm, we administered a FT-EEG oddball paradigm, assessing neural sensitivity for equally sized differences within and between stimulus categories. Likewise, mirroring a behavioral category classification paradigm, we administered a sweep FT-EEG oddball paradigm, sweeping from one end of the morph sequence to the other, thereby allowing us to objectively pinpoint the neural category boundary. We found that FT-EEG can implicitly measure categorical processing and discrimination. More specifically, we could derive an objective neural index of the required level to differentiate between the two categories, and this neural index showed the typical marker of categorical perception (i.e., stronger discrimination across as compared with within categories). The neural findings of the implicit paradigms were also validated using an explicit behavioral task. These results provide evidence that FT-EEG can be used as an objective tool to measure discrimination and categorization and that the human brain inherently and spontaneously (without any conscious or decisional processes) uses higher-level meaningful categorization information to interpret ambiguous (morph) shapes.
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Affiliation(s)
- Jaana Van Overwalle
- Department of Brain and Cognition, Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium
| | - Sander Van de Cruys
- Department of Brain and Cognition, Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium
| | - Johan Wagemans
- Department of Brain and Cognition, Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium
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Tomescu MI, Van der Donck S, Perisanu EM, Berceanu AI, Alaerts K, Boets B, Carcea I. Social functioning predicts individual changes in EEG microstates following intranasal oxytocin administration: A double-blind, cross-over randomized clinical trial. Psychophysiology 2024:e14581. [PMID: 38594888 DOI: 10.1111/psyp.14581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 04/11/2024]
Abstract
Oxytocin (OXT) modulates social behaviors. However, the administration of exogenous OXT in humans produces inconsistent behavioral changes, affecting future consideration of OXT as a treatment for autism and other disorders with social symptoms. Inter-individual variability in social functioning traits might play a key role in how OXT changes brain activity and, therefore, behavior. Here, we investigated if inter-individual variability might dictate how single-dose intranasal OXT administration (IN-OXT) changes spontaneous neural activity during the eyes-open resting state. We used a double-blinded, randomized, placebo-controlled, cross-over design on 30 typically developing young adult men to investigate the dynamics of EEG microstates corresponding to activity in defined neural networks. We confirmed previous reports that, at the group level, IN-OXT increases the representation of the attention and salience microstates. Furthermore, we identified a decreased representation of microstates associated with the default mode network. Using multivariate partial least square statistical analysis, we found that social functioning traits associated with IN-OXT-induced changes in microstate dynamics in specific spectral bands. Correlation analysis further revealed that the higher the social functioning, the more IN-OXT increased the appearance of the visual network-associated microstate, and suppressed the appearance of a default mode network-related microstate. The lower the social functioning, the more IN-OXT increases the appearance of the salience microstate. The effects we report on the salience microstate support the hypothesis that OXT regulates behavior by enhancing social salience. Moreover, our findings indicate that social functioning traits modulate responses to IN-OXT and could partially explain the inconsistent reports on IN-OXT effects.
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Affiliation(s)
- Miralena I Tomescu
- Faculty of Educational Sciences, Department of Psychology, University "Stefan cel Mare" of Suceava, Bucharest, Romania
- CINETic Center, National University of Theatre and Film "I.L. Caragiale" Bucharest, Bucharest, Romania
- Faculty of Psychology and Educational Sciences, Department of Psychology, University of Bucharest, Bucharest, Romania
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Emanuela M Perisanu
- Institute of Cardiovascular Diseases, Timisoara, Romania
- Faculty of Medicine, University of Sibiu, Sibiu, Romania
| | - Alexandru I Berceanu
- CINETic Center, National University of Theatre and Film "I.L. Caragiale" Bucharest, Bucharest, Romania
| | - Kaat Alaerts
- Neuromodulation Laboratory, Research Group for Neurorehabilitation, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Ioana Carcea
- CINETic Center, National University of Theatre and Film "I.L. Caragiale" Bucharest, Bucharest, Romania
- Department of Pharmacology, Physiology, and Neuroscience, Rutgers Brain Health Institute, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
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Alaerts K, Moerkerke M, Daniels N, Zhang Q, Grazia R, Steyaert J, Prinsen J, Boets B. Chronic oxytocin improves neural decoupling at rest in children with autism: an exploratory RCT. J Child Psychol Psychiatry 2024. [PMID: 38400592 DOI: 10.1111/jcpp.13966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/17/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND Shifts in peak frequencies of oscillatory neural rhythms are put forward as a principal mechanism by which cross-frequency coupling/decoupling is implemented in the brain. During active neural processing, functional integration is facilitated through transitory formations of "harmonic" cross-frequency couplings, whereas "nonharmonic" decoupling among neural oscillatory rhythms is postulated to characterize the resting, default state of the brain, minimizing the occurrence of spurious, noisy, background couplings. METHODS Within this exploratory, randomized, placebo-controlled trial, we assessed whether the transient occurrence of nonharmonic and harmonic relationships between peak-frequencies in the alpha (8-14 Hz) and theta (4-8 Hz) bands is impacted by intranasal administration of oxytocin, a neuromodulator implicated in improving homeostasis and reducing stress/anxiety. To do so, resting-state electroencephalography was acquired before and after 4 weeks of oxytocin administration (12 IU twice-daily) in children with autism spectrum disorder (8-12 years, n = 33 oxytocin; n = 34 placebo). At the baseline, neural assessments of children with autism were compared with those of a matched cohort of children without autism (n = 40). RESULTS Compared to nonautistic peers, autistic children displayed a lower incidence of nonharmonic alpha-theta cross-frequency decoupling, indicating a higher incidence of spurious "noisy" coupling in their resting brain (p = .001). Dimensionally, increased neural coupling was associated with more social difficulties (p = .002) and lower activity of the parasympathetic "rest & digest" branch of the autonomic nervous system (p = .018), indexed with high-frequency heart-rate-variability. Notably, after oxytocin administration, the transient formation of nonharmonic cross-frequency configurations was increased in the cohort of autistic children (p < .001), indicating a beneficial effect of oxytocin on reducing spurious cross-frequency-interactions. Furthermore, parallel epigenetics changes of the oxytocin receptor gene indicated that the neural effects were likely mediated by changes in endogenous oxytocinergic signaling (p = .006). CONCLUSIONS Chronic oxytocin induced important homeostatic changes in the resting-state intrinsic neural frequency architecture, reflective of reduced noisy oscillatory couplings and improved signal-to-noise properties.
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Affiliation(s)
- Kaat Alaerts
- Research Group for Neurorehabilitation, Neuromodulation Laboratory, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Matthijs Moerkerke
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium
| | - Nicky Daniels
- Research Group for Neurorehabilitation, Neuromodulation Laboratory, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Qianqian Zhang
- Research Group for Neurorehabilitation, Neuromodulation Laboratory, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Ricchiuti Grazia
- Research Group for Neurorehabilitation, Neuromodulation Laboratory, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Jellina Prinsen
- Research Group for Neurorehabilitation, Neuromodulation Laboratory, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bart Boets
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium
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Deferm W, Tang T, Moerkerke M, Daniels N, Steyaert J, Alaerts K, Ortibus E, Naulaers G, Boets B. Subtle microstructural alterations in white matter tracts involved in socio-emotional processing after very preterm birth. Neuroimage Clin 2024; 41:103580. [PMID: 38401459 PMCID: PMC10944182 DOI: 10.1016/j.nicl.2024.103580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/10/2024] [Accepted: 02/10/2024] [Indexed: 02/26/2024]
Abstract
Children born very preterm (VPT, < 32 weeks of gestation) have an increased risk of developing socio-emotional difficulties. Possible neural substrates for these socio-emotional difficulties are alterations in the structural connectivity of the social brain due to premature birth. The objective of the current study was to study microstructural white matter integrity in VPT versus full-term (FT) born school-aged children along twelve white matter tracts involved in socio-emotional processing. Diffusion MRI scans were obtained from a sample of 35 VPT and 38 FT 8-to-12-year-old children. Tractography was performed using TractSeg, a state-of-the-art neural network-based approach, which offers investigation of detailed tract profiles of fractional anisotropy (FA). Group differences in FA along the tracts were investigated using both a traditional and complementary functional data analysis approach. Exploratory correlations were performed between the Social Responsiveness Scale (SRS-2), a parent-report questionnaire assessing difficulties in social functioning, and FA along the tract. Both analyses showed significant reductions in FA for the VPT group along the middle portion of the right SLF I and an anterior portion of the left SLF II. These group differences possibly indicate altered white matter maturation due to premature birth and may contribute to altered functional connectivity in the Theory of Mind network which has been documented in earlier work with VPT samples. Apart from reduced social motivation in the VPT group, there were no significant group differences in reported social functioning, as assessed by SRS-2. We found that in the VPT group higher FA values in segments of the left SLF I and right SLF II were associated with better social functioning. Surprisingly, the opposite was found for segments in the right IFO, where higher FA values were associated with worse reported social functioning. Since no significant correlations were found for the FT group, this relationship may be specific for VPT children. The current study overcomes methodological limitations of previous studies by more accurately segmenting white matter tracts using constrained spherical deconvolution based tractography, by applying complementary tractometry analysis approaches to estimate changes in FA more accurately, and by investigating the FA profile along the three components of the SLF.
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Affiliation(s)
- Ward Deferm
- Center for Developmental Psychiatry, KU Leuven, Belgium.
| | - Tiffany Tang
- Center for Developmental Psychiatry, KU Leuven, Belgium
| | | | - Nicky Daniels
- Neuromotor Rehabilitation Research Group, KU Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, KU Leuven, Belgium; Child Psychiatry, UZ Leuven, Belgium
| | - Kaat Alaerts
- Neuromotor Rehabilitation Research Group, KU Leuven, Belgium
| | | | - Gunnar Naulaers
- Neonatal Intensive Care Unit - Neonatology, UZ Leuven, Belgium; UZ Leuven & Center for Developmental Disorders, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, KU Leuven, Belgium
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Van den Brande A, Bollen B, Boets B, Naulaers G, Ortibus E. Executive Function Assessment in 2-Year-Olds Born Preterm. Neuropediatrics 2024; 55:16-22. [PMID: 36720262 DOI: 10.1055/a-2023-9280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Our objective was to investigate the executive function and its relationship with gestational age, sex, maternal education, and neurodevelopmental outcome at 2 years corrected age in children born preterm. METHOD Executive function was assessed by means of the Multisearch Multilocation Task (MSML), Reversed Categorization Task (RevCat), and Snack Delay Task (SDT). Infant and maternal characteristics were gathered from the child's record. The developmental outcome was measured by the Bayley Scales and a multidisciplinary risk evaluation for autism. RESULTS The executive function battery was completed by 97 children. The majority were able to successfully complete the MSML and SDT but failed RevCat. The lower the gestational age and the maternal education, the lower the executive function scores. Better cognition and motor function, as well as low autism risk, were associated with better executive function scores. Executive function was not related to sex. INTERPRETATION This cohort study provides evidence that it is feasible to assess executive function in 2-year-olds born preterm. Executive function is related to gestational age and maternal education and is positively correlated with behavioral outcome. Therefore, executive functions can be a valuable target for early intervention, resulting in improvements in neurodevelopmental outcomes in children born preterm.
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Affiliation(s)
- Astrid Van den Brande
- Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Bieke Bollen
- Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Leuven Autism Research consortium, KU Leuven, Leuven, Belgium
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Gunnar Naulaers
- Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Els Ortibus
- Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium
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Moerkerke M, Daniels N, Tibermont L, Tang T, Evenepoel M, Van der Donck S, Debbaut E, Prinsen J, Chubar V, Claes S, Vanaudenaerde B, Willems L, Steyaert J, Boets B, Alaerts K. Chronic oxytocin administration stimulates the oxytocinergic system in children with autism. Nat Commun 2024; 15:58. [PMID: 38167302 PMCID: PMC10762037 DOI: 10.1038/s41467-023-44334-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 12/08/2023] [Indexed: 01/05/2024] Open
Abstract
Clinical efficacy of intranasal administration of oxytocin is increasingly explored in autism spectrum disorder, but to date, the biological effects of chronic administration regimes on endogenous oxytocinergic function are largely unknown. Here exploratory biological assessments from a completed randomized, placebo-controlled trial showed that children with autism (n = 79, 16 females) receiving intranasal oxytocin for four weeks (12 IU, twice daily) displayed significantly higher salivary oxytocin levels 24 hours after the last oxytocin nasal spray administration, but no longer at a four-week follow up session. Regarding salivary oxytocin receptor gene (OXTR) epigenetics (DNA-methylation), oxytocin-induced reductions in OXTR DNA-methylation were observed, suggesting a facilitation of oxytocin receptor expression in the oxytocin compared to the placebo group. Notably, heightened oxytocin levels post-treatment were significantly associated with reduced OXTR DNA-methylation and improved feelings of secure attachment. These findings indicate that four weeks of chronic oxytocin administration stimulated the endogenous oxytocinergic system in children with autism.
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Affiliation(s)
- Matthijs Moerkerke
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Nicky Daniels
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Laura Tibermont
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Tiffany Tang
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Margaux Evenepoel
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Edward Debbaut
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Jellina Prinsen
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | | | - Stephan Claes
- University Psychiatric Centre, KU Leuven, Leuven, Belgium
| | - Bart Vanaudenaerde
- Laboratory of Respiratory Diseases and Thoracic Surgery, Department of Chronic Illness and Metabolism, KU Leuven, Leuven, Belgium
| | - Lynn Willems
- Laboratory of Respiratory Diseases and Thoracic Surgery, Department of Chronic Illness and Metabolism, KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Kaat Alaerts
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium.
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Qiao Z, Lafit G, Lecei A, Achterhof R, Kirtley OJ, Hiekkaranta AP, Hagemann N, Hermans KSFM, Boets B, Reininghaus U, Myin-Germeys I, van Winkel R. Childhood Adversity and Emerging Psychotic Experiences: A Network Perspective. Schizophr Bull 2024; 50:47-58. [PMID: 37318106 PMCID: PMC10754171 DOI: 10.1093/schbul/sbad079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
BACKGROUND AND HYPOTHESIS Childhood adversity is associated with a myriad of psychiatric symptoms, including psychotic experiences (PEs), and with multiple psychological processes that may all mediate these associations. STUDY DESIGN Using a network approach, the present study examined the complex interactions between childhood adversity, PEs, other psychiatric symptoms, and multiple psychological mediators (ie, activity-related and social stress, negative affect, loneliness, threat anticipation, maladaptive cognitive emotion regulation, attachment insecurity) in a general population, adolescent sample (n = 865, age 12-20, 67% female). STUDY RESULTS Centrality analyses revealed a pivotal role of depression, anxiety, negative affect, and loneliness within the network and a bridging role of threat anticipation between childhood adversity and maladaptive cognitive emotion regulation. By constructing shortest path networks, we found multiple existing paths between different categories of childhood adversity and PEs, with symptoms of general psychopathology (ie, anxiety, hostility, and somatization) as the main connective component. Sensitivity analyses confirmed the robustness and stability of the networks. Longitudinal analysis in a subsample with Wave 2 data (n = 161) further found that variables with higher centrality (ie, depression, negative affect, and loneliness) better predicted follow-up PEs. CONCLUSIONS Pathways linking childhood adversity to PEs are complex, with multifaceted psychological and symptom-symptom interactions. They underscore the transdiagnostic, heterotypic nature of mental ill-health in young people experiencing PEs, in agreement with current clinical recommendations.
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Affiliation(s)
- Zhiling Qiao
- Department of Neurosciences, Research Group Psychiatry, Center for Clinical Psychiatry, KU Leuven, Leuven, Belgium
| | - Ginette Lafit
- Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, KU Leuven, Leuven, Belgium
- Department of Psychology, Group on Quantitative Psychology and Individual Differences, KU Leuven, Leuven, Belgium
| | - Aleksandra Lecei
- Department of Neurosciences, Research Group Psychiatry, Center for Clinical Psychiatry, KU Leuven, Leuven, Belgium
| | - Robin Achterhof
- Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, KU Leuven, Leuven, Belgium
| | - Olivia J Kirtley
- Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, KU Leuven, Leuven, Belgium
| | - Anu P Hiekkaranta
- Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, KU Leuven, Leuven, Belgium
| | - Noëmi Hagemann
- Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, KU Leuven, Leuven, Belgium
| | - Karlijn S F M Hermans
- Strategy and Academic Affairs, Administration and Central Services, Leiden University, Leiden, The Netherlands
| | - Bart Boets
- Department of Neurosciences, Research Group Psychiatry, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium
| | - Ulrich Reininghaus
- Department of Public Mental Health, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Baden-Württemberg, Germany
- ESRC Centre for Society and Mental Health and Social Epidemiology Research Group, King’s College London, London, UK
| | - Inez Myin-Germeys
- Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, KU Leuven, Leuven, Belgium
| | - Ruud van Winkel
- Department of Neurosciences, Research Group Psychiatry, Center for Clinical Psychiatry, KU Leuven, Leuven, Belgium
- University Psychiatric Center (UPC), KU Leuven, Leuven, Belgium
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8
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Moerkerke M, Daniels N, Van der Donck S, Tibermont L, Tang T, Debbaut E, Bamps A, Prinsen J, Steyaert J, Alaerts K, Boets B. Can repeated intranasal oxytocin administration affect reduced neural sensitivity towards expressive faces in autism? A randomized controlled trial. J Child Psychol Psychiatry 2023; 64:1583-1595. [PMID: 37278339 DOI: 10.1111/jcpp.13850] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/20/2023] [Indexed: 06/07/2023]
Abstract
BACKGROUND Autism spectrum disorder (ASD) is a neurodevelopmental condition characterized by difficulties in social communication and interaction. Crucial for efficient social interaction is the ability to quickly and accurately extract information from a person's face. Frequency-tagging electroencephalography (EEG) is a novel tool to quantify face-processing sensitivity in a robust and implicit manner. In terms of intervention approaches, intranasal administration of oxytocin (OT) is increasingly considered as a potential pharmacological approach for improving socio-communicative difficulties in ASD, through enhancing social salience and/or reducing (social) stress and anxiety. METHODS In this randomized, double-blind, placebo-controlled, mechanistic pharmaco-neuroimaging clinical trial, we implemented frequency-tagging EEG to conduct an exploratory investigation into the impact of repeated OT administration (4 weeks, 12 IU, twice daily) on neural sensitivity towards happy and fearful facial expressions in children with ASD (8-12 years old; OT: n = 29; placebo: n = 32). Neural effects were assessed at baseline, post-nasal spray (24 hr after the last nasal spray) and at a follow-up session, 4 weeks after the OT administration period. At baseline, neural assessments of children with ASD were compared with those of an age- and gender-matched cohort of neurotypical (NT) children (n = 39). RESULTS Children with ASD demonstrated reduced neural sensitivity towards expressive faces, as compared to NT children. Upon nasal spray administration, children with ASD displayed a significant increase in neural sensitivity at the post- and follow-up sessions, but only in the placebo group, likely reflecting an implicit learning effect. Strikingly, in the OT group, neural sensitivity remained unaffected from the baseline to the post-session, likely reflecting a dampening of an otherwise typically occurring implicit learning effect. CONCLUSIONS First, we validated the robustness of the frequency-tagging EEG approach to assess reduced neural sensitivity towards expressive faces in children with ASD. Furthermore, in contrast to social salience effects observed after single-dose administrations, repeated OT administration dampened typically occurring learning effects in neural sensitivity. In line with OT's social anxiolytic account, these observations possibly reflect a predominant (social) stress regulatory effect towards emotionally evocative faces after repeated OT administration.
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Affiliation(s)
- Matthijs Moerkerke
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Nicky Daniels
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Laura Tibermont
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Tiffany Tang
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Edward Debbaut
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Annelies Bamps
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Jellina Prinsen
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Kaat Alaerts
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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9
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Van der Donck S, Hendriks M, Vos S, Op de Beeck H, Boets B. Neural sensitivity to facial identity and facial expression discrimination in adults with autism. Autism Res 2023; 16:2110-2124. [PMID: 37823568 DOI: 10.1002/aur.3036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 09/15/2023] [Indexed: 10/13/2023]
Abstract
The fluent processing of faces can be challenging for autistic individuals. Here, we assessed the neural sensitivity to rapid changes in subtle facial cues in 23 autistic men and 23 age and IQ matched non-autistic (NA) controls using frequency-tagging electroencephalography (EEG). In oddball paradigms examining the automatic and implicit discrimination of facial identity and facial expression, base rate images were presented at 6 Hz, periodically interleaved every fifth image with an oddball image (i.e. 1.2 Hz oddball frequency). These distinctive frequency tags for base rate and oddball stimuli allowed direct and objective quantification of the neural discrimination responses. We found no large differences in the neural sensitivity of participants in both groups, not for facial identity discrimination, nor for facial expression discrimination. Both groups also showed a clear face-inversion effect, with reduced brain responses for inverted versus upright faces. Furthermore, sad faces generally elicited significantly lower neural amplitudes than angry, fearful and happy faces. The only minor group difference is the larger involvement of high-level right-hemisphere visual areas in NA men for facial expression processing. These findings are discussed from a developmental perspective, as they strikingly contrast with robust face processing deficits observed in autistic children using identical EEG paradigms.
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Affiliation(s)
- Stephanie Van der Donck
- Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Michelle Hendriks
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Research Unit Brain and Cognition, Leuven Brain Institute, KU Leuve, Leuven, Belgium
| | - Silke Vos
- Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Hans Op de Beeck
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Research Unit Brain and Cognition, Leuven Brain Institute, KU Leuve, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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10
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Ruiz Callejo D, Boets B. A systematic review on speech-in-noise perception in autism. Neurosci Biobehav Rev 2023; 154:105406. [PMID: 37797728 DOI: 10.1016/j.neubiorev.2023.105406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 10/07/2023]
Abstract
Individuals with autism spectrum disorder (ASD) exhibit atypical speech-in-noise (SiN) perception, but the scope of these impairments has not been clearly defined. We conducted a systematic review of the behavioural research on SiN perception in ASD, using a comprehensive search strategy across databases (Embase, Pubmed, Web of Science, APA PsycArticles, LLBA, clinicaltrials.gov and PsyArXiv). We withheld 20 studies that generally revealed intact speech perception in stationary noise, while impairments in speech discrimination were found in temporally modulated noise, concurrent speech, and audiovisual speech perception. An association with auditory temporal processing deficits, exacerbated by suboptimal language skills, is shown. Speech-in-speech perception might be further impaired due to deficient top-down processing of speech. Further research is needed to address remaining challenges and gaps in our understanding of these impairments, including the developmental aspects of SiN processing in ASD, and the impact of gender and social attentional orienting on this ability. Our findings have important implications for improving communication in ASD, both in daily interactions and in clinical and educational settings.
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Affiliation(s)
- Diego Ruiz Callejo
- University Psychiatric Center KU Leuven, Leuven, Belgium; Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium.
| | - Bart Boets
- University Psychiatric Center KU Leuven, Leuven, Belgium; Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium; Leuven Autism Research (LauRes), KU Leuven, Leuven, Belgium; Leuven Brain Institute (LBI), KU Leuven, Leuven, Belgium
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11
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Alaerts K, Daniels N, Moerkerke M, Evenepoel M, Tang T, Van der Donck S, Chubar V, Claes S, Steyaert J, Boets B, Prinsen J. At the Head and Heart of Oxytocin's Stress-Regulatory Neural and Cardiac Effects: A Chronic Administration RCT in Children with Autism. Psychother Psychosom 2023; 92:315-328. [PMID: 37820592 DOI: 10.1159/000534114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 09/10/2023] [Indexed: 10/13/2023]
Abstract
INTRODUCTION Intranasal administration of oxytocin presents a promising new approach to reduce disability associated with an autism spectrum disorder diagnosis. Previous investigations have emphasized the amygdala as the neural foundation for oxytocin's acute effects. However, to fully understand oxytocin's therapeutic potential, it is crucial to gain insight into the neuroplastic changes in amygdala circuitry induced from chronic oxytocin administrations, particularly in pediatric populations. OBJECTIVE We aimed to examine the impact of a 4-week course of intranasal oxytocin on amygdala functional connectivity in children with autism, compared to placebo. Additionally, we investigated whether oxytocin improves cardiac autonomic arousal, as indexed by high-frequency heart rate variability. METHODS Fifty-seven children with autism aged 8-12 years (45 boys, 12 girls) participated in a double-blind, randomized pharmaco-neuroimaging trial involving twice-daily administrations of intranasal oxytocin or placebo. Resting-state fMRI scans and simultaneous, in-scanner heart rate recordings were obtained before, immediately after, and 4 weeks after the nasal spray administration period. RESULTS Significant reductions in intrinsic amygdala-orbitofrontal connectivity were observed, particularly at the 4-week follow-up session. These reductions were correlated with improved social symptoms and lower cardiac autonomic arousal. Further, oxytocin's neural and cardiac autonomic effects were modulated by epigenetic modifications of the oxytocin receptor gene. The effects were more pronounced in children with reduced epigenetic methylation, signifying heightened expression of the oxytocin receptor. CONCLUSION These findings underscore that a 4-week oxytocin administration course decreases amygdala connectivity and improves cardiac autonomic balance. Epigenetic modulators may explain inter-individual variation in responses to oxytocin.
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Affiliation(s)
- Kaat Alaerts
- KU Leuven, Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, Leuven, Belgium
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
| | - Nicky Daniels
- KU Leuven, Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, Leuven, Belgium
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
| | - Matthijs Moerkerke
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Center for Developmental Psychiatry, Leuven, Belgium
| | - Margaux Evenepoel
- KU Leuven, Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, Leuven, Belgium
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
| | - Tiffany Tang
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Center for Developmental Psychiatry, Leuven, Belgium
| | - Stephanie Van der Donck
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Center for Developmental Psychiatry, Leuven, Belgium
| | | | - Stephan Claes
- KU Leuven, University Psychiatric Center, Leuven, Belgium
| | - Jean Steyaert
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
- KU Leuven, University Psychiatric Center, Leuven, Belgium
| | - Bart Boets
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Center for Developmental Psychiatry, Leuven, Belgium
| | - Jellina Prinsen
- KU Leuven, Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, Leuven, Belgium
- KU Leuven, Leuven Autism Research (LAuRes) Consortium, Leuven, Belgium
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12
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Ruiz Callejo D, Wouters J, Boets B. Speech-in-noise perception in autistic adolescents with and without early language delay. Autism Res 2023; 16:1719-1727. [PMID: 37318057 DOI: 10.1002/aur.2966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 05/30/2023] [Indexed: 06/16/2023]
Abstract
Speech-in-noise perception seems aberrant in individuals with autism spectrum disorder (ASD). Potential aggravating factors are the level of linguistic skills and impairments in auditory temporal processing. Here, we investigated autistic adolescents with and without language delay as compared to non-autistic peers, and we assessed speech perception in steady-state noise, temporally modulated noise, and concurrent speech. We found that autistic adolescents with intact language capabilities and not those with language delay performed worse than NT peers on words-in-stationary-noise perception. For the perception of sentences in stationary noise, we did not observe significant group differences, although autistic adolescents with language delay tend to perform worse in comparison to their TD peers. We also found evidence for a robust deficit in speech-in-concurrent-speech processing in ASD independent of language ability, as well as an association between early language delay in ASD and inadequate temporal speech processing. We propose that reduced voice stream segregation and inadequate social attentional orienting in ASD result in disproportional informational masking of the speech signal. These findings indicate a speech-in-speech processing deficit in autistic adolescents with broad implications for the quality of social communication.
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Affiliation(s)
- Diego Ruiz Callejo
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Jan Wouters
- Research Group ExpORL, Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Leuven Brain Institute (LBI), KU Leuven, Leuven, Belgium
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13
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Evenepoel M, Moerkerke M, Daniels N, Chubar V, Claes S, Turner J, Vanaudenaerde B, Willems L, Verhaeghe J, Prinsen J, Steyaert J, Boets B, Alaerts K. Endogenous oxytocin levels in children with autism: Associations with cortisol levels and oxytocin receptor gene methylation. Transl Psychiatry 2023; 13:235. [PMID: 37391413 DOI: 10.1038/s41398-023-02524-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 06/08/2023] [Accepted: 06/13/2023] [Indexed: 07/02/2023] Open
Abstract
Alterations in the brain's oxytocinergic system have been suggested to play an important role in the pathophysiology of autism spectrum disorder (ASD), but insights from pediatric populations are sparse. Here, salivary oxytocin was examined in the morning (AM) and afternoon (PM) in school-aged children with (n = 80) and without (n = 40) ASD (boys/girls 4/1), and also characterizations of DNA methylation (DNAm) of the oxytocin receptor gene (OXTR) were obtained. Further, cortisol levels were assessed to examine links between the oxytocinergic system and hypothalamic-pituitary-adrenal (HPA) axis signaling. Children with ASD displayed altered (diminished) oxytocin levels in the morning, but not in the afternoon, after a mildly stress-inducing social interaction session. Notably, in the control group, higher oxytocin levels at AM were associated with lower stress-induced cortisol at PM, likely reflective of a protective stress-regulatory mechanism for buffering HPA stress activity. In children with ASD, on the other hand, a significant rise in oxytocin levels from the morning to the afternoon was associated with a higher stress-induced cortisol release in the afternoon, likely reflective of a more reactive stress regulatory release of oxytocin for reactively coping with heightened HPA activity. Regarding epigenetic modifications, no overall pattern of OXTR hypo- or hypermethylation was evident in ASD. In control children, a notable association between OXTR methylation and levels of cortisol at PM was evident, likely indicative of a compensatory downregulation of OXTR methylation (higher oxytocin receptor expression) in children with heightened HPA axis activity. Together, these observations bear important insights into altered oxytocinergic signaling in ASD, which may aid in establishing relevant biomarkers for diagnostic and/or treatment evaluation purposes targeting the oxytocinergic system in ASD.
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Affiliation(s)
- Margaux Evenepoel
- KU Leuven, Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, Leuven, Belgium
- KU Leuven, Leuven Autism Research (LAuRes), Leuven, Belgium
| | - Matthijs Moerkerke
- KU Leuven, Leuven Autism Research (LAuRes), Leuven, Belgium
- KU Leuven, Department of Neurosciences, Center for Developmental Psychiatry, Leuven, Belgium
| | - Nicky Daniels
- KU Leuven, Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, Leuven, Belgium
- KU Leuven, Leuven Autism Research (LAuRes), Leuven, Belgium
| | | | - Stephan Claes
- University Psychiatric Centre, KU Leuven, Leuven, Belgium
| | - Jonathan Turner
- Luxembourg Institute of Health, Department of Infection and Immunity, Esch sur Alzette, Luxembourg
| | - Bart Vanaudenaerde
- KU Leuven, Department of Chronic Illness and Metabolism, Laboratory of Respiratory Diseases and Thoracic Surgery, Leuven, Belgium
| | - Lynn Willems
- KU Leuven, Department of Chronic Illness and Metabolism, Laboratory of Respiratory Diseases and Thoracic Surgery, Leuven, Belgium
| | - Johan Verhaeghe
- KU Leuven, Department of Development and Regeneration, Research Group Woman and Child, Leuven, Belgium
| | - Jellina Prinsen
- KU Leuven, Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, Leuven, Belgium
- KU Leuven, Leuven Autism Research (LAuRes), Leuven, Belgium
| | - Jean Steyaert
- KU Leuven, Leuven Autism Research (LAuRes), Leuven, Belgium
- KU Leuven, Department of Neurosciences, Center for Developmental Psychiatry, Leuven, Belgium
| | - Bart Boets
- KU Leuven, Leuven Autism Research (LAuRes), Leuven, Belgium
- KU Leuven, Department of Neurosciences, Center for Developmental Psychiatry, Leuven, Belgium
| | - Kaat Alaerts
- KU Leuven, Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, Leuven, Belgium.
- KU Leuven, Leuven Autism Research (LAuRes), Leuven, Belgium.
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14
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de Vries LM, Amelynck S, Nyström P, van Esch L, Van Lierde T, Warreyn P, Roeyers H, Noens I, Naulaers G, Boets B, Steyaert J. Investigating the development of the autonomic nervous system in infancy through pupillometry. J Neural Transm (Vienna) 2023; 130:723-734. [PMID: 36906867 PMCID: PMC10008146 DOI: 10.1007/s00702-023-02616-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 02/27/2023] [Indexed: 03/13/2023]
Abstract
We aim to investigate early developmental trajectories of the autonomic nervous system (ANS) as indexed by the pupillary light reflex (PLR) in infants with (i.e. preterm birth, feeding difficulties, or siblings of children with autism spectrum disorder) and without (controls) increased likelihood for atypical ANS development. We used eye-tracking to capture the PLR in 216 infants in a longitudinal follow-up study spanning 5 to 24 months of age, and linear mixed models to investigate effects of age and group on three PLR parameters: baseline pupil diameter, latency to constriction and relative constriction amplitude. An increase with age was found in baseline pupil diameter (F(3,273.21) = 13.15, p < 0.001, [Formula: see text] = 0.13), latency to constriction (F(3,326.41) = 3.84, p = 0.010, [Formula: see text] = 0.03) and relative constriction amplitude(F(3,282.53) = 3.70, p = 0.012, [Formula: see text] = 0.04). Group differences were found for baseline pupil diameter (F(3,235.91) = 9.40, p < 0.001, [Formula: see text] = 0.11), with larger diameter in preterms and siblings than in controls, and for latency to constriction (F(3,237.10) = 3.48, p = 0.017, [Formula: see text] = 0.04), with preterms having a longer latency than controls. The results align with previous evidence, with development over time that could be explained by ANS maturation. To better understand the cause of the group differences, further research in a larger sample is necessary, combining pupillometry with other measures to further validate its value.
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Affiliation(s)
- Lyssa M de Vries
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Herestraat 49 Box 1029, 3000, Louvain, Belgium.
- University Hospital Leuven, Louvain, Belgium.
- Leuven Autism Research (LAuRes), KU Leuven, Louvain, Belgium.
| | - Steffie Amelynck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Herestraat 49 Box 1029, 3000, Louvain, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Louvain, Belgium
| | - Pär Nyström
- Developmental Psychology, Department of Psychology, Uppsala University, Uppsala, Sweden
| | - Lotte van Esch
- Leuven Autism Research (LAuRes), KU Leuven, Louvain, Belgium
- Parenting and Special Education Research Unit, Faculty of Psychology and Educational Sciences, KU Leuven, Louvain, Belgium
| | - Thijs Van Lierde
- RIDDL Lab, Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Petra Warreyn
- RIDDL Lab, Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Herbert Roeyers
- RIDDL Lab, Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium
| | - Ilse Noens
- Leuven Autism Research (LAuRes), KU Leuven, Louvain, Belgium
- Parenting and Special Education Research Unit, Faculty of Psychology and Educational Sciences, KU Leuven, Louvain, Belgium
| | - Gunnar Naulaers
- University Hospital Leuven, Louvain, Belgium
- Woman and Child, Department of Development and Regeneration, KU Leuven, Louvain, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Herestraat 49 Box 1029, 3000, Louvain, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Louvain, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Herestraat 49 Box 1029, 3000, Louvain, Belgium
- University Hospital Leuven, Louvain, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Louvain, Belgium
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15
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Daniels N, Moerkerke M, Steyaert J, Bamps A, Debbaut E, Prinsen J, Tang T, Van der Donck S, Boets B, Alaerts K. Effects of multiple-dose intranasal oxytocin administration on social responsiveness in children with autism: a randomized, placebo-controlled trial. Mol Autism 2023; 14:16. [PMID: 37081454 PMCID: PMC10117268 DOI: 10.1186/s13229-023-00546-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 03/30/2023] [Indexed: 04/22/2023] Open
Abstract
BACKGROUND Intranasal administration of oxytocin is increasingly explored as a new approach to facilitate social development and reduce disability associated with a diagnosis of autism spectrum disorder (ASD). The efficacy of multiple-dose oxytocin administration in children with ASD is, however, not well established. METHODS A double-blind, randomized, placebo-controlled trial with parallel design explored the effects of a 4-week intranasal oxytocin administration (12 IU, twice daily) on parent-rated social responsiveness (Social Responsiveness Scale: SRS-2) in pre-pubertal school-aged children (aged 8-12 years, 61 boys, 16 girls). Secondary outcomes included a questionnaire-based assessment of repetitive behaviors, anxiety, and attachment. Effects of oxytocin were assessed immediately after the administration period and at a follow-up, 4 weeks after the last administration. The double-blind phase was followed by a 4-week single-blind phase during which all participants received intranasal oxytocin. RESULTS In the double-blind phase, both the oxytocin and placebo group displayed significant pre-to-post-improvements in social responsiveness and secondary questionnaires, but improvements were not specific to the intranasal oxytocin. Notably, in the single-blind phase, participants who were first allocated to intranasal placebo and later changed to intranasal oxytocin displayed a significant improvement in social responsiveness, over and above the placebo-induced improvements noted in the first phase. Participants receiving oxytocin in the first phase also showed a significant further improvement upon receiving a second course of oxytocin, but only at the 4-week follow-up. Further, exploratory moderator analyses indicated that children who received psychosocial trainings (3 or more sessions per month) along with oxytocin administration displayed a more pronounced improvement in social responsiveness. LIMITATIONS Future studies using larger cohorts and more explicitly controlled concurrent psychosocial trainings are warranted to further explore the preliminary moderator effects, also including understudied populations within the autism spectrum, such as children with co-occurring intellectual disabilities. CONCLUSIONS Four weeks of oxytocin administration did not induce treatment-specific improvements in social responsiveness in school-aged children with ASD. Future studies are warranted to further explore the clinical efficacy of oxytocin administration paired with targeted psychosocial trainings that stimulate socio-communicative behaviors. Trial registration The trial was registered with the European Clinical Trial Registry (EudraCT 2018-000769-35) on June 7th, 2018 ( https://www.clinicaltrialsregister.eu/ctr-search/trial/2018-000769-35/BE ).
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Affiliation(s)
- Nicky Daniels
- Department of Rehabilitation Sciences, KU Leuven, Tervuursevest 101, Box 1501, 3001, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Matthijs Moerkerke
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
- Department of Child Psychiatry, UPC KU Leuven, Leuven, Belgium
| | - Annelies Bamps
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Child Psychiatry, UPC KU Leuven, Leuven, Belgium
| | - Edward Debbaut
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
- Department of Child Psychiatry, UPC KU Leuven, Leuven, Belgium
| | - Jellina Prinsen
- Department of Rehabilitation Sciences, KU Leuven, Tervuursevest 101, Box 1501, 3001, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Tiffany Tang
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Stephanie Van der Donck
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Kaat Alaerts
- Department of Rehabilitation Sciences, KU Leuven, Tervuursevest 101, Box 1501, 3001, Leuven, Belgium.
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.
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16
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Meulemeester CD, Lowyck B, Boets B, van der Donck S, Verhaest Y, Luyten P. "Feeling Invisible": Individuals With Borderline Personality Disorder Underestimate the Transparency of Their Emotions. J Pers Disord 2023; 37:213-232. [PMID: 37002937 DOI: 10.1521/pedi.2023.37.2.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
The present study investigated transparency estimation, that is, the ability to estimate how observable one's emotions are, in patients diagnosed with borderline personality disorder (BPD) (n = 35) and healthy controls (HCs; n = 35). Participants watched emotionally evocative video clips and estimated the transparency of their own emotional experience while watching the clip. Facial expression coding software (FaceReader) quantified their objective transparency. BPD patients felt significantly less transparent than HCs, but there were no differences in objective transparency. BPD patients tended to underestimate the transparency of their emotions compared to HCs, who in turn overestimated their transparency. This suggests that BPD patients expect that others will not know how they feel, irrespective of how observable their emotions actually are. We link these findings to low emotional awareness and a history of emotional invalidation in BPD, and we discuss their impact on BPD patients' social functioning.
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Affiliation(s)
| | - Benedicte Lowyck
- University Psychiatric Hospital UPC KU Leuven, Campus Kortenberg, and Department of Neurosciences, Faculty of Medicine, KU Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium
| | | | - Yannic Verhaest
- University Psychiatric Hospital UPC KU Leuven, Campus Kortenberg, and Department of Neurosciences, Faculty of Medicine, KU Leuven, Belgium
| | - Patrick Luyten
- Faculty of Psychology and Educational Sciences, KU Leuven, Belgium
- Research Department of Clinical, Educational and Health Psychology, University College London, United Kingdom
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17
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Samaey C, Lecei A, Achterhof R, Hagemann N, Hermans KSFM, Hiekkaranta AP, Kirtley OJ, Reininghaus U, Boets B, Myin-Germeys I, van Winkel R. The role of identity in the development of depressive, anxiety, and psychosis symptoms in adolescents exposed to childhood adversity. J Adolesc 2023. [PMID: 36737250 DOI: 10.1002/jad.12145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 02/05/2023]
Abstract
INTRODUCTION Childhood adversity is a major risk factor for psychiatric disorders and has especially been associated with an admixture of depressive, anxiety, and psychosis symptoms. Identity formation, a main developmental task during adolescence, may be impacted by these adverse experiences and act as an important process in the association between childhood adversity and psychopathology. METHODS We investigated the association between childhood adversity, identity formation, and depressive, anxiety, and psychosis symptoms cross-sectionally in 1913 Flemish adolescents between 11 and 20 years old (mean = 13.76, SD = 1.86). Adolescents completed questionnaires during the first wave of the SIGMA study between January 2018 and May 2019. RESULTS Childhood interpersonal adversity was associated with increased identity confusion and decreased identity synthesis. Additionally, identity confusion was associated with increased self-reported levels of psychopathology and potentially mediated the association between childhood adversity and psychopathology. CONCLUSION This study highlights the importance of promoting healthy identity formation in adolescents with and without exposure to adverse childhood experiences.
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Affiliation(s)
- Celine Samaey
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Clinical Psychiatry, Leuven, Belgium
| | - Aleksandra Lecei
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Clinical Psychiatry, Leuven, Belgium
| | - Robin Achterhof
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, Leuven, Belgium
| | - Noëmi Hagemann
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, Leuven, Belgium
| | - Karlijn S F M Hermans
- Strategy and Academic Affairs, Administration and Central Services, Leiden University, Leiden, The Netherlands
| | - Anu P Hiekkaranta
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, Leuven, Belgium
| | - Olivia J Kirtley
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, Leuven, Belgium
| | - Ulrich Reininghaus
- Department of Public Mental Health, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Baden-Württemberg, Germany.,ESRC Centre for Society and Mental Health and Social Epidemiology Research Group, King's College London, London, London, UK
| | - Bart Boets
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Developmental Psychiatry, Leuven, Belgium.,KU Leuven, Leuven Autism Research (LAuRes), Leuven, Belgium
| | - Inez Myin-Germeys
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Contextual Psychiatry, Leuven, Belgium
| | - Ruud van Winkel
- KU Leuven, Department of Neurosciences, Research Group Psychiatry, Center for Clinical Psychiatry, Leuven, Belgium.,KU Leuven, University Psychiatric Center (UPC), Leuven, Belgium
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18
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Vos S, Collignon O, Boets B. The Sound of Emotion: Pinpointing Emotional Voice Processing Via Frequency Tagging EEG. Brain Sci 2023; 13:brainsci13020162. [PMID: 36831705 PMCID: PMC9954097 DOI: 10.3390/brainsci13020162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
Successfully engaging in social communication requires efficient processing of subtle socio-communicative cues. Voices convey a wealth of social information, such as gender, identity, and the emotional state of the speaker. We tested whether our brain can systematically and automatically differentiate and track a periodic stream of emotional utterances among a series of neutral vocal utterances. We recorded frequency-tagged EEG responses of 20 neurotypical male adults while presenting streams of neutral utterances at a 4 Hz base rate, interleaved with emotional utterances every third stimulus, hence at a 1.333 Hz oddball frequency. Four emotions (happy, sad, angry, and fear) were presented as different conditions in different streams. To control the impact of low-level acoustic cues, we maximized variability among the stimuli and included a control condition with scrambled utterances. This scrambling preserves low-level acoustic characteristics but ensures that the emotional character is no longer recognizable. Results revealed significant oddball EEG responses for all conditions, indicating that every emotion category can be discriminated from the neutral stimuli, and every emotional oddball response was significantly higher than the response for the scrambled utterances. These findings demonstrate that emotion discrimination is fast, automatic, and is not merely driven by low-level perceptual features. Eventually, here, we present a new database for vocal emotion research with short emotional utterances (EVID) together with an innovative frequency-tagging EEG paradigm for implicit vocal emotion discrimination.
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Affiliation(s)
- Silke Vos
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
- Leuven Brain Institute (LBI), KU Leuven, 3000 Leuven, Belgium
- Correspondence: ; Tel.: +32-16-37-76-83
| | - Olivier Collignon
- Institute of Research in Psychology & Institute of Neuroscience, Université Catholique de Louvain, 1348 Louvain-La-Neuve, Belgium
- School of Health Sciences, HES-SO Valais-Wallis, The Sense Innovation and Research Center, 1007 Lausanne and 1950 Sion, Switzerland
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
- Leuven Brain Institute (LBI), KU Leuven, 3000 Leuven, Belgium
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19
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Qiao Z, Van der Donck S, Moerkerke M, Dlhosova T, Vettori S, Dzhelyova M, van Winkel R, Alaerts K, Boets B. Frequency-Tagging EEG of Superimposed Social and Non-Social Visual Stimulation Streams Provides No Support for Social Salience Enhancement after Intranasal Oxytocin Administration. Brain Sci 2022; 12:brainsci12091224. [PMID: 36138960 PMCID: PMC9496939 DOI: 10.3390/brainsci12091224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/31/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
The social salience hypothesis proposes that the neuropeptide oxytocin (OT) can impact human social behavior by modulating the salience of social cues. Here, frequency-tagging EEG was used to quantify the neural responses to social versus non-social stimuli while administering a single dose of OT (24 IU) versus placebo treatment. Specifically, two streams of faces and houses were superimposed on one another, with each stream of stimuli tagged with a particular presentation rate (i.e., 6 and 7.5 Hz or vice versa). These distinctive frequency tags allowed unambiguously disentangling and objectively quantifying the respective neural responses elicited by the different streams of stimuli. This study involved a double-blind, placebo-controlled, cross-over trial with 31 healthy adult men. Based on four trials of 60 s, we detected robust frequency-tagged neural responses in each individual, with entrainment to faces being more pronounced in lateral occipito-temporal regions and entrainment to houses being focused in medial occipital regions. However, contrary to our expectation, a single dose of OT did not modulate these stimulus-driven neural responses, not in terms of enhanced social processing nor in terms of generally enhanced information salience. Bayesian analyses formally confirmed these null findings. Possibly, the baseline ceiling level performance of these neurotypical adult participants as well as the personal irrelevance of the applied stimulation streams might have hindered the observation of any OT effect.
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Affiliation(s)
- Zhiling Qiao
- Center for Clinical Psychiatry, Department of Neuroscience, KU Leuven, 3000 Leuven, Belgium
- Correspondence:
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
| | - Matthijs Moerkerke
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
| | - Tereza Dlhosova
- Department of Psychology, Faculty of Arts, Masaryk University, 60200 Brno, Czech Republic
| | - Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
- Institute of Cognitive Sciences Marc Jeannerod, UMR5229, CNRS, University Claude Bernard Lyon1, 69675 Bron, France
| | - Milena Dzhelyova
- Institute of Research in Psychological Sciences, Université de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Ruud van Winkel
- Center for Clinical Psychiatry, Department of Neuroscience, KU Leuven, 3000 Leuven, Belgium
- UPC, KU Leuven, 3000 Leuven, Belgium
- Department of Psychiatry and Psychology, School for Mental Health and Neuroscience, Maastricht University, 6211 Maastricht, The Netherlands
| | - Kaat Alaerts
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
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20
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Van der Donck S, Moerkerke M, Dlhosova T, Vettori S, Dzhelyova M, Alaerts K, Boets B. Monitoring the effect of oxytocin on the neural sensitivity to emotional faces via frequency-tagging EEG: A double-blind, cross-over study. Psychophysiology 2022; 59:e14026. [PMID: 35150446 DOI: 10.1111/psyp.14026] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 12/05/2021] [Accepted: 01/16/2022] [Indexed: 01/23/2023]
Abstract
The neuropeptide oxytocin (OXT) is suggested to exert an important role in human social behaviors by modulating the salience of social cues. To date, however, there is mixed evidence whether a single dose of OXT can improve the behavioral and neural sensitivity for emotional face processing. To overcome difficulties encountered with classic event-related potential studies assessing stimulus-saliency, we applied frequency-tagging EEG to implicitly assess the effect of a single dose of OXT (24 IU) on the neural sensitivity for positive and negative facial emotions. Neutral faces with different identities were presented at 6 Hz, periodically interleaved with an expressive face (angry, fearful, and happy, in separate sequences) every fifth image (i.e., 1.2 Hz oddball frequency). These distinctive frequency tags for neutral and expressive stimuli allowed direct and objective quantification of the neural expression-categorization responses. The study involved a double-blind, placebo-controlled, cross-over trial with 31 healthy adult men. Contrary to our expectations, we did not find an effect of OXT on facial emotion processing, neither at the neural, nor at the behavioral level. A single dose of OXT did not evoke social enhancement in general, nor did it affect social approach-avoidance tendencies. Possibly ceiling performances in facial emotion processing might have hampered further improvement.
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Affiliation(s)
- Stephanie Van der Donck
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Matthijs Moerkerke
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Tereza Dlhosova
- Department of Psychology, Faculty of Arts, Masaryk University, Brno, Czech Republic
| | - Sofie Vettori
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Milena Dzhelyova
- Institute of Research in Psychological Sciences, Université de Louvain, Louvain-La-Neuve, Belgium.,Institute of Neuroscience, Université de Louvain, Louvain-La-Neuve, Belgium
| | - Kaat Alaerts
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Department of Rehabilitation Sciences, Neurorehabilitation Research Group, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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21
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Moerkerke M, Peeters M, de Vries L, Daniels N, Steyaert J, Alaerts K, Boets B. Endogenous Oxytocin Levels in Autism-A Meta-Analysis. Brain Sci 2021; 11:1545. [PMID: 34827545 PMCID: PMC8615844 DOI: 10.3390/brainsci11111545] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/15/2021] [Accepted: 11/19/2021] [Indexed: 12/03/2022] Open
Abstract
Oxytocin (OT) circuitry plays a major role in the mediation of prosocial behavior. Individuals with autism spectrum disorder (ASD) are characterized by impairments in social interaction and communication and have been suggested to display deficiencies in central OT mechanisms. The current preregistered meta-analysis evaluated potential group differences in endogenous OT levels between individuals with ASD and neurotypical (NT) controls. We included 18 studies comprising a total of 1422 participants. We found that endogenous OT levels are lower in children with ASD as compared to NT controls (n = 1123; g = -0.60; p = 0.006), but this effect seems to disappear in adolescent (n = 152; g = -0.20; p = 0.53) and adult populations (n = 147; g = 0.27; p = 0.45). Secondly, while no significant subgroup differences were found in regard to sex, the group difference in OT levels of individuals with versus without ASD seems to be only present in the studies with male participants (n = 814; g = -0.44; p = 0.08) and not female participants (n = 192; g = 0.11; p = 0.47). More research that employs more homogeneous methods is necessary to investigate potential developmental changes in endogenous OT levels, both in typical and atypical development, and to explore the possible use of OT level measurement as a diagnostic marker of ASD.
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Affiliation(s)
- Matthijs Moerkerke
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium; (M.P.); (L.d.V.); (J.S.); (B.B.)
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium; (N.D.); (K.A.)
| | - Mathieu Peeters
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium; (M.P.); (L.d.V.); (J.S.); (B.B.)
| | - Lyssa de Vries
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium; (M.P.); (L.d.V.); (J.S.); (B.B.)
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium; (N.D.); (K.A.)
| | - Nicky Daniels
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium; (N.D.); (K.A.)
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium; (M.P.); (L.d.V.); (J.S.); (B.B.)
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium; (N.D.); (K.A.)
| | - Kaat Alaerts
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium; (N.D.); (K.A.)
- Research Group for Neurorehabilitation, Department of Rehabilitation Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000 Leuven, Belgium; (M.P.); (L.d.V.); (J.S.); (B.B.)
- Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium; (N.D.); (K.A.)
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22
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De Meulemeester C, Lowyck B, Boets B, Van der Donck S, Luyten P. Do my emotions show or not? Problems with transparency estimation in women with borderline personality disorder features. Personal Disord 2021; 13:288-299. [PMID: 34672637 DOI: 10.1037/per0000504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Transparency estimation, that is, estimating the extent to which one's mental states are observable to others, requires the simultaneous representation of the self and of others' perspective on the self. Individuals with borderline personality disorder (BPD) have difficulty integrating multiple perspectives when mentalizing, which may be reflected in impaired transparency estimation. A total of 62 participants high and low in BPD features watched emotionally evocative video clips and estimated the transparency of their emotional experience while facial expression coding software (FaceReader) quantified their objective transparency. Individuals high in BPD features showed a larger discrepancy between estimated and objective transparency than individuals low in BPD features, showing that they both over- and underestimated their transparency. Indeed, estimated transparency positively predicted objective transparency in individuals low in BPD features, but not in individuals high in BPD features. Moreover, the ability to estimate intraindividual variability in one's own objective transparency was moderated by self-reported arousal in the participants high in BPD features. Impairments in transparency estimation were correlated with self-report measures of borderline features, attachment, and mentalizing. In conclusion, we found that borderline features relate to a reduced capacity to estimate the extent to which one's own emotional states are observable to others. Although replication in clinical samples of BPD patients is needed, the present study provides evidence for problems in mentalizing the (embodied) self from another person's perspective in BPD. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
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23
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Van der Donck S, Vettori S, Dzhelyova M, Mahdi SS, Claes P, Steyaert J, Boets B. Investigating automatic emotion processing in boys with autism via eye tracking and facial mimicry recordings. Autism Res 2021; 14:1404-1420. [PMID: 33704930 DOI: 10.1002/aur.2490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 02/08/2021] [Indexed: 11/08/2022]
Abstract
Difficulties in automatic emotion processing in individuals with autism spectrum disorder (ASD) might remain concealed in behavioral studies due to compensatory strategies. To gain more insight in the mechanisms underlying facial emotion recognition, we recorded eye tracking and facial mimicry data of 20 school-aged boys with ASD and 20 matched typically developing controls while performing an explicit emotion recognition task. Proportional looking times to specific face regions (eyes, nose, and mouth) and face exploration dynamics were analyzed. In addition, facial mimicry was assessed. Boys with ASD and controls were equally capable to recognize expressions and did not differ in proportional looking times, and number and duration of fixations. Yet, specific facial expressions elicited particular gaze patterns, especially within the control group. Both groups showed similar face scanning dynamics, although boys with ASD demonstrated smaller saccadic amplitudes. Regarding the facial mimicry, we found no emotion specific facial responses and no group differences in the responses to the displayed facial expressions. Our results indicate that boys with and without ASD employ similar eye gaze strategies to recognize facial expressions. Smaller saccadic amplitudes in boys with ASD might indicate a less exploratory face processing strategy. Yet, this slightly more persistent visual scanning behavior in boys with ASD does not imply less efficient emotion information processing, given the similar behavioral performance. Results on the facial mimicry data indicate similar facial responses to emotional faces in boys with and without ASD. LAY SUMMARY: We investigated (i) whether boys with and without autism apply different face exploration strategies when recognizing facial expressions and (ii) whether they mimic the displayed facial expression to a similar extent. We found that boys with and without ASD recognize facial expressions equally well, and that both groups show similar facial reactions to the displayed facial emotions. Yet, boys with ASD visually explored the faces slightly less than the boys without ASD.
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Affiliation(s)
- Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Milena Dzhelyova
- Institute of Research in Psychological Sciences, Institute of Neuroscience, Université de Louvain, Louvain-La-Neuve, Belgium
| | - Soha Sadat Mahdi
- Medical Imaging Research Center, MIRC, Leuven, Belgium.,Department of Electrical Engineering (ESAT/PSI), KU Leuven, Leuven, Belgium
| | - Peter Claes
- Medical Imaging Research Center, MIRC, Leuven, Belgium.,Department of Electrical Engineering (ESAT/PSI), KU Leuven, Leuven, Belgium.,Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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24
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Hendriks MHA, Dillen C, Vettori S, Vercammen L, Daniels N, Steyaert J, Op de Beeck H, Boets B. Neural processing of facial identity and expression in adults with and without autism: A multi-method approach. Neuroimage Clin 2020; 29:102520. [PMID: 33338966 PMCID: PMC7750419 DOI: 10.1016/j.nicl.2020.102520] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 10/23/2020] [Accepted: 11/30/2020] [Indexed: 11/28/2022]
Abstract
The ability to recognize faces and facial expressions is a common human talent. It has, however, been suggested to be impaired in individuals with autism spectrum disorder (ASD). The goal of this study was to compare the processing of facial identity and emotion between individuals with ASD and neurotypicals (NTs). Behavioural and functional magnetic resonance imaging (fMRI) data from 46 young adults (aged 17-23 years, NASD = 22, NNT = 24) was analysed. During fMRI data acquisition, participants discriminated between short clips of a face transitioning from a neutral to an emotional expression. Stimuli included four identities and six emotions. We performed behavioural, univariate, multi-voxel, adaptation and functional connectivity analyses to investigate potential group differences. The ASD-group did not differ from the NT-group on behavioural identity and expression processing tasks. At the neural level, we found no differences in average neural activation, neural activation patterns and neural adaptation to faces in face-related brain regions. In terms of functional connectivity, we found that amygdala seems to be more strongly connected to inferior occipital cortex and V1 in individuals with ASD. Overall, the findings indicate that neural representations of facial identity and expression have a similar quality in individuals with and without ASD, but some regions containing these representations are connected differently in the extended face processing network.
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Affiliation(s)
- Michelle H A Hendriks
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102 - bus 3714, Leuven, Belgium; Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium
| | - Claudia Dillen
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102 - bus 3714, Leuven, Belgium; Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium
| | - Sofie Vettori
- Centre for Developmental Psychiatry, KU Leuven, Kapucijnenvoer 7 blok h - bus 7001, Leuven, Belgium; Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium
| | - Laura Vercammen
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102 - bus 3714, Leuven, Belgium
| | - Nicky Daniels
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102 - bus 3714, Leuven, Belgium; Centre for Developmental Psychiatry, KU Leuven, Kapucijnenvoer 7 blok h - bus 7001, Leuven, Belgium; Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Centre for Developmental Psychiatry, KU Leuven, Kapucijnenvoer 7 blok h - bus 7001, Leuven, Belgium; Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium
| | - Hans Op de Beeck
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102 - bus 3714, Leuven, Belgium; Leuven Brain Institute, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Centre for Developmental Psychiatry, KU Leuven, Kapucijnenvoer 7 blok h - bus 7001, Leuven, Belgium; Leuven Brain Institute, KU Leuven, Leuven, Belgium; Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium.
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25
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Vettori S, Van der Donck S, Nys J, Moors P, Van Wesemael T, Steyaert J, Rossion B, Dzhelyova M, Boets B. Combined frequency-tagging EEG and eye-tracking measures provide no support for the "excess mouth/diminished eye attention" hypothesis in autism. Mol Autism 2020; 11:94. [PMID: 33228763 PMCID: PMC7686749 DOI: 10.1186/s13229-020-00396-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 11/02/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Scanning faces is important for social interactions. Difficulty with the social use of eye contact constitutes one of the clinical symptoms of autism spectrum disorder (ASD). It has been suggested that individuals with ASD look less at the eyes and more at the mouth than typically developing (TD) individuals, possibly due to gaze aversion or gaze indifference. However, eye-tracking evidence for this hypothesis is mixed. While gaze patterns convey information about overt orienting processes, it is unclear how this is manifested at the neural level and how relative covert attention to the eyes and mouth of faces might be affected in ASD. METHODS We used frequency-tagging EEG in combination with eye tracking, while participants watched fast flickering faces for 1-min stimulation sequences. The upper and lower halves of the faces were presented at 6 Hz and 7.5 Hz or vice versa in different stimulation sequences, allowing to objectively disentangle the neural saliency of the eyes versus mouth region of a perceived face. We tested 21 boys with ASD (8-12 years old) and 21 TD control boys, matched for age and IQ. RESULTS Both groups looked longer at the eyes than the mouth, without any group difference in relative fixation duration to these features. TD boys looked significantly more to the nose, while the ASD boys looked more outside the face. EEG neural saliency data partly followed this pattern: neural responses to the upper or lower face half were not different between groups, but in the TD group, neural responses to the lower face halves were larger than responses to the upper part. Face exploration dynamics showed that TD individuals mostly maintained fixations within the same facial region, whereas individuals with ASD switched more often between the face parts. LIMITATIONS Replication in large and independent samples may be needed to validate exploratory results. CONCLUSIONS Combined eye-tracking and frequency-tagged neural responses show no support for the excess mouth/diminished eye gaze hypothesis in ASD. The more exploratory face scanning style observed in ASD might be related to their increased feature-based face processing style.
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Affiliation(s)
- Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, University of Leuven (KU Leuven), Leuven, Belgium.
- Leuven Autism Research (LAuRes), University of Leuven (KU Leuven), Leuven, Belgium.
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, University of Leuven (KU Leuven), Leuven, Belgium
- Leuven Autism Research (LAuRes), University of Leuven (KU Leuven), Leuven, Belgium
| | - Jannes Nys
- Department of Physics and Astronomy, Ghent University, Ghent, Belgium
- IDLab - Department of Computer Science, University of Antwerp - IMEC, Antwerp, Belgium
| | - Pieter Moors
- Laboratory of Experimental Psychology, University of Leuven (KU Leuven), Leuven, Belgium
| | - Tim Van Wesemael
- Department of Electrical Engineering (ESAT), Stadius Center for Dynamical Systems, Signal Processing and Data Analytics, Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, University of Leuven (KU Leuven), Leuven, Belgium
- Leuven Autism Research (LAuRes), University of Leuven (KU Leuven), Leuven, Belgium
| | - Bruno Rossion
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Louvain-La-Neuve, Belgium
- CNRS, CRAN - UMR 7039, Université de Lorraine, 54000, Nancy, France
- CHRU-Nancy, Service de Neurologie, Université de Lorraine, 54000, Nancy, France
| | - Milena Dzhelyova
- Leuven Autism Research (LAuRes), University of Leuven (KU Leuven), Leuven, Belgium
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Louvain-La-Neuve, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, University of Leuven (KU Leuven), Leuven, Belgium
- Leuven Autism Research (LAuRes), University of Leuven (KU Leuven), Leuven, Belgium
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Samaey C, Van der Donck S, van Winkel R, Boets B. Facial Expression Processing Across the Autism-Psychosis Spectra: A Review of Neural Findings and Associations With Adverse Childhood Events. Front Psychiatry 2020; 11:592937. [PMID: 33281648 PMCID: PMC7691238 DOI: 10.3389/fpsyt.2020.592937] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 10/09/2020] [Indexed: 11/13/2022] Open
Abstract
Autism spectrum disorder (ASD) and primary psychosis are classified as distinct neurodevelopmental disorders, yet they display overlapping epidemiological, environmental, and genetic components as well as endophenotypic similarities. For instance, both disorders are characterized by impairments in facial expression processing, a crucial skill for effective social communication, and both disorders display an increased prevalence of adverse childhood events (ACE). This narrative review provides a brief summary of findings from neuroimaging studies investigating facial expression processing in ASD and primary psychosis with a focus on the commonalities and differences between these disorders. Individuals with ASD and primary psychosis activate the same brain regions as healthy controls during facial expression processing, albeit to a different extent. Overall, both groups display altered activation in the fusiform gyrus and amygdala as well as altered connectivity among the broader face processing network, probably indicating reduced facial expression processing abilities. Furthermore, delayed or reduced N170 responses have been reported in ASD and primary psychosis, but the significance of these findings is questioned, and alternative frequency-tagging electroencephalography (EEG) measures are currently explored to capture facial expression processing impairments more selectively. Face perception is an innate process, but it is also guided by visual learning and social experiences. Extreme environmental factors, such as adverse childhood events, can disrupt normative development and alter facial expression processing. ACE are hypothesized to induce altered neural facial expression processing, in particular a hyperactive amygdala response toward negative expressions. Future studies should account for the comorbidity among ASD, primary psychosis, and ACE when assessing facial expression processing in these clinical groups, as it may explain some of the inconsistencies and confound reported in the field.
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Affiliation(s)
- Celine Samaey
- Department of Neurosciences, Center for Clinical Psychiatry, KU Leuven, Leuven, Belgium
| | - Stephanie Van der Donck
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Ruud van Winkel
- Department of Neurosciences, Center for Clinical Psychiatry, KU Leuven, Leuven, Belgium
- University Psychiatric Center (UPC), KU Leuven, Leuven, Belgium
| | - Bart Boets
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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de Vries L, Fouquaet I, Boets B, Naulaers G, Steyaert J. Autism spectrum disorder and pupillometry: A systematic review and meta-analysis. Neurosci Biobehav Rev 2020; 120:479-508. [PMID: 33172600 DOI: 10.1016/j.neubiorev.2020.09.032] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 07/31/2020] [Accepted: 09/24/2020] [Indexed: 12/25/2022]
Abstract
Pupillometry, measuring pupil size and reactivity, has been proposed as a measure of autonomic nervous system functioning, the latter which might be altered in individuals with autism spectrum disorder (ASD). This study aims to evaluate if pupillary responses differ in individuals with and without ASD. After performing a systematic literature search, we conducted a meta-analysis and constructed a qualitative synthesis. The meta-analysis shows a longer latency of the pupil response in the ASD-group as a substantial group difference, with a Hedges' g of 1.03 (95% CI 0.49-1.56, p = 0.008). Evidence on baseline pupil size and amplitude change is conflicting. We used the framework method to perform a qualitative evaluation of these differences. Explanations for the group differences vary between studies and are inconclusive, but many authors point to involvement of the autonomous nervous system and more specifically the locus coeruleus-norepinephrine system. Pupillometry reveals differences between people with and without ASD, but the exact meaning of these differences remains unknown. Future studies should align research designs and investigate a possible effect of maturation.
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Affiliation(s)
- Lyssa de Vries
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium; Department of Child Psychiatry, UPC KU Leuven, Herestraat 49, 3000, Leuven, Belgium; KU Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.
| | - Iris Fouquaet
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium; KU Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Gunnar Naulaers
- Department of Development and Regeneration, University Hospitals Leuven, Neonatal Intensive Care Unit, Herestraat 49, 3000, Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium; Department of Child Psychiatry, UPC KU Leuven, Herestraat 49, 3000, Leuven, Belgium; KU Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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Van der Donck S, Dzhelyova M, Vettori S, Mahdi SS, Claes P, Steyaert J, Boets B. Rapid neural categorization of angry and fearful faces is specifically impaired in boys with autism spectrum disorder. J Child Psychol Psychiatry 2020; 61:1019-1029. [PMID: 32003011 PMCID: PMC7496330 DOI: 10.1111/jcpp.13201] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/18/2019] [Indexed: 01/05/2023]
Abstract
BACKGROUND Difficulties with facial expression processing may be associated with the characteristic social impairments in individuals with autism spectrum disorder (ASD). Emotional face processing in ASD has been investigated in an abundance of behavioral and EEG studies, yielding, however, mixed and inconsistent results. METHODS We combined fast periodic visual stimulation (FPVS) with EEG to assess the neural sensitivity to implicitly detect briefly presented facial expressions among a stream of neutral faces, in 23 boys with ASD and 23 matched typically developing (TD) boys. Neutral faces with different identities were presented at 6 Hz, periodically interleaved with an expressive face (angry, fearful, happy, sad in separate sequences) every fifth image (i.e., 1.2 Hz oddball frequency). These distinguishable frequency tags for neutral and expressive stimuli allowed direct and objective quantification of the expression-categorization responses, needing only four sequences of 60 s of recording per condition. RESULTS Both groups show equal neural synchronization to the general face stimulation and similar neural responses to happy and sad faces. However, the ASD group displays significantly reduced responses to angry and fearful faces, compared to TD boys. At the individual subject level, these neural responses allow to predict membership of the ASD group with an accuracy of 87%. Whereas TD participants show a significantly lower sensitivity to sad faces than to the other expressions, ASD participants show an equally low sensitivity to all the expressions. CONCLUSIONS Our results indicate an emotion-specific processing deficit, instead of a general emotion-processing problem: Boys with ASD are less sensitive than TD boys to rapidly and implicitly detect angry and fearful faces. The implicit, fast, and straightforward nature of FPVS-EEG opens new perspectives for clinical diagnosis.
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Affiliation(s)
- Stephanie Van der Donck
- Department of NeurosciencesCenter for Developmental PsychiatryKU LeuvenLeuvenBelgium
- Leuven Autism Research (LAuRes)KU LeuvenLeuvenBelgium
| | - Milena Dzhelyova
- Institute of Research in Psychological SciencesInstitute of NeuroscienceUniversity of LouvainLouvain‐La‐NeuveBelgium
| | - Sofie Vettori
- Department of NeurosciencesCenter for Developmental PsychiatryKU LeuvenLeuvenBelgium
- Leuven Autism Research (LAuRes)KU LeuvenLeuvenBelgium
| | - Soha Sadat Mahdi
- Department of NeurosciencesCenter for Developmental PsychiatryKU LeuvenLeuvenBelgium
- Medical Imaging Research Center, MIRCUZ LeuvenLeuvenBelgium
| | - Peter Claes
- Medical Imaging Research Center, MIRCUZ LeuvenLeuvenBelgium
- Department of Electrical Engineering (ESAT/PSI)KU LeuvenLeuvenBelgium
- Department of Human GeneticsKU LeuvenLeuvenBelgium
| | - Jean Steyaert
- Department of NeurosciencesCenter for Developmental PsychiatryKU LeuvenLeuvenBelgium
- Leuven Autism Research (LAuRes)KU LeuvenLeuvenBelgium
| | - Bart Boets
- Department of NeurosciencesCenter for Developmental PsychiatryKU LeuvenLeuvenBelgium
- Leuven Autism Research (LAuRes)KU LeuvenLeuvenBelgium
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Lee Masson H, Op de Beeck H, Boets B. Reduced task-dependent modulation of functional network architecture for positive versus negative affective touch processing in autism spectrum disorders. Neuroimage 2020; 219:117009. [PMID: 32504816 DOI: 10.1016/j.neuroimage.2020.117009] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 05/28/2020] [Accepted: 06/01/2020] [Indexed: 02/08/2023] Open
Abstract
Individuals with autism spectrum disorders (ASD) experience impairments in social communication and interaction, and often show difficulties with receiving and offering touch. Despite the high prevalence of abnormal reactions to touch in ASD, and the importance of touch communication in human relationships, the neural mechanisms underlying atypical touch processing in ASD remain largely unknown. To answer this question, we provided both pleasant and unpleasant touch stimulation to male adults with and without ASD during functional neuroimaging. By employing generalized psychophysiological interaction analysis combined with an independent component analysis approach, we characterize stimulus-dependent changes in functional connectivity patterns for processing two tactile stimuli that evoke different emotions (i.e., pleasant vs. unpleasant touch). Results reveal that neurotypical male adults showed extensive stimulus-sensitive modulations of the functional network architecture in response to the different types of touch, both at the level of brain regions and large-scale networks. Conversely, far fewer stimulus-sensitive modulations were observed in the ASD group. These aberrant functional connectivity profiles in the ASD group were marked by hypo-connectivity of the parietal operculum and major pain networks and hyper-connectivity between the semantic and limbic networks. Lastly, individuals presenting more social deficits and a more negative attitude towards social touch showed greater hyper-connectivity between the limbic and semantic networks. These findings suggest that reduced stimulus-related modulation of this functional network architecture is associated with abnormal processing of touch in ASD.
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Affiliation(s)
- Haemy Lee Masson
- Brain and Cognition, KU Leuven, 3000, Leuven, Belgium; Center for Developmental Psychiatry, KU Leuven, 3000, Leuven, Belgium; Leuven Brain Institute, KU Leuven, 3000, Leuven, Belgium; Leuven Autism Research (LAuRes) Consortium, KU Leuven, 3000, Leuven, Belgium.
| | - Hans Op de Beeck
- Brain and Cognition, KU Leuven, 3000, Leuven, Belgium; Leuven Brain Institute, KU Leuven, 3000, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, KU Leuven, 3000, Leuven, Belgium; Leuven Brain Institute, KU Leuven, 3000, Leuven, Belgium; Leuven Autism Research (LAuRes) Consortium, KU Leuven, 3000, Leuven, Belgium
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Vettori S, Dzhelyova M, Van der Donck S, Jacques C, Steyaert J, Rossion B, Boets B. Frequency-Tagging Electroencephalography of Superimposed Social and Non-Social Visual Stimulation Streams Reveals Reduced Saliency of Faces in Autism Spectrum Disorder. Front Psychiatry 2020; 11:332. [PMID: 32411029 PMCID: PMC7199527 DOI: 10.3389/fpsyt.2020.00332] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 04/02/2020] [Indexed: 12/30/2022] Open
Abstract
Individuals with autism spectrum disorder (ASD) have difficulties with social communication and interaction. The social motivation hypothesis states that a reduced interest in social stimuli may partly underlie these difficulties. Thus far, however, it has been challenging to quantify individual differences in social orientation and interest, and to pinpoint the neural underpinnings of it. In this study, we tested the neural sensitivity for social versus non-social information in 21 boys with ASD (8-12 years old) and 21 typically developing (TD) control boys, matched for age and IQ, while children were engaged in an orthogonal task. We recorded electroencephalography (EEG) during fast periodic visual stimulation (FPVS) of social versus non-social stimuli to obtain an objective implicit neural measure of relative social bias. Streams of variable images of faces and houses were superimposed, and each stream of stimuli was tagged with a particular presentation rate (i.e., 6 and 7.5 Hz or vice versa). This frequency-tagging method allows disentangling the respective neural responses evoked by the different streams of stimuli. Moreover, by using superimposed stimuli, we controlled for possible effects of preferential looking, spatial attention, and disengagement. Based on four trials of 60 s, we observed a significant three-way interaction. In the control group, the frequency-tagged neural responses to faces were larger than those to houses, especially in lateral occipito-temporal channels, while the responses to houses were larger over medial occipital channels. In the ASD group, however, faces and houses did not elicit significantly different neural responses in any of the regions. Given the short recording time of the frequency-tagging paradigm with multiple simultaneous inputs and the robustness of the individual responses, the method could be used as a sensitive marker of social preference in a wide range of populations, including younger and challenging populations.
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Affiliation(s)
- Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Milena Dzhelyova
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Louvain-La-Neuve, Belgium
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Corentin Jacques
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Louvain-La-Neuve, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bruno Rossion
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Louvain-La-Neuve, Belgium
- Université de Lorraine, CNRS, CRAN-UMR 7039, Nancy, France
- Université de Lorraine, CHRU-Service de Neurologie, Nancy, France
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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Pegado F, Hendriks MH, Amelynck S, Daniels N, Steyaert J, Boets B, Op de Beeck H. Adults with high functioning autism display idiosyncratic behavioral patterns, neural representations and connectivity of the ‘Voice Area’ while judging the appropriateness of emotional vocal reactions. Cortex 2020; 125:90-108. [DOI: 10.1016/j.cortex.2019.11.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 08/14/2019] [Accepted: 11/17/2019] [Indexed: 12/17/2022]
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Lee Masson H, Pillet I, Boets B, Op de Beeck H. Task-dependent changes in functional connectivity during the observation of social and non-social touch interaction. Cortex 2020; 125:73-89. [DOI: 10.1016/j.cortex.2019.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 10/18/2019] [Accepted: 12/09/2019] [Indexed: 11/17/2022]
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Sapey-Triomphe LA, Boets B, Van Eylen L, Noens I, Sunaert S, Steyaert J, Wagemans J. Ventral stream hierarchy underlying perceptual organization in adolescents with autism. Neuroimage Clin 2020; 25:102197. [PMID: 32014827 PMCID: PMC6997624 DOI: 10.1016/j.nicl.2020.102197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 01/22/2020] [Accepted: 01/24/2020] [Indexed: 11/29/2022]
Abstract
Object recognition relies on a hierarchically organized ventral visual stream, with both bottom-up and top-down processes. Here, we aimed at investigating the neural underpinnings of perceptual organization along the ventral visual stream in Autism Spectrum Disorders (ASD), and at determining whether this would be associated with decreased top-down processing in ASD. Nineteen typically developing (TD) adolescents and sixteen adolescents with ASD participated in an fMRI study where they had to detect visual objects. Five conditions displayed Gabor patterns (defined by texture and/or contour) with increasing levels of perceptual organization. In each condition, both groups showed similar abilities. In line with the expected cortical hierarchy, brain activity patterns revealed a progressive involvement of regions, from low-level occipital regions to higher-level frontal regions, when stimuli became more and more organized. The brain patterns were generally similar in both groups, but the ASD group showed greater activation than TD participants in the middle occipital gyrus and lateral occipital complex when perceiving fully organized everyday objects. Effective connectivity analyses suggested that top-down functional connections between the lower levels of the cortical hierarchy were less influenced by the meaning carried by the stimuli in the ASD group than in the TD group. We hypothesize that adolescents with ASD may have been less influenced by top-down processing when perceiving recognizable objects.
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Affiliation(s)
- Laurie-Anne Sapey-Triomphe
- Laboratory of Experimental Psychology, Department of Brain and Cognition, Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven 3000, Belgium
| | - Bart Boets
- Leuven Autism Research (LAuRes), KU Leuven, Leuven 3000, Belgium; Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7h, PB 7001, Leuven 3000, Belgium.
| | - Lien Van Eylen
- Leuven Autism Research (LAuRes), KU Leuven, Leuven 3000, Belgium; Parenting and Special Education Research Unit, KU Leuven, Leuven 3000, Belgium
| | - Ilse Noens
- Leuven Autism Research (LAuRes), KU Leuven, Leuven 3000, Belgium; Parenting and Special Education Research Unit, KU Leuven, Leuven 3000, Belgium
| | | | - Jean Steyaert
- Leuven Autism Research (LAuRes), KU Leuven, Leuven 3000, Belgium; Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7h, PB 7001, Leuven 3000, Belgium
| | - Johan Wagemans
- Laboratory of Experimental Psychology, Department of Brain and Cognition, Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven 3000, Belgium
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Bernaerts S, Boets B, Bosmans G, Steyaert J, Alaerts K. Behavioral effects of multiple-dose oxytocin treatment in autism: a randomized, placebo-controlled trial with long-term follow-up. Mol Autism 2020; 11:6. [PMID: 31969977 PMCID: PMC6964112 DOI: 10.1186/s13229-020-0313-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 01/02/2020] [Indexed: 11/14/2022] Open
Abstract
Background Intranasal administration of the "prosocial" neuropeptide oxytocin is increasingly explored as a potential treatment for targeting the core characteristics of autism spectrum disorder (ASD). However, long-term follow-up studies, evaluating the possibility of long-lasting retention effects, are currently lacking. Methods Using a double-blind, randomized, placebo-controlled, parallel design, this pilot clinical trial explored the possibility of long-lasting behavioral effects of 4 weeks of intranasal oxytocin treatment (24 International Units once daily in the morning) in 40 adult men with ASD. To do so, self-report and informant-based questionnaires assessing core autism symptoms and characterizations of attachment were administered at baseline, immediately after 4 weeks of treatment (approximately 24 h after the last nasal spray administration), and at two follow-up sessions, 4 weeks and 1 year post-treatment. Results No treatment-specific effects were identified in the primary outcome assessing social symptoms (Social Responsiveness Scale, self- and informant-rated). In particular, with respect to self-reported social responsiveness, improvements were evident both in the oxytocin and in the placebo group, yielding no significant between-group difference (p = .37). Also informant-rated improvements in social responsiveness were not significantly larger in the oxytocin, compared to the placebo group (between-group difference: p = .19). Among the secondary outcome measures, treatment-specific improvements were identified in the Repetitive Behavior Scale and State Adult Attachment Measure, indicating reductions in self-reported repetitive behaviors (p = .04) and reduced feelings of avoidance toward others (p = .03) in the oxytocin group compared to the placebo group, up to 1 month and even 1 year post-treatment. Treatment-specific effects were also revealed in screenings of mood states (Profile of Mood States), indicating higher reports of "vigor" (feeling energetic, active, lively) in the oxytocin, compared to the placebo group (p = .03). Conclusions While no treatment-specific improvements were evident in terms of core social symptoms, the current observations of long-term beneficial effects on repetitive behaviors and feelings of avoidance are promising and suggestive of a therapeutic potential of oxytocin treatment for ASD. However, given the exploratory nature of this pilot study, future studies are warranted to evaluate the long-term effects of OT administration further. Trial registration The trial was registered with the European Clinical Trial Registry (Eudract 2014-000586-45) on January 22, 2014 (https://www.clinicaltrialsregister.eu/ctr-search/trial/2014-000586-45/BE).
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Affiliation(s)
- Sylvie Bernaerts
- Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, KU Leuven, Tervuursevest 101 box 1501, 3001 Leuven, Belgium
- Leuven Autism Research consortium, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Leuven Autism Research consortium, KU Leuven, Leuven, Belgium
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, Kapucijnenvoer 7 blok h - box 7001, 3000 Leuven, Belgium
| | - Guy Bosmans
- Faculty of Psychology and Educational Sciences, Parenting and Special Education Research Group, KU Leuven, Leopold Vanderkelenstraat 32 box 3765, 3000 Leuven, Belgium
| | - Jean Steyaert
- Leuven Autism Research consortium, KU Leuven, Leuven, Belgium
- Department of Neurosciences, Center for Developmental Psychiatry, KU Leuven, O&N II Herestraat 49 box 7003, 3000 Leuven, Belgium
| | - Kaat Alaerts
- Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, KU Leuven, Tervuursevest 101 box 1501, 3001 Leuven, Belgium
- Leuven Autism Research consortium, KU Leuven, Leuven, Belgium
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Vettori S, Dzhelyova M, Van der Donck S, Jacques C, Van Wesemael T, Steyaert J, Rossion B, Boets B. Combined frequency-tagging EEG and eye tracking reveal reduced social bias in boys with autism spectrum disorder. Cortex 2019; 125:135-148. [PMID: 31982699 DOI: 10.1016/j.cortex.2019.12.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/19/2019] [Accepted: 12/16/2019] [Indexed: 12/12/2022]
Abstract
Developmental accounts of autism spectrum disorder (ASD) state that infants and children with ASD are spontaneously less attracted by and less proficient in processing social stimuli such as faces. This is hypothesized to partly underlie social communication difficulties in ASD. While in some studies a reduced preference for social stimuli has been shown in individuals with ASD, effect sizes are moderate and vary across studies, stimuli, and designs. Eye tracking, often the methodology of choice to study social preference, conveys information about overt orienting processes but conceals covert attention, possibly resulting in an underestimation of the effects. In this study, we recorded eye tracking and electroencephalography (EEG) during fast periodic visual stimulation to address this issue. We tested 21 boys with ASD (8-12 years old) and 21 typically developing (TD) control boys, matched for age and IQ. Streams of variable images of faces were presented at 6 Hz alongside images of houses presented at 7.5 Hz or vice versa, while children were engaged in an orthogonal task. While frequency-tagged neural responses were larger in response to faces than simultaneously presented houses in both groups, this effect was much larger in TD boys than in boys with ASD. This group difference in saliency of social versus non-social processing is significant after 5 sec of stimulus presentation and holds throughout the entire trial. Although there was no interaction between group and stimulus category for simultaneously recorded eye-tracking data, eye tracking and EEG measures were strongly correlated. We conclude that frequency-tagging EEG, allowing monitoring of both overt and covert processes, provides a fast, objective and reliable measure of decreased preference for social information in ASD.
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Affiliation(s)
- Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.
| | - Milena Dzhelyova
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium; Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Corentin Jacques
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium; Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium
| | - Tim Van Wesemael
- Department of Electrical Engineering (ESAT), Stadius Center for Dynamical Systems, Signal Processing and Data Analytics, Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bruno Rossion
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium; Université de Lorraine, CNRS, CRAN - UMR 7039, F-54000, Nancy, France; Université de Lorraine, CHRU-Nancy, Service de Neurologie, F-54000, France
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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Lee Masson H, Pillet I, Amelynck S, Van De Plas S, Hendriks M, Op de Beeck H, Boets B. Intact neural representations of affective meaning of touch but lack of embodied resonance in autism: a multi-voxel pattern analysis study. Mol Autism 2019; 10:39. [PMID: 31798816 PMCID: PMC6881998 DOI: 10.1186/s13229-019-0294-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 10/22/2019] [Indexed: 12/22/2022] Open
Abstract
Background Humans can easily grasp the affective meaning of touch when observing social interactions. Several neural systems support this ability, including the theory of mind (ToM) network and the somatosensory system linked to embodied resonance, but it is unclear how these systems are affected in autism spectrum disorder (ASD). Individuals with ASD exhibit impairments in the use of nonverbal communication such as social and reciprocal touch. Despite the importance of touch in social communication and the reported touch aversion in ASD, surprisingly little is known about the neural systems underlying impairments in touch communication in ASD. Methods The present study applies a dynamic and socially meaningful stimulus set combined with functional magnetic resonance imaging (fMRI) to pinpoint atypicalities in the neural circuitry underlying socio-affective touch observation in adults with ASD. Twenty-one adults with ASD and 21 matched neurotypical adults evaluated the valence and arousal of 75 video fragments displaying touch interactions. Subsequently, they underwent fMRI while watching the same videos. Using multi-voxel pattern analysis (MVPA) and multiple regression analysis, we examined which brain regions represent the socio-affective meaning of observed touch. To further understand the brain-behavior relationship, we correlated the strength of affective representations in the somatosensory cortex with individuals' attitude towards social touch in general and with a quantitative index of autism traits as measured by the Social Responsiveness Scale. Results Results revealed that the affective meaning of touch was well represented in the temporoparietal junction, a core mentalizing area, in both groups. Conversely, only the neurotypical group represented affective touch in the somatosensory cortex, a region involved in self-experienced touch. Lastly, irrespective of the group, individuals with a more positive attitude towards receiving, witnessing, and providing social touch and with a higher score on social responsivity showed more differentiated representations of the affective meaning of touch in these somatosensory areas. Conclusions Together, our findings imply that male adults with ASD show intact cognitive understanding (i.e., "knowing") of observed socio-affective touch interactions, but lack of spontaneous embodied resonance (i.e., "feeling").
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Affiliation(s)
- Haemy Lee Masson
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102, box 3714, 3000 Leuven, Belgium
- Center for Developmental Psychiatry, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research consortium, KU Leuven, 3000 Leuven, Belgium
| | - Ineke Pillet
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102, box 3714, 3000 Leuven, Belgium
| | - Steffie Amelynck
- Center for Developmental Psychiatry, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research consortium, KU Leuven, 3000 Leuven, Belgium
| | - Stien Van De Plas
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102, box 3714, 3000 Leuven, Belgium
| | - Michelle Hendriks
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102, box 3714, 3000 Leuven, Belgium
- Center for Developmental Psychiatry, KU Leuven, 3000 Leuven, Belgium
| | - Hans Op de Beeck
- Department of Brain and Cognition, KU Leuven, Tiensestraat 102, box 3714, 3000 Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, KU Leuven, 3000 Leuven, Belgium
- Leuven Autism Research consortium, KU Leuven, 3000 Leuven, Belgium
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Van der Donck S, Dzhelyova M, Vettori S, Thielen H, Steyaert J, Rossion B, Boets B. Fast Periodic Visual Stimulation EEG Reveals Reduced Neural Sensitivity to Fearful Faces in Children with Autism. J Autism Dev Disord 2019; 49:4658-4673. [PMID: 31468275 PMCID: PMC6813754 DOI: 10.1007/s10803-019-04172-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We objectively quantified the neural sensitivity of school-aged boys with and without autism spectrum disorder (ASD) to detect briefly presented fearful expressions by combining fast periodic visual stimulation with frequency-tagging electroencephalography. Images of neutral faces were presented at 6 Hz, periodically interleaved with fearful expressions at 1.2 Hz oddball rate. While both groups equally display the face inversion effect and mainly rely on information from the mouth to detect fearful expressions, boys with ASD generally show reduced neural responses to rapid changes in expression. At an individual level, fear discrimination responses predict clinical status with an 83% accuracy. This implicit and straightforward approach identifies subtle deficits that remain concealed in behavioral tasks, thereby opening new perspectives for clinical diagnosis.
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Affiliation(s)
- Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium.
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.
| | - Milena Dzhelyova
- Institute of Research in Psychological Sciences, Institute of Neuroscience, Université de Louvain, Louvain-La-Neuve, Belgium
| | - Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Hella Thielen
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bruno Rossion
- Institute of Research in Psychological Sciences, Institute of Neuroscience, Université de Louvain, Louvain-La-Neuve, Belgium
- Université de Lorraine, CNRS, CRAN, Nancy, France
- Université de Lorraine, CHRU-Nancy, Service de Neurologie, Nancy, France
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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Vettori S, Dzhelyova M, Van der Donck S, Jacques C, Steyaert J, Rossion B, Boets B. Fast periodic visual stimulation EEG reveals reduced social bias in autism. J Vis 2019. [DOI: 10.1167/19.10.25a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Milena Dzhelyova
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Corentin Jacques
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bruno Rossion
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium
- Université de Lorraine, CNRS, CRAN - UMR 7039, F-54000 Nancy, France
- Université de Lorraine, CHRU-Nancy, Service de Neurologie, F-54000, France
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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Van Overwalle J, Van der Donck S, Van de Cruys S, Boets B, Wagemans J. Fast Periodic Visual Stimulation EEG as an implicit measure for perceptual discrimination and categorization of mid-level objects. J Vis 2019. [DOI: 10.1167/19.10.128b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Jaana Van Overwalle
- Brain & Cognition Unit, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Belgiuim
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Belgiuim
| | - Sander Van de Cruys
- Brain & Cognition Unit, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Belgiuim
| | - Bart Boets
- Center for Developmental Psychiatry, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Belgiuim
| | - Johan Wagemans
- Brain & Cognition Unit, KU Leuven, Belgium
- Leuven Autism Research (LAuRes), KU Leuven, Belgiuim
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Vandermosten M, Boets B, Wouters J, Ghesquière P. Corrigendum to "A qualitative and quantitative review of diffusion tensor imaging studies in reading and dyslexia" [Neurosci. Biobehav. Rev. 36 (2012), 1532-1552]. Neurosci Biobehav Rev 2019; 98:334. [PMID: 30642658 DOI: 10.1016/j.neubiorev.2018.12.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Maaike Vandermosten
- Laboratory for Experimental ORL, KU Leuven, Herestraat 49, 3000, Leuven, Belgium.
| | - Bart Boets
- Child Psychiatry, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Jan Wouters
- Laboratory for Experimental ORL, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Pol Ghesquière
- Parenting and Special Education Research Unit, KU Leuven, L. Vanderkelenstraat 32, 3000, Leuven, Belgium
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Vettori S, Dzhelyova M, Van der Donck S, Jacques C, Steyaert J, Rossion B, Boets B. Reduced neural sensitivity to rapid individual face discrimination in autism spectrum disorder. Neuroimage Clin 2018; 21:101613. [PMID: 30522972 PMCID: PMC6411619 DOI: 10.1016/j.nicl.2018.101613] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 11/07/2018] [Accepted: 11/20/2018] [Indexed: 12/18/2022]
Abstract
Background Individuals with autism spectrum disorder (ASD) are characterized by impairments in social communication and interaction. Although difficulties at processing social signals from the face in ASD have been observed and emphasized for many years, there is a lot of inconsistency across both behavioral and neural studies. Methods We recorded scalp electroencephalography (EEG) in 23 8-to-12 year old boys with ASD and 23 matched typically developing boys using a fast periodic visual stimulation (FPVS) paradigm, providing objective (i.e., frequency-tagged), fast (i.e., few minutes) and highly sensitive measures of rapid face categorization, without requiring any explicit face processing task. We tested both the sensitivity to rapidly (i.e., at a glance) categorize faces among other objects and to individuate unfamiliar faces. Outcomes While general neural synchronization to the visual stimulation and neural responses indexing generic face categorization were undistinguishable between children with ASD and typically developing controls, neural responses indexing individual face discrimination over the occipito-temporal cortex were substantially reduced in the individuals with ASD. This difference vanished when faces were presented upside-down, due to the lack of significant face inversion effect in ASD. Interpretation These data provide original evidence for a selective high-level impairment in individual face discrimination in ASD in an implicit task. The objective and rapid assessment of this function opens new perspectives for ASD diagnosis in clinical settings. We assess implicit face processing in ASD via Fast Periodic Visual Stimulation EEG. Rapid categorization of a face as a face is not impaired in children with ASD. Individual face discrimination is selectively impaired in ASD. Children with ASD show no face inversion effect. FPVS-EEG opens new perspectives for clinical settings.
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Affiliation(s)
- Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.
| | - Milena Dzhelyova
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Louvain-La-Neuve, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Corentin Jacques
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium; Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Louvain-La-Neuve, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bruno Rossion
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Louvain-La-Neuve, Belgium; Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France; Université de Lorraine, CHRU-Nancy, Service de Neurologie, F-5400, France
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium; Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.
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Vettori S, Dzhelyova M, Van der Donck S, Jacques C, Steyaert J, Rossion B, Boets B. Reduced neural sensitivity for implicit individual face discrimination in autism. J Vis 2018. [DOI: 10.1167/18.10.712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Sofie Vettori
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, BelgiumLeuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Milena Dzhelyova
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium
| | - Stephanie Van der Donck
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, BelgiumLeuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Corentin Jacques
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium
| | - Jean Steyaert
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, BelgiumLeuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bruno Rossion
- Institute of Research in Psychological Science, Institute of Neuroscience, University of Louvain, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, BelgiumLeuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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Pegado F, Hendriks MHA, Amelynck S, Daniels N, Bulthé J, Masson HL, Boets B, de Beeck HO. Neural Representations Behind 'Social Norm' Inferences In Humans. Sci Rep 2018; 8:12943. [PMID: 30154471 PMCID: PMC6113313 DOI: 10.1038/s41598-018-31260-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 08/08/2018] [Indexed: 11/09/2022] Open
Abstract
Humans are highly skilled in social reasoning, e.g., inferring thoughts of others. This mentalizing ability systematically recruits brain regions such as Temporo-Parietal Junction (TPJ), Precuneus (PC) and medial Prefrontal Cortex (mPFC). Further, posterior mPFC is associated with allocentric mentalizing and conflict monitoring while anterior mPFC is associated with self-reference (egocentric) processing. Here we extend this work to how we reason not just about what one person thinks but about the abstract shared social norm. We apply functional magnetic resonance imaging to investigate neural representations while participants judge the social congruency between emotional auditory utterances in relation to visual scenes according to how ‘most people’ would perceive it. Behaviorally, judging according to a social norm increased the similarity of response patterns among participants. Multivoxel pattern analysis revealed that social congruency information was not represented in visual and auditory areas, but was clear in most parts of the mentalizing network: TPJ, PC and posterior (but not anterior) mPFC. Furthermore, interindividual variability in anterior mPFC representations was inversely related to the behavioral ability to adjust to the social norm. Our results suggest that social norm inferencing is associated with a distributed and partially individually specific representation of social congruency in the mentalizing network.
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Affiliation(s)
- Felipe Pegado
- Department of Brain and Cognition, KU Leuven, 3000, Leuven, Belgium. .,Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000, Leuven, Belgium. .,Leuven Autism Research consortium, KU Leuven, 3000, Leuven, Belgium.
| | - Michelle H A Hendriks
- Department of Brain and Cognition, KU Leuven, 3000, Leuven, Belgium.,Leuven Autism Research consortium, KU Leuven, 3000, Leuven, Belgium
| | - Steffie Amelynck
- Department of Brain and Cognition, KU Leuven, 3000, Leuven, Belgium
| | - Nicky Daniels
- Department of Brain and Cognition, KU Leuven, 3000, Leuven, Belgium
| | - Jessica Bulthé
- Department of Brain and Cognition, KU Leuven, 3000, Leuven, Belgium
| | - Haemy Lee Masson
- Department of Brain and Cognition, KU Leuven, 3000, Leuven, Belgium
| | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, 3000, Leuven, Belgium.,Leuven Autism Research consortium, KU Leuven, 3000, Leuven, Belgium
| | - Hans Op de Beeck
- Department of Brain and Cognition, KU Leuven, 3000, Leuven, Belgium.
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Pegado F, Hendriks MHA, Amelynck S, Daniels N, Bulthé J, Lee Masson H, Boets B, Op de Beeck H. A Multitude of Neural Representations Behind Multisensory "Social Norm" Processing. Front Hum Neurosci 2018; 12:153. [PMID: 29740297 PMCID: PMC5924771 DOI: 10.3389/fnhum.2018.00153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 04/05/2018] [Indexed: 01/10/2023] Open
Abstract
Humans show a unique capacity to process complex information from multiple sources. Social perception in natural environment provides a good example of such capacity as it typically requires the integration of information from different sensory systems, and also from different levels of sensory processing. Here, instead of studying one isolate system and level of representation, we focused upon a neuroimaging paradigm which allows to capture multiple brain representations simultaneously, i.e., low and high-level processing in two different sensory systems, as well as abstract cognitive processing of congruency. Subjects performed social decisions based on the congruency between auditory and visual processing. Using multivoxel pattern analysis (MVPA) of functional magnetic resonance imaging (fMRI) data, we probed a wide variety of representations. Our results confirmed the expected representations at each level and system according to the literature. Further, beyond the hierarchical organization of the visual, auditory and higher order neural systems, we provide a more nuanced picture of the brain functional architecture. Indeed, brain regions of the same neural system show similarity in their representations, but they also share information with regions from other systems. Further, the strength of neural information varied considerably across domains in a way that was not obviously related to task relevance. For instance, selectivity for task-irrelevant animacy of visual input was very strong. The present approach represents a new way to explore the richness of co-activated brain representations underlying the natural complexity in human cognition.
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Affiliation(s)
- Felipe Pegado
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium.,Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium
| | - Michelle H A Hendriks
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium.,Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium
| | | | - Nicky Daniels
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
| | - Jessica Bulthé
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
| | | | - Bart Boets
- Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Leuven Autism Research Consortium, KU Leuven, Leuven, Belgium
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Boets B, Van Eylen L, Sitek K, Moors P, Noens I, Steyaert J, Sunaert S, Wagemans J. Alterations in the inferior longitudinal fasciculus in autism and associations with visual processing: a diffusion-weighted MRI study. Mol Autism 2018; 9:10. [PMID: 29449909 PMCID: PMC5806238 DOI: 10.1186/s13229-018-0188-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 01/10/2018] [Indexed: 11/10/2022] Open
Abstract
Background One of the most reported neural features of autism spectrum disorder (ASD) is the alteration of multiple long-range white matter fiber tracts, as assessed by diffusion-weighted imaging and indexed by reduced fractional anisotropy (FA). Recent methodological advances, however, have shown that this same pattern of reduced FA may be an artifact resulting from excessive head motion and poorer data quality and that aberrant structural connectivity in children with ASD is confined to the right inferior longitudinal fasciculus (ILF). This study aimed at replicating the observation of reduced FA along the right ILF in ASD, while controlling for group differences in head motion and data quality. In addition, we explored associations between reduced FA in the right ILF and quantitative ASD characteristics, and the involvement of the right ILF in visual processing, which is known to be altered in ASD. Method Global probabilistic tractography was performed on diffusion-weighted imaging data of 17 adolescent boys with ASD and 17 typically developing boys, matched for age, performance IQ, handedness, and data quality. Four tasks were administered to measure various aspects of visual information processing, together with questionnaires assessing ASD characteristics. Group differences were examined and the neural data were integrated with previously published findings using Bayesian statistics to quantify evidence for replication and to pool data and thus increase statistical power. (Partial) correlations were calculated to investigate associations between measures. Results The ASD group showed consistently reduced FA only in the right ILF and slower performance on the visual search task. Bayesian statistics pooling data across studies confirmed that group differences in FA were confined to the right ILF only, with the evidence for altered FA in the left ILF being indecisive. Lower FA in the right ILF tended to covary with slower visual search and a more fragmented part-oriented processing style. Individual differences in FA of the right ILF were not reliably associated with the severity of ASD traits after controlling for clinical status. Conclusion Our findings support the growing evidence for reduced FA along a specific fiber tract in ASD, the right ILF.
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Affiliation(s)
- Bart Boets
- 1Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7h, PB 7001, 3000 Leuven, Belgium.,2Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium.,3Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139 USA
| | - Lien Van Eylen
- 1Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7h, PB 7001, 3000 Leuven, Belgium.,2Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
| | - Kevin Sitek
- 3Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139 USA.,4Speech and Hearing Bioscience and Technology, Division of Medical Sciences, Harvard Medical School, Boston, MA 02115 USA
| | - Pieter Moors
- 5Laboratory of Experimental Psychology, KU Leuven, 3000 Leuven, Belgium
| | - Ilse Noens
- 6Parenting and Special Education Research Unit, KU Leuven, 3000 Leuven, Belgium
| | - Jean Steyaert
- 1Center for Developmental Psychiatry, Department of Neurosciences, KU Leuven, Kapucijnenvoer 7h, PB 7001, 3000 Leuven, Belgium.,2Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium
| | | | - Johan Wagemans
- 2Leuven Autism Research (LAuRes), KU Leuven, 3000 Leuven, Belgium.,5Laboratory of Experimental Psychology, KU Leuven, 3000 Leuven, Belgium
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Van Eylen L, Plasschaert E, Wagemans J, Boets B, Legius E, Steyaert J, Noens I. Visuoperceptual processing in children with neurofibromatosis type 1: True deficit or artefact? Am J Med Genet B Neuropsychiatr Genet 2017; 174:342-358. [PMID: 28512747 DOI: 10.1002/ajmg.b.32522] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 12/12/2016] [Indexed: 12/21/2022]
Abstract
Impairments in visuoperceptual processing have long been considered a hallmark deficit of individuals with Neurofibromatosis type 1 (NF1). However, it is unclear which specific visuoperceptual subprocesses are impaired and whether impairments on these tasks really result from visuoperceptual impairments or rather from confounding factors like Executive Functioning (EF) impairments, lower intelligence (IQ) and/or co-occurring symptoms of Autism Spectrum Disorder (ASD). To answer these questions, we administered four visuoperceptual tasks and two control tasks in 39 children with NF1, 52 typically developing children and 52 children with ASD (8-18 years), all matched for age and gender. Furthermore, EF, IQ, and symptoms of ASD were assessed. Children with NF1 displayed intact visual form discrimination and intact information integration along the dorsal visual pathway. Moreover, their reduced performance on a task requiring integration of information along the ventral visual stream and their more detail-oriented processing style appeared to result from confounding EF impairments and not from visuoperceptual impairments per se. The co-occurring ASD symptoms and lower IQ of the children with NF1 did not impact substantially upon their visuoperceptual performance. These findings point to the large impact of EF impairments on the performance of visuoperceptual task and suggest that individuals with NF1 show intact visual form discrimination, intact visual integration, and typical visual processing style when potential confounding factors are controlled for. This may have large repercussions for the interpretation of other findings on visuoperceptual processing in individuals with NF1. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Lien Van Eylen
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Parenting and Special Education Research Unit, KU Leuven, Leuven, Belgium.,Research Group Psychiatry, UPC-KU Leuven, Leuven, Belgium
| | - Ellen Plasschaert
- Department of Human Genetics, KU Leuven, Leuven, Belgium.,Center for Human Genetics, University Hospital Leuven, Leuven, Belgium
| | - Johan Wagemans
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Brain and Cognition, KU Leuven, Leuven, Belgium
| | - Bart Boets
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Research Group Psychiatry, UPC-KU Leuven, Leuven, Belgium
| | - Eric Legius
- Department of Human Genetics, KU Leuven, Leuven, Belgium.,Center for Human Genetics, University Hospital Leuven, Leuven, Belgium
| | - Jean Steyaert
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Department of Child Psychiatry, UPC-KU Leuven, Leuven, Belgium.,Department of Clinical Genetics, University Hospital Maastricht, Maastricht, the Netherlands
| | - Ilse Noens
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Parenting and Special Education Research Unit, KU Leuven, Leuven, Belgium
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Van Eylen L, Boets B, Cosemans N, Peeters H, Steyaert J, Wagemans J, Noens I. Executive functioning and local-global visual processing: candidate endophenotypes for autism spectrum disorder? J Child Psychol Psychiatry 2017; 58:258-269. [PMID: 27804132 DOI: 10.1111/jcpp.12637] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/19/2016] [Indexed: 01/19/2023]
Abstract
BACKGROUND Heterogeneity within autism spectrum disorder (ASD) hampers insight in the etiology and stimulates the search for endophenotypes. Endophenotypes should meet several criteria, the most important being the association with ASD and the higher occurrence rate in unaffected ASD relatives than in the general population. We evaluated these criteria for executive functioning (EF) and local-global (L-G) visual processing. METHODS By administering an extensive cognitive battery which increases the validity of the measures, we examined which of the cognitive anomalies shown by ASD probands also occur in their unaffected relatives (n = 113) compared to typically developing (TD) controls (n = 100). Microarrays were performed, so we could exclude relatives from probands with a de novo mutation in a known ASD susceptibility copy number variant, thus increasing the probability that genetic risk variants are shared by the ASD relatives. An overview of studies investigating EF and L-G processing in ASD relatives was also provided. RESULTS For EF, ASD relatives - like ASD probands - showed impairments in response inhibition, cognitive flexibility and generativity (specifically, ideational fluency), and EF impairments in daily life. For L-G visual processing, the ASD relatives showed no anomalies on the tasks, but they reported more attention to detail in daily life. Group differences were similar for siblings and for parents of ASD probands, and yielded larger effect sizes in a multiplex subsample. The group effect sizes for the comparison between ASD probands and TD individuals were generally larger than those of the ASD relatives compared to TD individuals. CONCLUSIONS Impaired cognitive flexibility, ideational fluency and response inhibition are strong candidate endophenotypes for ASD. They could help to delineate etiologically more homogeneous subgroups, which is clinically important to allow assigning ASD probands to different, more targeted, interventions.
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Affiliation(s)
- Lien Van Eylen
- Parenting and Special Education Research Unit, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | - Bart Boets
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Child and Adolescent Psychiatry, UPC-KU Leuven, Leuven, Belgium
| | - Nele Cosemans
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Center for Human Genetics, University Hospital Leuven, KU Leuven, Leuven, Belgium
| | - Hilde Peeters
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Center for Human Genetics, University Hospital Leuven, KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Child and Adolescent Psychiatry, UPC-KU Leuven, Leuven, Belgium
| | - Johan Wagemans
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Brain & Cognition, KU Leuven, Leuven, Belgium
| | - Ilse Noens
- Parenting and Special Education Research Unit, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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Van de Cruys S, Evers K, Van der Hallen R, Van Eylen L, Boets B, de-Wit L, Wagemans J. Precise minds in uncertain worlds: predictive coding in autism. Psychol Rev 2015; 121:649-75. [PMID: 25347312 DOI: 10.1037/a0037665] [Citation(s) in RCA: 432] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
There have been numerous attempts to explain the enigma of autism, but existing neurocognitive theories often provide merely a refined description of 1 cluster of symptoms. Here we argue that deficits in executive functioning, theory of mind, and central coherence can all be understood as the consequence of a core deficit in the flexibility with which people with autism spectrum disorder can process violations to their expectations. More formally we argue that the human mind processes information by making and testing predictions and that the errors resulting from violations to these predictions are given a uniform, inflexibly high weight in autism spectrum disorder. The complex, fluctuating nature of regularities in the world and the stochastic and noisy biological system through which people experience it require that, in the real world, people not only learn from their errors but also need to (meta-)learn to sometimes ignore errors. Especially when situations (e.g., social) or stimuli (e.g., faces) become too complex or dynamic, people need to tolerate a certain degree of error in order to develop a more abstract level of representation. Starting from an inability to flexibly process prediction errors, a number of seemingly core deficits become logically secondary symptoms. Moreover, an insistence on sameness or the acting out of stereotyped and repetitive behaviors can be understood as attempts to provide a reassuring sense of predictive success in a world otherwise filled with error. (PsycINFO Database Record (c) 2014 APA, all rights reserved).
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Affiliation(s)
| | - Kris Evers
- Laboratory of Experimental Psychology, Leuven Autism Research, KU Leuven
| | | | | | | | - Lee de-Wit
- Laboratory of Experimental Psychology, KU Leuven
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Boets B, Verhoeven J, Wouters J, Steyaert J. Fragile spectral and temporal auditory processing in adolescents with autism spectrum disorder and early language delay. J Autism Dev Disord 2015; 45:1845-57. [PMID: 25503681 DOI: 10.1007/s10803-014-2341-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We investigated low-level auditory spectral and temporal processing in adolescents with autism spectrum disorder (ASD) and early language delay compared to matched typically developing controls. Auditory measures were designed to target right versus left auditory cortex processing (i.e. frequency discrimination and slow amplitude modulation (AM) detection versus gap-in-noise detection and faster AM detection), and to pinpoint the task and stimulus characteristics underlying putative superior spectral processing in ASD. We observed impaired frequency discrimination in the ASD group and suggestive evidence of poorer temporal resolution as indexed by gap-in-noise detection thresholds. These findings question the evidence of enhanced spectral sensitivity in ASD and do not support the hypothesis of superior right and inferior left hemispheric auditory processing in ASD.
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Affiliation(s)
- Bart Boets
- Child and Adolescent Psychiatry, Department of Neurosciences, University of Leuven (KU Leuven), Herestraat 49, Box 7003, 3000, Leuven, Belgium,
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Van Eylen L, Boets B, Steyaert J, Wagemans J, Noens I. Executive functioning in autism spectrum disorders: influence of task and sample characteristics and relation to symptom severity. Eur Child Adolesc Psychiatry 2015; 24:1399-417. [PMID: 25697266 DOI: 10.1007/s00787-015-0689-1] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 01/28/2015] [Indexed: 01/17/2023]
Abstract
Impaired executive functioning (EF) has been proposed to underlie symptoms of autism spectrum disorders (ASD). However, insight in the EF profile of ASD individuals is hampered due to task impurity and inconsistent findings. To elucidate these inconsistencies, we investigated the influence of task and sample characteristics on EF in ASD, with an extended test battery designed to reduce task impurity. Additionally, we studied the relation between EF and ASD symptoms. EF (inhibition, cognitive flexibility, generativity, working memory and planning) was measured in open-ended versus structured assessment situations, while controlling for possible confounding EF and non-EF variables. The performance of 50 individuals with ASD was compared with that of 50 age, gender and IQ matched typically developing (TD) individuals. The effects of group (ASD versus TD), age (children versus adolescents) and gender were examined, as well as the correlation between age, IQ, ASD symptoms and EF. Individuals with ASD showed impairments in all EF domains, but deficits were more pronounced in open-ended compared to structured settings. Group differences did not depend on gender and only occasionally on participants' age. This suggests that inconsistencies between studies largely result from differences in task characteristics and less from differences in the investigated sample features. However, age and IQ strongly correlated with EF, indicating that group differences in these factors should be controlled for when studying EF. Finally, EF correlated with both social and non-social ASD symptoms, but further research is needed to clarify the nature of this relationship.
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Affiliation(s)
- Lien Van Eylen
- Parenting and Special Education Research Unit, KU Leuven, Leopold Vanderkelenstraat 32, Box 3765, 3000, Leuven, Belgium. .,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.
| | - Bart Boets
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Department of Child Psychiatry, UPC-KU Leuven, Leuven, Belgium
| | - Jean Steyaert
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Department of Child Psychiatry, UPC-KU Leuven, Leuven, Belgium.,Department of Clinical Genetics, University Hospital Maastricht, Maastricht, The Netherlands
| | - Johan Wagemans
- Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Laboratory of Experimental Psychology, KU Leuven, Leuven, Belgium
| | - Ilse Noens
- Parenting and Special Education Research Unit, KU Leuven, Leopold Vanderkelenstraat 32, Box 3765, 3000, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium.,Psychiatric and Neurodevelopmental Genetics Unit, Massachusetts General Hospital, Boston, USA
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