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Kattlun F, Hertel E, Geis C, Scherag A, Wickel J, Finke K. Persistent neurocognitive deficits in cognitively impaired survivors of sepsis are explained by reductions in working memory capacity. Front Psychol 2024; 15:1321145. [PMID: 38449763 PMCID: PMC10915060 DOI: 10.3389/fpsyg.2024.1321145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 02/08/2024] [Indexed: 03/08/2024] Open
Abstract
Introduction Sepsis is defined as life-threatening organ dysfunction caused by a dysregulated host response to infection. Mounting evidence suggests that many cognitively impaired sepsis survivors show long-term neurocognitive deficits in neuropsychological tasks. To date, the underlying mechanisms of these deficits are insufficiently understood. Based on previous evaluations we hypothesized that visual attention and working memory may be affected in a sample of cognitively impaired sepsis survivors. Methods We utilized psychophysical whole-and partial-report paradigms based on the computational theory of visual attention (TVA) to determine (i) whether sepsis survivors show changes in basic parameters of visual attention and working memory, (ii) whether the affected parameters are related to neuropsychological test results in a standard battery in sepsis survivors and matched healthy control participants, (iii) whether between-group differences in these basic parameters of visual attention could account for underperformance of sepsis survivors in neuropsychological tests when adjusting for potentially relevant clinical variables. Results We showed that, in sepsis survivors, the maximum number of elements consciously maintained in an instant, i.e. the working memory storage capacity K, is reduced (sepsis survivors: M = 3.0; healthy controls: M = 3.4). Moreover, K explained variance in neurocognitive outcomes -17% in attentional and 16 % in executive functions - in a standard neuropsychological battery. The association remained stable when adjusting for clinical variables. Discussion Thus, in our sample of cognitively impaired sepsis survivors, a reduction in working memory capacity seems to be a critical determinant of the neurocognitive sequelae. It should be the subject of future work on mechanisms but may also serve as surrogate outcome measure in interventional studies.
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Affiliation(s)
- Fabian Kattlun
- Department of Neurology, Jena University Hospital - Friedrich Schiller University, Jena, Germany
- Center for Sepsis Control and Care, Jena University Hospital - Friedrich Schiller University, Jena, Germany
| | - Elizabeth Hertel
- Department of Neurology, Jena University Hospital - Friedrich Schiller University, Jena, Germany
- Center for Sepsis Control and Care, Jena University Hospital - Friedrich Schiller University, Jena, Germany
| | - Christian Geis
- Center for Sepsis Control and Care, Jena University Hospital - Friedrich Schiller University, Jena, Germany
- Section Translational Neuroimmunology, Department of Neurology, Jena University Hospital - Friedrich Schiller University, Jena, Germany
| | - André Scherag
- Center for Sepsis Control and Care, Jena University Hospital - Friedrich Schiller University, Jena, Germany
- Institute of Medical Statistics, Computer and Data Sciences, Jena University Hospital - Friedrich Schiller University, Jena, Germany
| | - Jonathan Wickel
- Center for Sepsis Control and Care, Jena University Hospital - Friedrich Schiller University, Jena, Germany
- Section Translational Neuroimmunology, Department of Neurology, Jena University Hospital - Friedrich Schiller University, Jena, Germany
| | - Kathrin Finke
- Department of Neurology, Jena University Hospital - Friedrich Schiller University, Jena, Germany
- Center for Sepsis Control and Care, Jena University Hospital - Friedrich Schiller University, Jena, Germany
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Nuernberger M, Finke K, Nuernberger L, Ruiz-Rizzo AL, Gaser C, Klingner C, Witte OW, Brodoehl S. Visual stimulation by extensive visual media consumption can be beneficial for motor learning. Sci Rep 2023; 13:22056. [PMID: 38086999 PMCID: PMC10716399 DOI: 10.1038/s41598-023-49415-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 12/07/2023] [Indexed: 12/18/2023] Open
Abstract
In this randomized controlled intervention trial, we investigated whether intense visual stimulation through television watching can enhance visual information processing and motor learning performance. 74 healthy young adults were trained in a motor skill with visual information processing demands while being accommodated in a controlled environment for five days. The experimental manipulation (n = 37) consisted of prolonged television watching (i.e., 8 h/day, + 62.5% on average) to induce intense exposure to visual stimulation. The control group (n = 37) did not consume visual media. The groups were compared by motor learning performance throughout the study as well as pre/post visual attention parameters and resting-state network connectivity in functional MRI. We found that the intervention group performed significantly better in the motor learning task (+ 8.21% (95%-CI[12.04, 4.31], t(70) = 4.23, p < 0.001) while showing an increased capacity of visual short-term memory (+ 0.254, t(58) = - 3.19, p = 0.002) and increased connectivity between visual and motor-learning associated resting-state networks. Our findings suggest that the human brain might enter a state of accentuated visuomotor integration to support the implementation of motor learning with visual information processing demands if challenged by ample input of visual stimulation. Further investigation is needed to evaluate the persistence of this effect regarding participants exposed to accustomed amounts of visual media consumption.Clinical Trials Registration: This trial was registered in the German Clinical Trials Register/Deutsches Register klinischer Studien (DRKS): DRKS00019955.
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Affiliation(s)
- Matthias Nuernberger
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany.
- Biomagnetic Center, Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany.
| | - Kathrin Finke
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | - Lisa Nuernberger
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
- Biomagnetic Center, Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | - Adriana L Ruiz-Rizzo
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | - Christian Gaser
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
- Biomagnetic Center, Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
- German Center for Mental Health (DZPG), Department of Psychiatry and Psychotherapy, Jena University Hospital, Jena, Germany
| | - Carsten Klingner
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
- Biomagnetic Center, Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | - Otto W Witte
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | - Stefan Brodoehl
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
- Biomagnetic Center, Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
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Ren X, Li J, Liu J, Liu D, Zhao J. Intervention targeting different visual attention span components in Chinese children with developmental dyslexia: a study based on Bundesen's theory of visual attention. ANNALS OF DYSLEXIA 2023; 73:487-509. [PMID: 37422551 DOI: 10.1007/s11881-023-00288-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 07/02/2023] [Indexed: 07/10/2023]
Abstract
Within the framework of the theory of visual attention (TVA), the visual attention span (VAS) deficit among individuals with developmental dyslexia has been ascribed to the problems entailed by bottom-up (BotU) and top-down (TopD) attentional processes. The former involves two VAS subcomponents: the visual short-term memory storage and perceptual processing speed; the latter consists of the spatial bias of attentional weight and the inhibitory control. Then, what about the influences of the BotU and TopD components on reading? Are there differences in the roles of the two types of attentional processes in reading? This study addresses these issues by using two types of training tasks separately, corresponding to the BotU and TopD attentional components. Three groups of Chinese children with dyslexia-15 children each in the BotU training, TopD training, and non-trained active control groups were recruited here. Participants completed reading measures and a CombiTVA task which was used to estimate VAS subcomponents, before and after the training procedure. Results showed that BotU training improved both the within-category and between-category VAS subcomponents and sentence reading performance; meanwhile, TopD training enhanced character reading fluency through improving spatial attention capacity. Moreover, benefits on attentional capacities and reading skills in the two training groups were generally maintained three months after the intervention. The present findings revealed diverse patterns in the influences of VAS on reading within the TVA framework, which contributes to enriching the understanding of VAS-reading relation.
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Affiliation(s)
- Xiaoyu Ren
- Key Laboratory of Learning and Cognition, School of Psychology, Capital Normal University, Beijing, China
| | - Jie Li
- Key Laboratory of Learning and Cognition, School of Psychology, Capital Normal University, Beijing, China
| | - Jinqiu Liu
- Key Laboratory of Learning and Cognition, School of Psychology, Capital Normal University, Beijing, China
| | - Duo Liu
- Department of Special Education and Counselling, The Education University of Hong Kong, Hong Kong, SAR, China.
| | - Jing Zhao
- Key Laboratory of Learning and Cognition, School of Psychology, Capital Normal University, Beijing, China.
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Steinhilber A, Diard J, Ginestet E, Valdois S. Visual attention modulates the transition from fine-grained, serial processing to coarser-grained, more parallel processing: A computational modeling study. Vision Res 2023; 207:108211. [PMID: 36990012 DOI: 10.1016/j.visres.2023.108211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 12/05/2022] [Accepted: 12/13/2022] [Indexed: 03/29/2023]
Abstract
During reading acquisition, beginning readers transition from serial to more parallel processing. The acquisition of word specific knowledge through orthographic learning is critical for this transition. However, the processes by which orthographic representations are acquired and fine-tuned as learning progresses are not well understood. Our aim was to explore the role of visual attention in this transition through computational modeling. We used the BRAID-Learn model, a Bayesian model of visual word recognition, to simulate the orthographic learning of 700 4-to 10-letter English known words and novel words, presented 5 times each to the model. The visual attention quantity available for letter identification was manipulated in the simulations to assess its influence on the learning process. We measured the overall processing time and number of attentional fixations simulated by the model across exposures and their impact on two markers of serial processing, the lexicality and length effects, depending on visual attention quantity. Results showed that the two lexicality and length effects were modulated by visual attention quantity. The quantity of visual attention available for processing further modulated novel word orthographic learning and the evolution of the length effect on processing time and number of attentional fixations across repeated exposures to novel words. The simulated patterns are consistent with behavioral data and the developmental trajectories reported during reading acquisition. Overall, the model predicts that the efficacy of orthographic learning depends on visual attention quantity and that visual attention may be critical to explain the transition from serial to more parallel processing.
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Affiliation(s)
- Alexandra Steinhilber
- Laboratoire de Psychologie et NeuroCognition, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LPNC, 38000 Grenoble, France
| | - Julien Diard
- Laboratoire de Psychologie et NeuroCognition, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LPNC, 38000 Grenoble, France.
| | - Emilie Ginestet
- Laboratoire de Psychologie et NeuroCognition, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LPNC, 38000 Grenoble, France
| | - Sylviane Valdois
- Laboratoire de Psychologie et NeuroCognition, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LPNC, 38000 Grenoble, France
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Hervig MES, Toschi C, Petersen A, Vangkilde S, Gether U, Robbins TW. Theory of visual attention (TVA) applied to rats performing the 5-choice serial reaction time task: differential effects of dopaminergic and noradrenergic manipulations. Psychopharmacology (Berl) 2023; 240:41-58. [PMID: 36434307 PMCID: PMC9816296 DOI: 10.1007/s00213-022-06269-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 10/21/2022] [Indexed: 11/27/2022]
Abstract
RATIONALE Attention is compromised in many psychiatric disorders, including attention-deficit/hyperactivity disorder (ADHD). While dopamine and noradrenaline systems have been implicated in ADHD, their exact role in attentional processing is yet unknown. OBJECTIVES We applied the theory of visual attention (TVA) model, adapted from human research, to the rat 5-choice serial reaction time task (5CSRTT) to investigate catecholaminergic modulation of visual attentional processing in healthy subjects of high- and low-attention phenotypes. METHODS Rats trained on the standard 5CSRTT and tested with variable stimulus durations were treated systemically with noradrenergic and/or dopaminergic agents (atomoxetine, methylphenidate, amphetamine, phenylephrine and atipamezole). TVA modelling was applied to estimate visual processing speed for correct and incorrect visual perceptual categorisations, independent of motor reaction times, as measures of attentional capacity. RESULTS Atomoxetine and phenylephrine decreased response frequencies, including premature responses, increased omissions and slowed responding. In contrast, methylphenidate, amphetamine and atipamezole sped up responding and increased premature responses. Visual processing speed was also affected differentially. Atomoxetine and phenylephrine slowed, whereas methylphenidate and atipamezole sped up, visual processing, both for correct and incorrect categorisations. Amphetamine selectively improved visual processing for correct, though not incorrect, responses in high-attention rats only, possibly reflecting improved attention. CONCLUSIONS These data indicate that the application of TVA to the 5CSRTT provides an enhanced sensitivity to capturing attentional effects. Unexpectedly, we found overall slowing effects, including impaired visual processing, following drugs either increasing extracellular noradrenaline (atomoxetine) or activating the α1-adrenoceptor (phenylephrine), while also ameliorating premature responses (impulsivity). In contrast, amphetamine had potential pro-attentional effects by enhancing visual processing, probably due to central dopamine upregulation.
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Affiliation(s)
- Mona El-Sayed Hervig
- Department of Psychology and Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK. .,Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark.
| | - Chiara Toschi
- Department of Psychology and Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - Anders Petersen
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Signe Vangkilde
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Ulrik Gether
- Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | - Trevor W. Robbins
- Department of Psychology and Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
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Valdois S. The visual-attention span deficit in developmental dyslexia: Review of evidence for a visual-attention-based deficit. DYSLEXIA (CHICHESTER, ENGLAND) 2022; 28:397-415. [PMID: 35903834 DOI: 10.1002/dys.1724] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 04/07/2022] [Accepted: 07/13/2022] [Indexed: 06/15/2023]
Abstract
The visual attention span (VAS) deficit hypothesis in developmental dyslexia posits that a subset of dyslexic individuals shows a multielement parallel processing deficit due to reduced visual attention capacity. However, the attention-based interpretation of poor performance on VAS tasks is hotly debated. The purpose of the present paper is to clarify this issue through a critical review of relevant behavioural and neurobiological findings. We first examine the plausibility of alternative verbal interpretations of VAS performance, evaluating whether performance on VAS tasks might reflect verbal short-term memory, verbal coding or visual-to-verbal mapping skills. We then focus on the visual dimensions of VAS tasks to question whether VAS primarily reflects visuo-attentional rather than more basic visual skills. Scrutiny of the available behavioural and neurobiological findings not only points to a deficit of visual attention in dyslexic individuals with impaired VAS but further suggests a selective endogenous attentional system deficit that relates to atypical functioning of the brain dorsal attentional network. The overview clarifies the debate on what is being measured through VAS tasks and provides insights on how to interpret the VAS deficit in developmental dyslexia.
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7
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The Value of Bayesian Methods for Accurate and Efficient Neuropsychological Assessment. J Int Neuropsychol Soc 2022; 28:984-995. [PMID: 34665083 DOI: 10.1017/s1355617721001120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Clinical neuropsychology has been slow in adopting novelties in psychometrics, statistics, and technology. Researchers have indicated that the stationary nature of clinical neuropsychology endangers its evidence-based character. In addition to a technological crisis, there may be a statistical crisis affecting clinical neuropsychology. That is, the frequentist null hypothesis significance testing framework remains the dominant approach in clinical practice, despite a recent surge in critique on this framework. While the Bayesian framework has been put forward as a viable alternative in psychology in general, the possibilities it offers to clinical neuropsychology have not received much attention. METHOD In the current position paper, we discuss and reflect on the value of Bayesian methods for the advancement of evidence-based clinical neuropsychology. RESULTS We aim to familiarize clinical neuropsychologists and neuropsychological researchers to Bayesian methods of inference and provide a clear rationale for why these methods are valuable for clinical neuropsychology. CONCLUSION We argue that Bayesian methods allow for a more intuitive answer to our diagnostic questions and form a more solid foundation for sequential and adaptive diagnostic testing, representing uncertainty about patients' observed test scores and cognitive modeling of test results.
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Tünnermann J, Kristjánsson Á, Petersen A, Schubö A, Scharlau I. Advances in the application of a computational Theory of Visual Attention (TVA): Moving towards more naturalistic stimuli and game-like tasks. OPEN PSYCHOLOGY 2022. [DOI: 10.1515/psych-2022-0002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
The theory of visual attention, “TVA”, is an influential and formal theory of attentional selection. It is widely applied in clinical assessment of attention and fundamental attention research. However, most TVA-based research is based on accuracy data from letter report experiments performed in controlled laboratory environments. While such basic approaches to questions regarding attentional selection are undoubtedly useful, recent technological advances have enabled the use of increasingly sophisticated experimental paradigms involving more realistic scenarios. Notably, these studies have in many cases resulted in different estimates of capacity limits than those found in studies using traditional TVA-based assessment. Here we review recent developments in TVA-based assessment of attention that goes beyond the use of letter report experiments and experiments performed in controlled laboratory environments. We show that TVA can be used with other tasks and new stimuli, that TVA-based parameter estimation can be embedded into complex scenarios, such as games that can be used to investigate particular problems regarding visual attention, and how TVA-based simulations of “visual foraging” can elucidate attentional control in more naturalistic tasks. We also discuss how these developments may inform future advances of TVA.
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Affiliation(s)
- Jan Tünnermann
- Philipps-University Marburg , Department of Psychology , Marburg , Germany
| | - Árni Kristjánsson
- Icelandic Vision Laboratory , School of Health Sciences , University of Iceland, Reykjavík, Iceland; National Research University Higher School of Economics , Moscow , Russian Federation
| | - Anders Petersen
- Center for Visual Cognition , Department of Psychology , University of Copenhagen , Copenhagen , Denmark
| | - Anna Schubö
- Philipps-University Marburg , Department of Psychology , Marburg , Germany
| | - Ingrid Scharlau
- Department of Arts and Humanities , Paderborn University , Paderborn , Germany
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Wang T, Thielen H, De Preter E, Vangkilde S, Gillebert CR. Encouraging Digital Technology in Neuropsychology: The Theory of Visual Attention on Tablet Devices. Arch Clin Neuropsychol 2021; 36:1450–1464. [PMID: 33621327 DOI: 10.1093/arclin/acab007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2021] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE Visual attention helps us to selectively process relevant information and is crucial in our everyday interactions with the environment. Not surprisingly, it is one of the cognitive domains that is most frequently affected by acquired brain injury. Reliable assessment of attention deficits is pivotal to neuropsychological examination and helps to optimize individual rehabilitation plans. Compared with conventional pen-and-paper tests, computerized tasks borrowed from the field of experimental psychology bring many benefits, but lab-based experimental setups cannot be easily incorporated in clinical practice. Light-weight and portable mobile tablet devices may facilitate the translation of computerized tasks to clinical settings. One such task is based on the Theory of Visual Attention (TVA), a mathematical model of visual attention. TVA-based paradigms have been widely used to investigate several aspects of visual attention in both fundamental and clinical research, and include measures for general processing capacity as well as stimulus-specific attentional parameters. METHODS This article discusses the benefits of TVA-based assessments compared with frequently used neuropsychological tests of visual attention, and examines the reliability of a tablet-based TVA-based assessment in 59 neurologically healthy participants. RESULTS Pearson's correlations indicate that the tablet-based TVA assessment and the conventional lab-based TVA assessment have a comparable parallel-form (range: .67-.93), test-retest (range: .61-.78), and internal reliability (range: .56-.97). CONCLUSION Our results suggest that tablet-based TVA assessment may be a promising tool to acquire clinical measures of visual attention at low cost at the bedside of the patient.
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Affiliation(s)
- Tianlu Wang
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
| | - Hella Thielen
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
| | - Erik De Preter
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
| | - Signe Vangkilde
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
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Franke K, Bublak P, Hoyer D, Billiet T, Gaser C, Witte OW, Schwab M. In vivo biomarkers of structural and functional brain development and aging in humans. Neurosci Biobehav Rev 2021; 117:142-164. [PMID: 33308708 DOI: 10.1016/j.neubiorev.2017.11.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 11/01/2017] [Accepted: 11/03/2017] [Indexed: 12/25/2022]
Abstract
Brain aging is a major determinant of aging. Along with the aging population, prevalence of neurodegenerative diseases is increasing, therewith placing economic and social burden on individuals and society. Individual rates of brain aging are shaped by genetics, epigenetics, and prenatal environmental. Biomarkers of biological brain aging are needed to predict individual trajectories of aging and the risk for age-associated neurological impairments for developing early preventive and interventional measures. We review current advances of in vivo biomarkers predicting individual brain age. Telomere length and epigenetic clock, two important biomarkers that are closely related to the mechanistic aging process, have only poor deterministic and predictive accuracy regarding individual brain aging due to their high intra- and interindividual variability. Phenotype-related biomarkers of global cognitive function and brain structure provide a much closer correlation to age at the individual level. During fetal and perinatal life, autonomic activity is a unique functional marker of brain development. The cognitive and structural biomarkers also boast high diagnostic specificity for determining individual risks for neurodegenerative diseases.
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Affiliation(s)
- K Franke
- Department of Neurology, Jena University Hospital, Jena, Germany.
| | - P Bublak
- Department of Neurology, Jena University Hospital, Jena, Germany
| | - D Hoyer
- Department of Neurology, Jena University Hospital, Jena, Germany
| | | | - C Gaser
- Department of Neurology, Jena University Hospital, Jena, Germany; Department of Psychiatry, Jena University Hospital, Jena, Germany
| | - O W Witte
- Department of Neurology, Jena University Hospital, Jena, Germany
| | - M Schwab
- Department of Neurology, Jena University Hospital, Jena, Germany
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Lindström SH, Sundberg SC, Larsson M, Andersson FK, Broman J, Granseth B. VGluT1 Deficiency Impairs Visual Attention and Reduces the Dynamic Range of Short-Term Plasticity at Corticothalamic Synapses. Cereb Cortex 2021; 30:1813-1829. [PMID: 31711131 PMCID: PMC7132919 DOI: 10.1093/cercor/bhz204] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 08/08/2019] [Accepted: 08/13/2019] [Indexed: 12/17/2022] Open
Abstract
The most common excitatory neurotransmitter in the central nervous system, glutamate, is loaded into synaptic vesicles by vesicular glutamate transporters (VGluTs). The primary isoforms, VGluT1 and 2, are expressed in complementary patterns throughout the brain and correlate with short-term synaptic plasticity. VGluT1 deficiency is observed in certain neurological disorders, and hemizygous (VGluT1+/−) mice display increased anxiety and depression, altered sensorimotor gating, and impairments in learning and memory. The synaptic mechanisms underlying these behavioral deficits are unknown. Here, we show that VGluT1+/− mice had decreased visual processing speeds during a sustained visual-spatial attention task. Furthermore, in vitro recordings of corticothalamic (CT) synapses revealed dramatic reductions in short-term facilitation, increased initial release probability, and earlier synaptic depression in VGluT1+/− mice. Our electron microscopy results show that VGluT1 concentration is reduced at CT synapses of hemizygous mice, but other features (such as vesicle number and active zone size) are unchanged. We conclude that VGluT1-haploinsuficiency decreases the dynamic range of gain modulation provided by CT feedback to the thalamus, and this deficiency contributes to the observed attentional processing deficit. We further hypothesize that VGluT1 concentration regulates release probability by applying a “brake” to an unidentified presynaptic protein that typically acts as a positive regulator of release.
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Affiliation(s)
- Sarah H Lindström
- Department of Clinical and Experimental Medicine, Division of Neurobiology, Linköping University, Linköping, 58185, Sweden
| | - Sofie C Sundberg
- Department of Clinical and Experimental Medicine, Division of Neurobiology, Linköping University, Linköping, 58185, Sweden
| | - Max Larsson
- Department of Clinical and Experimental Medicine, Division of Neurobiology, Linköping University, Linköping, 58185, Sweden
| | - Fredrik K Andersson
- Department of Clinical and Experimental Medicine, Division of Neurobiology, Linköping University, Linköping, 58185, Sweden
| | - Jonas Broman
- Department of Clinical and Experimental Medicine, Division of Neurobiology, Linköping University, Linköping, 58185, Sweden
| | - Björn Granseth
- Department of Clinical and Experimental Medicine, Division of Neurobiology, Linköping University, Linköping, 58185, Sweden
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12
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TVA in the wild: Applying the theory of visual attention to game-like and less controlled experiments. OPEN PSYCHOLOGY 2021. [DOI: 10.1515/psych-2021-0001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
As a formal theory, Bundesen’s theory of visual attention (TVA) enables the estimation of several theoretically meaningful parameters involved in attentional selection and visual encoding. As of yet, TVA has almost exclusively been used in restricted empirical scenarios such as whole and partial report and with strictly controlled stimulus material. We present a series of experiments in which we test whether the advantages of TVA can be exploited in more realistic scenarios with varying degree of stimulus control. This includes brief experimental sessions conducted on different mobile devices, computer games, and a driving simulator. Overall, six experiments demonstrate that the TVA parameters for processing capacity and attentional weight can be measured with sufficient precision in less controlled scenarios and that the results do not deviate strongly from typical laboratory results, although some systematic differences were found.
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13
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Reduced perceptual processing speed and atypical attentional weight at the cores of visual simultaneous processing deficits in Chinese children with developmental dyslexia: a parameter-based assessment of visual attention. CURRENT PSYCHOLOGY 2021. [DOI: 10.1007/s12144-021-01691-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Haupt M, Jödecke S, Srowig A, Napiórkowski N, Preul C, Witte OW, Finke K. Phasic alerting increases visual processing speed in amnestic mild cognitive impairment. Neurobiol Aging 2021; 102:23-31. [PMID: 33765429 DOI: 10.1016/j.neurobiolaging.2021.01.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 01/12/2021] [Accepted: 01/28/2021] [Indexed: 11/25/2022]
Abstract
External warning cues temporarily increase the brain's sensitivity for upcoming events, helping individuals to flexibly adapt their reactions to the requirements of complex visual environments. Previous studies reported that younger and cognitively normal older adults profit from phasic alerting cues. Such an intact phasic alerting mechanism could be even more relevant in individuals with Alzheimer's disease who are characterized by reduced processing capacities. The present study employed a theory of visual attention based verbal whole report paradigm with auditory cues in order to investigate phasic alerting effects in amnestic mild cognitive impairment (aMCI). Patients with aMCI were also compared to a previously reported sample of cognitively normal older adults. In patients with aMCI, visual processing speed was higher in the cue compared to the no-cue condition. Further, visual processing speed was reduced in patients with aMCI compared to cognitively normal older adults. Taken together, the results suggest that the processing system of patients with aMCI exhibits general declines but can still integrate auditory warning signals on a perceptual level.
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Affiliation(s)
- Marleen Haupt
- Hans-Berger Department of Neurology, University Hospital Jena, Jena, Germany; General and Experimental Psychology, Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany; Graduate School of Systemic Neurosciences (GSN), Ludwig-Maximilians-Universität München, Munich, Germany.
| | - Steffen Jödecke
- Hans-Berger Department of Neurology, University Hospital Jena, Jena, Germany
| | - Annie Srowig
- Hans-Berger Department of Neurology, University Hospital Jena, Jena, Germany
| | - Natan Napiórkowski
- Hans-Berger Department of Neurology, University Hospital Jena, Jena, Germany
| | - Christoph Preul
- Hans-Berger Department of Neurology, University Hospital Jena, Jena, Germany
| | - Otto W Witte
- Hans-Berger Department of Neurology, University Hospital Jena, Jena, Germany
| | - Kathrin Finke
- Hans-Berger Department of Neurology, University Hospital Jena, Jena, Germany; General and Experimental Psychology, Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany
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15
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Penning MD, Ruiz-Rizzo AL, Redel P, Müller HJ, Salminen T, Strobach T, Behrens S, Schubert T, Sorg C, Finke K. Alertness Training Increases Visual Processing Speed in Healthy Older Adults. Psychol Sci 2021; 32:340-353. [DOI: 10.1177/0956797620965520] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
In this study, we investigated whether alertness training in healthy older adults increases visual processing speed (VPS) and whether functional connectivity in the cingulo-opercular network predicts training gain. Using the theory of visual attention, we derived quantitative estimates of VPS before and after training. In Study 1, 75 healthy older adults participated in alertness training, active-control training, or no training ( n = 25 each). A significant Group × Session interaction indicated an increase in VPS in the alertness-training group but not in the control group, despite VPS not differing significantly between groups before training. In Study 2, 29 healthy older adults underwent resting-state functional MRI and then participated in alertness training. Pretraining functional connectivity in the cingulo-opercular network correlated with the individual training-induced change in VPS. In conclusion, results indicate that alertness training improves visual processing in older adults and that functional connectivity in the cingulo-opercular network provides a neural marker for predicting individual training gain.
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Affiliation(s)
- Melanie D. Penning
- Department of Psychology, Ludwig-Maximilians-Universität München
- Graduate School of Systemic Neurosciences, Ludwig-Maximilians-Universität München
| | | | - Petra Redel
- Department of Psychology, Ludwig-Maximilians-Universität München
| | - Hermann J. Müller
- Department of Psychology, Ludwig-Maximilians-Universität München
- Graduate School of Systemic Neurosciences, Ludwig-Maximilians-Universität München
| | - Tiina Salminen
- Department of Psychology, Ludwig-Maximilians-Universität München
- Graduate School of Systemic Neurosciences, Ludwig-Maximilians-Universität München
- Department of Psychology, Humboldt-Universität zu Berlin
| | - Tilo Strobach
- Department of Psychology, Medical School Hamburg, Germany
| | - Simone Behrens
- Department of Psychology, Ludwig-Maximilians-Universität München
- Department of Psychosomatic Medicine, University of Tübingen
| | - Torsten Schubert
- Department of Psychology, Ludwig-Maximilians-Universität München
- Department of Psychology, Humboldt-Universität zu Berlin
- Department of Psychology, Martin-Luther-Universität Halle-Wittenberg
| | - Christian Sorg
- TUM-NIC Neuroimaging Center, Technische Universität München
- Department of Psychiatry, School of Medicine, Klinikum Rechts der Isar, Technische Universität München
- Department of Neuroradiology, Klinikum Rechts der Isar, Technische Universität München
| | - Kathrin Finke
- Department of Psychology, Ludwig-Maximilians-Universität München
- Graduate School of Systemic Neurosciences, Ludwig-Maximilians-Universität München
- Hans-Berger Department of Neurology, University Hospital Jena, Germany
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16
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Ver Loren van Themaat AH, Hemager N, Korsgaard Johnsen L, Klee Burton B, Ellersgaard D, Christiani C, Brandt J, Gregersen M, Falkenberg Krantz M, Søborg Spang K, Søndergaard A, Møllegaard Jepsen JR, Elgaard Thorup AA, Siebner HR, Plessen KJ, Nordentoft M, Vangkilde S. Development of visual attention from age 7 to age 12 in children with familial high risk for schizophrenia or bipolar disorder. Schizophr Res 2021; 228:327-335. [PMID: 33540144 DOI: 10.1016/j.schres.2020.12.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 12/27/2020] [Accepted: 12/30/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Children with familial high risk of schizophrenia (FHR-SZ) or bipolar disorder (FHR-BP) are at increased risk of developing similar disorders and show cognitive deficits during childhood. The aim of this paper is to investigate visual attention and its developmental trajectories in children with FHR-SZ and with FHR-BP to increase our knowledge about potential cognitive endophenotypes of these two disorders. METHODS We compared the performance of 89 children with FHR-SZ (N = 32), FHR-BP (N = 22), and population-based controls (PBC, N = 35) at age 7 to that at age 12 as well as including 133 12-year-old children with FHR-SZ (N = 50), FHR-BP (N = 43) and PBC (N = 40) to investigate visual attention, as part of the Danish High Risk and Resilience Study. We used the TVA-based whole report paradigm, based on the Bundesen's Theory of Visual Attention (TVA) to investigate visual attention. RESULTS Children with FHR-SZ that showed deficits in visual processing speed at age 7 improved to a level that was not significantly different from controls at age 12. All children improved over time. We found no attentional deficits in FHR children at age 12. CONCLUSIONS On visual attention, children with FHR-SZ did not show developmental deficits or lags and, together with children with FHR-BP, they develop similarly to control children between age 7 to age 12. This emphasizes the potential of beneficial neuroplastic changes in cognitive deficits found at younger ages in children with FHR-SZ. It also highlights the importance of identifying and characterizing cognitive developmental trajectories of high-risk children and provides hope that visual attention may develop appropriately in these groups.
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Affiliation(s)
- Anna Hester Ver Loren van Themaat
- Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark.
| | - Nicoline Hemager
- Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Line Korsgaard Johnsen
- Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark
| | - Birgitte Klee Burton
- Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Ditte Ellersgaard
- Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Camilla Christiani
- Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Julie Brandt
- Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Maja Gregersen
- Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Mette Falkenberg Krantz
- Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Katrine Søborg Spang
- Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Anne Søndergaard
- Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark
| | - Jens Richardt Møllegaard Jepsen
- Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark; Center for Neuropsychiatric Schizophrenia Research, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark
| | - Anne Amalie Elgaard Thorup
- Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Hartwig Roman Siebner
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Department of Neurology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
| | - Kerstin Jessica Plessen
- Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark; Service of Child and Adolescent Psychiatry, Department of Psychiatry, University Medical Center, University of Lausanne, Lausanne, Switzerland
| | - Merete Nordentoft
- Copenhagen Research Center for Mental Health - CORE, Mental Health Centre Copenhagen, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH), Aarhus, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Signe Vangkilde
- Child and Adolescent Mental Health Centre, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark; Center for Visual Cognition, Department of Psychology, University of Copenhagen, Denmark
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17
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Kreyenmeier P, Deubel H, Hanning NM. Theory of visual attention (TVA) in action: Assessing premotor attention in simultaneous eye-hand movements. Cortex 2020; 133:133-148. [DOI: 10.1016/j.cortex.2020.09.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 10/23/2022]
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18
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Richard G, Petersen A, Ulrichsen KM, Kolskår KK, Alnæs D, Sanders AM, Dørum ES, Ihle-Hansen H, Nordvik JE, Westlye LT. TVA-based modeling of short-term memory capacity, speed of processing and perceptual threshold in chronic stroke patients undergoing cognitive training: case-control differences, reliability, and associations with cognitive performance. PeerJ 2020; 8:e9948. [PMID: 33194366 PMCID: PMC7602688 DOI: 10.7717/peerj.9948] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 08/25/2020] [Indexed: 01/12/2023] Open
Abstract
Attentional deficits following stroke are common and pervasive, and are important predictors for functional recovery. Attentional functions comprise a set of specific cognitive processes allowing to attend, filter and select among a continuous stream of stimuli. These mechanisms are fundamental for more complex cognitive functions such as learning, planning and cognitive control, all crucial for daily functioning. The distributed functional neuroanatomy of these processes is a likely explanation for the high prevalence of attentional impairments following stroke, and underscores the importance of a clinical implementation of computational approaches allowing for sensitive and specific modeling of attentional sub-processes. The Theory of Visual Attention (TVA) offers a theoretical, computational, neuronal and practical framework to assess the efficiency of visual selection performance and parallel processing of multiple objects. Here, in order to assess the sensitivity and reliability of TVA parameters reflecting short-term memory capacity (K), processing speed (C) and perceptual threshold (t 0), we used a whole-report paradigm in a cross-sectional case-control comparison and across six repeated assessments over the course of a three-week computerized cognitive training (CCT) intervention in chronic stroke patients (> 6 months since hospital admission, NIHSS ≤ 7 at hospital discharge). Cross-sectional group comparisons documented lower short-term memory capacity, lower processing speed and higher perceptual threshold in patients (n = 70) compared to age-matched healthy controls (n = 140). Further, longitudinal analyses in stroke patients during the course of CCT (n = 54) revealed high reliability of the TVA parameters, and higher processing speed at baseline was associated with larger cognitive improvement after the intervention. The results support the feasibility, reliability and sensitivity of TVA-based assessment of attentional functions in chronic stroke patients.
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Affiliation(s)
- Geneviève Richard
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Anders Petersen
- Center for Visual Cognition, Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Kristine Moe Ulrichsen
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Knut K. Kolskår
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Dag Alnæs
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Anne-Marthe Sanders
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Erlend S. Dørum
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Hege Ihle-Hansen
- Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway
| | | | - Lars T. Westlye
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- KG Jebsen Centre for Neurodevelopmental Disorders, University of Oslo, Oslo, Norway
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19
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Peers PV, Astle DE, Duncan J, Murphy FC, Hampshire A, Das T, Manly T. Dissociable effects of attention vs working memory training on cognitive performance and everyday functioning following fronto-parietal strokes. Neuropsychol Rehabil 2020; 30:1092-1114. [PMID: 30569816 PMCID: PMC7266670 DOI: 10.1080/09602011.2018.1554534] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 11/22/2018] [Indexed: 10/29/2022]
Abstract
Difficulties with attention are common following stroke, particularly in patients with frontal and parietal damage, and are associated with poor outcome. Home-based online cognitive training may have the potential to provide an efficient and effective way to improve attentional functions in such patients. Little work has been carried out to assess the efficacy of this approach in stroke patients, and the lack of studies with active control conditions and rigorous evaluations of cognitive functioning pre and post-training means understanding is limited as to whether and how such interventions may be effective. Here, in a feasibility pilot study, we compare the effects of 20 days of cognitive training using either novel Selective Attention Training (SAT) or commercial Working Memory Training (WMT) programme, versus a waitlist control on a range of attentional and working memory tasks. We demonstrate separable effects of each training condition, with SAT leading to improvements in spatial and non-spatial aspects of attention and WMT leading to improvements on closely related working memory tasks. In addition, both training groups reported improvements in everyday functioning, which were associated with improvements in attention, suggesting that improving attention may be of particular importance in maximising functional improvements in this patient group.
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Affiliation(s)
- Polly V Peers
- MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge, UK
| | - Duncan E Astle
- MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge, UK
| | - John Duncan
- MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge, UK
| | - Fionnuala C Murphy
- MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge, UK
| | - Adam Hampshire
- Division of Brain Sciences, Department of Medicine, Imperial College London, London, UK
| | - Tilak Das
- Department of Radiology, Cambridge University Hospitals NHS Trust, Cambridge, UK
| | - Tom Manly
- MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge, UK
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20
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Valdois S, Roulin JL, Line Bosse M. Visual attention modulates reading acquisition. Vision Res 2019; 165:152-161. [DOI: 10.1016/j.visres.2019.10.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 07/16/2019] [Accepted: 10/30/2019] [Indexed: 12/20/2022]
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21
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Stefanac N, Spencer-Smith M, Brosnan M, Vangkilde S, Castles A, Bellgrove M. Visual processing speed as a marker of immaturity in lexical but not sublexical dyslexia. Cortex 2019; 120:567-581. [DOI: 10.1016/j.cortex.2019.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/12/2019] [Accepted: 08/06/2019] [Indexed: 01/04/2023]
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22
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Low AM, Vangkilde S, le Sommer J, Fagerlund B, Glenthøj B, Jepsen JRM, Bundesen C, Petersen A, Habekost T. Visual attention in adults with attention-deficit/hyperactivity disorder before and after stimulant treatment. Psychol Med 2019; 49:2617-2625. [PMID: 30560740 DOI: 10.1017/s0033291718003628] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder which frequently persists into adulthood. The primary goal of the current study was to (a) investigate attentional functions of stimulant medication-naïve adults with ADHD, and (b) investigate the effects of 6 weeks of methylphenidate treatment on these functions. METHODS The study was a prospective, non-randomized, non-blinded, 6-week follow-up design with 42 stimulant medication-naïve adult patients with ADHD, and 42 age and parental education-matched healthy controls. Assessments included measures of visual attention, based on Bundesen's Theory of Visual Attention (TVA), which yields five precise measures of aspects of visual attention; general psychopathology; ADHD symptoms; dyslexia screening; and estimates of IQ. RESULTS At baseline, significant differences were found between patients and controls on three attentional parameters: visual short-term memory capacity, threshold of conscious perception, and to a lesser extent visual processing speed. Secondary analyses revealed no significant correlations between TVA parameter estimates and severity of ADHD symptomatology. At follow-up, significant improvements were found specifically for visual processing speed; this improvement had a large effect size, and remained when controlling for re-test effects, IQ, and dyslexia screen performance. There were no significant correlations between changes in visual processing speed and changes in ADHD symptomatology. CONCLUSIONS ADHD in adults may be associated with deficits in three distinct aspects of visual attention. Improvements after 6 weeks of medication are seen specifically in visual processing speed, which could represent an improvement in alertness. Clinical symptoms and visual attentional deficits may represent separate aspects of ADHD in adults.
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Affiliation(s)
- Ann-Marie Low
- Deparment of Psychology, University of Copenhagen, Copenhagen, Denmark
- Center for Neuropsychiatric Schizophrenia Research (CNSR) and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), University of Copenhagen, Copenhagen, Denmark
| | - Signe Vangkilde
- Deparment of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Julijana le Sommer
- Center for Neuropsychiatric Schizophrenia Research (CNSR) and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), University of Copenhagen, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Birgitte Fagerlund
- Center for Neuropsychiatric Schizophrenia Research (CNSR) and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), University of Copenhagen, Copenhagen, Denmark
| | - Birte Glenthøj
- Center for Neuropsychiatric Schizophrenia Research (CNSR) and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), University of Copenhagen, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jens Richardt Møllegaard Jepsen
- Center for Neuropsychiatric Schizophrenia Research (CNSR) and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), University of Copenhagen, Copenhagen, Denmark
- Child and Adolescent Mental Health Center, Mental Health Services, Copenhagen, Denmark
| | - Claus Bundesen
- Deparment of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Anders Petersen
- Deparment of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Habekost
- Deparment of Psychology, University of Copenhagen, Copenhagen, Denmark
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23
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Hemager N, Vangkilde S, Thorup A, Christiani C, Ellersgaard D, Spang KS, Burton BK, Greve AN, Gantriis DL, Mors O, Jepsen JRM, Nordentoft M, Plessen KJ. Visual attention in 7-year-old children at familial high risk of schizophrenia or bipolar disorder: The Danish high risk and resilience study VIA 7. J Affect Disord 2019; 258:56-65. [PMID: 31394459 DOI: 10.1016/j.jad.2019.07.079] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 07/10/2019] [Accepted: 07/29/2019] [Indexed: 01/01/2023]
Abstract
BACKGROUND Attention deficits are found in children at familial high risk of schizophrenia (FHR-SZ) and bipolar disorder (FHR-BP) using assessment methods relying on motor-based response latency. This study compares visual attention functions in children at FHR-SZ or FHR-BP with controls using an unspeeded task unconfounded by motor components. METHODS Visual attention was assessed in 133 7-year-old children at FHR-SZ (N = 56) or FHR-BP (N = 32), and controls (N = 45) using the unspeeded paradigm, TVA-based whole report. We compared four parameters of visual attention: visual processing speed, visual short-term memory, threshold for visual perception, and error rate. Further, we investigated their potential relationships with severity of psychopathology, adequacy of the home environment, and neurocognitive measures. RESULTS Children at FHR-SZ displayed significant deficits in perceptual processing speed of visual attention compared with controls (p < .001; d = 0.75) as did children at FHR-BP (p < .05; d = 0.54). Visual processing speed was significantly associated with spatial working memory (β = -0.23; t(68) = -3.34, p = .01) and psychomotor processing speed (β = 0.14, t(67) = 2.11, p < .05). LIMITATIONS Larger group sizes would have permitted inclusion of more predictors in the search for neurocognitive and other factors associated with the parameters of TVA-based whole report. CONCLUSIONS Young children at FHR-SZ and FHR-BP display significant deficits in processing speed of visual attention, which may reflect the effect of shared vulnerability risk genes. Early identification of children at FHR-SZ and FHR-BP with perceptual processing speed impairments may represent a low-cost basis for low-risk interventions.
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Affiliation(s)
- Nicoline Hemager
- Mental Health Services of the Capital Region of Denmark, Mental Health Centre Copenhagen, Research Unit, Gentofte Hospitalsvej 15, 4th Floor, 2900 Hellerup, Denmark; Mental Health Services of the Capital Region of Denmark, Child and Adolescent Mental Health Centre, Research Unit Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark.
| | - Signe Vangkilde
- Mental Health Services of the Capital Region of Denmark, Child and Adolescent Mental Health Centre, Research Unit Denmark; Department of Psychology, Center for Visual Cognition, University of Copenhagen, Denmark
| | - Anne Thorup
- Mental Health Services of the Capital Region of Denmark, Mental Health Centre Copenhagen, Research Unit, Gentofte Hospitalsvej 15, 4th Floor, 2900 Hellerup, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark
| | - Camilla Christiani
- Mental Health Services of the Capital Region of Denmark, Mental Health Centre Copenhagen, Research Unit, Gentofte Hospitalsvej 15, 4th Floor, 2900 Hellerup, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark
| | - Ditte Ellersgaard
- Mental Health Services of the Capital Region of Denmark, Mental Health Centre Copenhagen, Research Unit, Gentofte Hospitalsvej 15, 4th Floor, 2900 Hellerup, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark
| | - Katrine Søborg Spang
- Mental Health Services of the Capital Region of Denmark, Child and Adolescent Mental Health Centre, Research Unit Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark
| | - Birgitte Klee Burton
- Mental Health Services of the Capital Region of Denmark, Child and Adolescent Mental Health Centre, Research Unit Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark
| | - Aja Neergaard Greve
- The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark; Psychosis Research Unit, Aarhus University Hospital, Denmark
| | - Ditte Lou Gantriis
- The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark; Psychosis Research Unit, Aarhus University Hospital, Denmark
| | - Ole Mors
- The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark; Psychosis Research Unit, Aarhus University Hospital, Denmark
| | - Jens Richardt Møllegaard Jepsen
- Mental Health Services of the Capital Region of Denmark, Child and Adolescent Mental Health Centre, Research Unit Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark; Mental Health Services of the Capital Region of Denmark, Mental Health Centre Glostrup, Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Denmark
| | - Merete Nordentoft
- Mental Health Services of the Capital Region of Denmark, Mental Health Centre Copenhagen, Research Unit, Gentofte Hospitalsvej 15, 4th Floor, 2900 Hellerup, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Kerstin Jessica Plessen
- Mental Health Services of the Capital Region of Denmark, Child and Adolescent Mental Health Centre, Research Unit Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, Denmark; Division of Child and Adolescent Psychiatry, Department of Psychiatry, University Hospital of Lausanne, Switzerland
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24
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Brosnan MB, Demaria G, Petersen A, Dockree PM, Robertson IH, Wiegand I. Plasticity of the Right-Lateralized Cognitive Reserve Network in Ageing. Cereb Cortex 2019; 28:1749-1759. [PMID: 28444373 DOI: 10.1093/cercor/bhx085] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Indexed: 12/22/2022] Open
Abstract
Cognitive reserve (CR) is the phenomenon where older adults with more cognitively stimulating environments show less age-related cognitive decline. The right-lateralized fronto-parietal network has been proposed to significantly contribute to CR and visual attention in ageing. In this study we tested whether plasticity of this network may be harnessed in ageing.We assessed CR and parameters of visual attention capacity in older adults. Transcranial direct current stimulation (tDCS) was employed to increase right fronto-parietal activity during a lateralized whole-report task. At baseline, older adults with greater CR showed a stronger hemifield asymmetry in processing speed towards the left visual-field, indicative of stronger involvement of the right hemisphere in these individuals. Correspondingly, processing speed improved during right prefrontal tDCS. Older adults with lower levels of CR showed tDCS-related improvements in processing speed in the left but not right hemifield: thus tDCS temporarily altered their processing speed asymmetry to resemble that of their high reserve peers.The finding that stronger right hemisphere involvement is related to CR supports Robertson's theory. Furthermore, preserved plasticity within the right prefrontal cortex in older adults suggests this is a viable target area to improve visual processing speed, a hallmark of age-related decline.
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Affiliation(s)
- Méadhbh B Brosnan
- Institute of Neuroscience and School of Psychology, Trinity College Dublin, The University of Dublin, Ireland
| | - Giorgia Demaria
- Institute of Neuroscience and School of Psychology, Trinity College Dublin, The University of Dublin, Ireland.,Faculty of Psychology and Neuroscience, Maastricht University, The Netherlands
| | - Anders Petersen
- Centre for Visual Cognition, University of Copenhagen, Denmark
| | - Paul M Dockree
- Institute of Neuroscience and School of Psychology, Trinity College Dublin, The University of Dublin, Ireland
| | - Ian H Robertson
- Institute of Neuroscience and School of Psychology, Trinity College Dublin, The University of Dublin, Ireland
| | - Iris Wiegand
- Centre for Visual Cognition, University of Copenhagen, Denmark.,Center for Lifespan Development, Max-Planck Institute for Human Development, Berlin, Germany.,Max-Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany
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25
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Haupt M, Ruiz-Rizzo AL, Sorg C, Finke K. Phasic alerting effects on visual processing speed are associated with intrinsic functional connectivity in the cingulo-opercular network. Neuroimage 2019; 196:216-226. [PMID: 30978493 DOI: 10.1016/j.neuroimage.2019.04.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 04/01/2019] [Accepted: 04/04/2019] [Indexed: 01/13/2023] Open
Abstract
Phasic alertness refers to short-lived increases in the brain's "state of readiness", and thus to optimized performance following warning cues. Parametric modelling of whole report task performance based on the computational theory of visual attention (TVA) has demonstrated that visual processing speed is increased in such cue compared to no-cue conditions. Furthermore, with respect to the underlying neural mechanisms, individual visual processing speed has been related to intrinsic functional connectivity (iFC) within the cingulo-opercular network, suggesting that this network's iFC is relevant for the tonic maintenance of an appropriate readiness or alertness state. In the present study, we asked whether iFC in the cingulo-opercular network is also related to the individual ability to actively profit from warning cues, i.e. to the degree of phasic alerting. We obtained resting-state functional magnetic resonance imaging (rs-fMRI) data from 32 healthy young participants and combined an independent component analysis of rs-fMRI time courses and dual regression approach to determine iFC in the cingulo-opercular network. In a separate behavioural testing session, we parametrically assessed the effects of auditory phasic alerting cues on visual processing speed in a TVA-based whole report paradigm. A voxel-wise multiple regression revealed that higher individual phasic alerting effects on visual processing speed were significantly associated with lower iFC in the cingulo-opercular network, with a peak in the left superior orbital gyrus. As phasic alertness was neither related to iFC in other attention-relevant, auditory, or visual networks nor associated with any inter-network connectivity pattern, the results suggest that the individual profit in visual processing speed gained from phasic alerting is primarily associated with iFC in the cingulo-opercular network.
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Affiliation(s)
- Marleen Haupt
- General and Experimental Psychology, Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany; Graduate School of Systemic Neurosciences (GSN), Ludwig-Maximilians-Universität München, Munich, Germany.
| | - Adriana L Ruiz-Rizzo
- General and Experimental Psychology, Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Christian Sorg
- Department of Neuroradiology, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany; Department of Psychiatry and Psychotherapy, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Kathrin Finke
- General and Experimental Psychology, Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany; Hans-Berger Department of Neurology, University Hospital Jena, Jena, Germany
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26
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Menegaux A, Napiorkowski N, Neitzel J, Ruiz-Rizzo AL, Petersen A, Müller HJ, Sorg C, Finke K. Theory of visual attention thalamic model for visual short-term memory capacity and top-down control: Evidence from a thalamo-cortical structural connectivity analysis. Neuroimage 2019; 195:67-77. [DOI: 10.1016/j.neuroimage.2019.03.052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 03/15/2019] [Accepted: 03/23/2019] [Indexed: 10/27/2022] Open
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27
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Shalev N, Vangkilde S, Neville MJ, Tunbridge EM, Nobre AC, Chechlacz M. Dissociable Catecholaminergic Modulation of Visual Attention: Differential Effects of Catechol-O-Methyltransferase and Dopamine Beta-Hydroxylase Genes on Visual Attention. Neuroscience 2019; 412:175-189. [PMID: 31195057 PMCID: PMC6645579 DOI: 10.1016/j.neuroscience.2019.05.068] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 05/30/2019] [Accepted: 05/31/2019] [Indexed: 01/17/2023]
Abstract
Visual attention enables us to prioritise behaviourally relevant visual information while ignoring distraction. The neural networks supporting attention are modulated by two catecholamines, dopamine and noradrenaline. The current study investigated the effects of single nucleotide polymorphisms in two catecholaminergic genes – COMT (Val158Met) and DBH (444 G/A) – on individual differences in attention functions. Participants (n = 125) were recruited from the Oxford Biobank by genotype-based recall. They were tested on a continuous performance task (sustained attention), a Go/No-Go task (response inhibition), and a task assessing attentional selection in accordance with the Theory of Visual Attention (TVA). We found a significant effect of DBH genotype status on the capacity to maintain attention over time (sustained attention) as measured by the continuous performance task. Furthermore, we demonstrated a significant association between COMT genotype status and effective threshold of visual perception in attentional selection as estimated based on the TVA task performance. No other group differences in attention function were found with respect to the studied genotypes. Overall, our findings provide novel experimental evidence that: (i) dopaminergic and noradrenergic genotypes have dissociable effects on visual attention; (ii) either insufficient or excessive catecholaminergic activity may have equally detrimental effects on sustained attention. Catecholaminergic genotypes have dissociative cognitive effects on visual attention. DBH (444 G/A) polymorphism affects sustained attention. COMT Val158Met polymorphism affects perceptual threshold in visual attention. Both too little and too much catecholamines may detrimentally impact sustained attention.
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Affiliation(s)
- Nir Shalev
- Department of Experimental Psychology, University of Oxford, Oxford, UK; Oxford Centre for Human Brain Activity, University of Oxford, Oxford, UK; Wellcome Centre for Integrative Neuroimaging, University of Oxford, Oxford, UK
| | - Signe Vangkilde
- Department of Psychology, Center for Visual Cognition, University of Copenhagen, Copenhagen, Denmark
| | - Matt J Neville
- Oxford NIHR Biomedical Research Centre, University of Oxford, Churchill Hospital, Oxford, UK; Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Elizabeth M Tunbridge
- Department of Psychiatry, University of Oxford, Oxford, UK; Oxford Health NHS Foundation Trust, Oxford, UK
| | - Anna C Nobre
- Department of Experimental Psychology, University of Oxford, Oxford, UK; Oxford Centre for Human Brain Activity, University of Oxford, Oxford, UK; Wellcome Centre for Integrative Neuroimaging, University of Oxford, Oxford, UK; Department of Psychiatry, University of Oxford, Oxford, UK
| | - Magdalena Chechlacz
- Department of Experimental Psychology, University of Oxford, Oxford, UK; Centre for Human Brain Health, University of Birmingham, Birmingham, UK; School of Psychology, University of Birmingham, Birmingham, UK; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, USA.
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28
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Fischer M, Köhler W, Faiss JH, Hoffmann F, Kunkel A, Sailer M, Schwab M, Zettl UK, Bublak P. A smart peek: Processing of rapid visual displays is disturbed in newly diagnosed, cognitively intact MS patients and refers to cognitive performance and disease progression in late stages. J Neurol Sci 2019; 401:118-124. [DOI: 10.1016/j.jns.2019.04.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 04/18/2019] [Accepted: 04/22/2019] [Indexed: 10/27/2022]
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29
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Fitzpatrick CM, Runegaard AH, Christiansen SH, Hansen NW, Jørgensen SH, McGirr JC, de Diego Ajenjo A, Sørensen AT, Perrier JF, Petersen A, Gether U, Woldbye DPD, Andreasen JT. Differential effects of chemogenetic inhibition of dopamine and norepinephrine neurons in the mouse 5-choice serial reaction time task. Prog Neuropsychopharmacol Biol Psychiatry 2019; 90:264-276. [PMID: 30529002 DOI: 10.1016/j.pnpbp.2018.12.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/21/2018] [Accepted: 12/05/2018] [Indexed: 01/15/2023]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is a psychiatric disorder characterized by inattention, aberrant impulsivity, and hyperactivity. Although the underlying pathophysiology of ADHD remains unclear, dopamine and norepinephrine signaling originating from the ventral tegmental area (VTA) and locus coeruleus (LC) is thought to be critically involved. In this study, we employ Designer Receptor Exclusively Activated by Designer Drugs (DREADDs) together with the mouse 5-Choice Serial Reaction Time Task (5-CSRTT) to investigate the necessary roles of these catecholamines in ADHD-related behaviors, including attention, impulsivity, and motivation. By selective inhibition of tyrosine hydroxylase (TH)-positive VTA dopamine neurons expressing the Gi-coupled DREADD (hM4Di), we observed a marked impairment of effort-based motivation and subsequently speed and overall vigor of responding. At the highest clozapine N-oxide (CNO) dose tested (i.e. 2 mg/kg) to activate hM4Di, we detected a reduction in locomotor activity. DREADD-mediated inhibition of LC norepinephrine neurons reduced attentional performance in a variable stimulus duration test designed to increase task difficulty, specifically by increasing trials omissions, reducing mean score, and visual processing speed. These findings show that VTA dopamine and LC norepinephrine neurons differentially affect attention, impulsive and motivational control. In addition, this study highlights how molecular genetic probing of selective catecholamine circuits can provide valuable insights into the mechanisms underlying ADHD-relevant behaviors.
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Affiliation(s)
- Ciarán M Fitzpatrick
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark; Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark.
| | - Annika H Runegaard
- Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Søren H Christiansen
- Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Nikolaj W Hansen
- Neuronal Signaling Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Søren H Jørgensen
- Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Julia C McGirr
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Amaia de Diego Ajenjo
- Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Andreas T Sørensen
- Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Jean-François Perrier
- Neuronal Signaling Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Anders Petersen
- Center for Visual Cognition, Department of Psychology, University of Copenhagen, Copenhagen DK-1353, Denmark
| | - Ulrik Gether
- Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - David P D Woldbye
- Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Jesper T Andreasen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2100, Denmark
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30
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Atkinson LZ, Colbourne L, Smith A, Harmer CH, Nobre AC, Rendell J, Jones H, Hinds C, Mould A, Tunbridge EM, Cipriani A, Geddes JR, Saunders KEA, Harrison PJ. The Oxford study of Calcium channel Antagonism, Cognition, Mood instability and Sleep (OxCaMS): study protocol for a randomised controlled, experimental medicine study. Trials 2019; 20:120. [PMID: 30755265 PMCID: PMC6373140 DOI: 10.1186/s13063-019-3175-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 01/02/2019] [Indexed: 01/04/2023] Open
Abstract
Background The discovery that voltage-gated calcium channel genes such as CACNA1C are part of the aetiology of psychiatric disorders has rekindled interest in the therapeutic potential of L-type calcium channel (LTCC) antagonists. These drugs, licensed to treat hypertension and angina, have previously been used in bipolar disorder, but without clear results. Neither is much known about the broader effects of these drugs on the brain and behaviour. Methods The Oxford study of Calcium channel Antagonism, Cognition, Mood instability and Sleep (OxCaMS) is a high-intensity randomised, double-blind, placebo-controlled experimental medicine study on the effect of the LTCC antagonist nicardipine in healthy young adults with mood instability. An array of cognitive, psychiatric, circadian, physiological, biochemical and neuroimaging (functional magnetic resonance imaging and magnetoencephalography) parameters are measured during a 4-week period, with randomisation to drug or placebo on day 14. We are interested in whether nicardipine affects the stability of these measures, as well as its overall effects. Participants are genotyped for the CACNA1C risk polymorphism rs1006737. Discussion The results will clarify the potential of LTCC antagonists for repurposing or modification for use in psychiatric disorders in which cognition, mood and sleep are affected. Trial registration ISRCTN, ISRCTN33631053. Retrospectively registered on 8 June 2018 (applied 17 May 2018). Electronic supplementary material The online version of this article (10.1186/s13063-019-3175-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lauren Z Atkinson
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK.,Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Warneford Hospital, Oxford, UK
| | - Lucy Colbourne
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK.,Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Warneford Hospital, Oxford, UK
| | - Alexander Smith
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK
| | - Catherine H Harmer
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK.,Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Warneford Hospital, Oxford, UK
| | - Anna C Nobre
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Warneford Hospital, Oxford, UK.,Department of Experimental Psychology, University of Oxford, New Radcliffe House, Oxford, UK
| | - Jennifer Rendell
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK
| | - Helen Jones
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK
| | - Christopher Hinds
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Big Data Institute, University of Oxford, Old Road Campus, Oxford, UK
| | - Arne Mould
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK
| | - Elizabeth M Tunbridge
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK
| | - Andrea Cipriani
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK
| | - John R Geddes
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK.,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK
| | - Kate E A Saunders
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK. .,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK.
| | - Paul J Harrison
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX, UK. .,Oxford Health Foundation NHS Trust, Warneford Hospital, Oxford, UK. .,Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Warneford Hospital, Oxford, UK.
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31
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Prieler T, Wood C, Thomson JM. Developing a Visual Attention Assessment for Children at School Entry. Front Psychol 2018; 9:2496. [PMID: 30581408 PMCID: PMC6293024 DOI: 10.3389/fpsyg.2018.02496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 11/23/2018] [Indexed: 11/16/2022] Open
Abstract
Whereas young children’s visual attention has been explored in a number of previous studies, so far it has not been investigated by an assessment based on Bundesen’s Theory of Visual Attention (TVA). TVA is a prominent visual attention model that has been widely used as foundation in studies targeting older children, adolescents or adults. In this paper we explore the utility of adopting TVA to explore the visual attention of 4- to 5- year olds and present the development of a simplified adapted version of a TVA-based assessment designed for this age group. Key assessment alterations included the substitution of letter stimuli with black and white symbols and the reduction of assessment duration. The suitability of the assessment for the target age group was subsequently tested in two consecutive studies (Study I: N = 43; Study II: N = 24). Study results show that measuring visual attention based on a simplified TVA-based assessment appears feasible in such a young age group, provided that the study design takes into account the capabilities of these young children. The authors argue that by adopting this kind of visual attention assessment the relationship between visual attention development and early learning could be better understood.
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Affiliation(s)
- Tanja Prieler
- Department of Human Communication Sciences, The University of Sheffield, Sheffield, United Kingdom
| | - Clare Wood
- Department of Psychology, Nottingham Trent University, Nottingham, United Kingdom
| | - Jenny M Thomson
- Department of Human Communication Sciences, The University of Sheffield, Sheffield, United Kingdom
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32
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Richard G, Kolskår K, Sanders AM, Kaufmann T, Petersen A, Doan NT, Monereo Sánchez J, Alnæs D, Ulrichsen KM, Dørum ES, Andreassen OA, Nordvik JE, Westlye LT. Assessing distinct patterns of cognitive aging using tissue-specific brain age prediction based on diffusion tensor imaging and brain morphometry. PeerJ 2018; 6:e5908. [PMID: 30533290 PMCID: PMC6276592 DOI: 10.7717/peerj.5908] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 10/10/2018] [Indexed: 01/26/2023] Open
Abstract
Multimodal imaging enables sensitive measures of the architecture and integrity of the human brain, but the high-dimensional nature of advanced brain imaging features poses inherent challenges for the analyses and interpretations. Multivariate age prediction reduces the dimensionality to one biologically informative summary measure with potential for assessing deviations from normal lifespan trajectories. A number of studies documented remarkably accurate age prediction, but the differential age trajectories and the cognitive sensitivity of distinct brain tissue classes have yet to be adequately characterized. Exploring differential brain age models driven by tissue-specific classifiers provides a hitherto unexplored opportunity to disentangle independent sources of heterogeneity in brain biology. We trained machine-learning models to estimate brain age using various combinations of FreeSurfer based morphometry and diffusion tensor imaging based indices of white matter microstructure in 612 healthy controls aged 18-87 years. To compare the tissue-specific brain ages and their cognitive sensitivity, we applied each of the 11 models in an independent and cognitively well-characterized sample (n = 265, 20-88 years). Correlations between true and estimated age and mean absolute error (MAE) in our test sample were highest for the most comprehensive brain morphometry (r = 0.83, CI:0.78-0.86, MAE = 6.76 years) and white matter microstructure (r = 0.79, CI:0.74-0.83, MAE = 7.28 years) models, confirming sensitivity and generalizability. The deviance from the chronological age were sensitive to performance on several cognitive tests for various models, including spatial Stroop and symbol coding, indicating poorer performance in individuals with an over-estimated age. Tissue-specific brain age models provide sensitive measures of brain integrity, with implications for the study of a range of brain disorders.
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Affiliation(s)
- Geneviève Richard
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Knut Kolskår
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Anne-Marthe Sanders
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Tobias Kaufmann
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Anders Petersen
- Center for Visual Cognition, Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Nhat Trung Doan
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Jennifer Monereo Sánchez
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Dag Alnæs
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Kristine M. Ulrichsen
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Erlend S. Dørum
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
- Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Ole A. Andreassen
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | | | - Lars T. Westlye
- NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
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33
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Beyond time and space: The effect of a lateralized sustained attention task and brain stimulation on spatial and selective attention. Cortex 2018; 107:131-147. [DOI: 10.1016/j.cortex.2017.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 06/23/2017] [Accepted: 09/23/2017] [Indexed: 11/19/2022]
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34
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Künstler ECS, Penning MD, Napiórkowski N, Klingner CM, Witte OW, Müller HJ, Bublak P, Finke K. Dual Task Effects on Visual Attention Capacity in Normal Aging. Front Psychol 2018; 9:1564. [PMID: 30233452 PMCID: PMC6129777 DOI: 10.3389/fpsyg.2018.01564] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 08/06/2018] [Indexed: 11/13/2022] Open
Abstract
Older adults show higher dual task performance decrements than younger adults. While this is assumed to be related to attentional capacity reductions, the precise affected functions are not specified. Such specification is, however, possible based on the "theory of visual attention" (TVA) which allows for modeling of distinct attentional capacity parameters. Furthermore, it is unclear whether older adults show qualitatively different attentional effects or whether they show the same effects as younger adults experience under more challenging conditions. By varying the complexity of the secondary task, it is possible to address this question. In our study, participants performed a verbal whole report of briefly presented letter arrays. TVA-based fitting of report performance delivered parameters of visual threshold t0, processing speed C, and visual short-term memory (VSTM) storage capacity K. Furthermore, participants performed a concurrent motor task consisting of continuous tapping of a (simple or complex) sequence. Both TVA and tapping tasks were performed under single and dual task conditions. Two groups of 30 younger adults each performed either the simple or complex tapping, and a group of 30 older adults performed the simple tapping condition. In older participants, VSTM storage capacity declined under dual task conditions. While no such effect was found in younger subjects performing the simple tapping sequence under dual task conditions, the younger group performing the complex tapping task under dual task conditions also showed a significant VSTM capacity reduction. Generally, no significant effect on other TVA parameters or on tapping accuracy was found. Comparable goodness-of-fit measures were obtained for the TVA modeling data in single and dual tasks, indicating that tasks were executed in a qualitatively similar, continuous manner, although quantitatively less efficiently under dual- compared to single-task conditions. Taken together, our results show that the age-specific effects of motor-cognitive dual task interference are reflected by a stronger decline of VSTM storage capacity. They support an interpretation of VSTM as central attentional capacity, which is shared across visual uptake and concurrent motor performance. Capacity limits are reached earlier, and already under lower motor task complexity, in older compared to younger adults.
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Affiliation(s)
| | - Melanie D. Penning
- Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Natan Napiórkowski
- Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Carsten M. Klingner
- Hans Berger Department of Neurology, Jena University Hospital, Jena, Germany
| | - Otto W. Witte
- Hans Berger Department of Neurology, Jena University Hospital, Jena, Germany
| | - Hermann J. Müller
- Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Peter Bublak
- Hans Berger Department of Neurology, Jena University Hospital, Jena, Germany
| | - Kathrin Finke
- Hans Berger Department of Neurology, Jena University Hospital, Jena, Germany
- Department of Psychology, Ludwig-Maximilians-Universität München, Munich, Germany
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35
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The Dorsolateral Prefrontal Cortex, a Dynamic Cortical Area to Enhance Top-Down Attentional Control. J Neurosci 2018; 37:3445-3446. [PMID: 28356395 DOI: 10.1523/jneurosci.0136-17.2017] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 02/26/2017] [Accepted: 02/28/2017] [Indexed: 11/21/2022] Open
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36
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Ruiz-Rizzo AL, Neitzel J, Müller HJ, Sorg C, Finke K. Distinctive Correspondence Between Separable Visual Attention Functions and Intrinsic Brain Networks. Front Hum Neurosci 2018; 12:89. [PMID: 29662444 PMCID: PMC5890144 DOI: 10.3389/fnhum.2018.00089] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 02/23/2018] [Indexed: 02/04/2023] Open
Abstract
Separable visual attention functions are assumed to rely on distinct but interacting neural mechanisms. Bundesen's “theory of visual attention” (TVA) allows the mathematical estimation of independent parameters that characterize individuals' visual attentional capacity (i.e., visual processing speed and visual short-term memory storage capacity) and selectivity functions (i.e., top-down control and spatial laterality). However, it is unclear whether these parameters distinctively map onto different brain networks obtained from intrinsic functional connectivity, which organizes slowly fluctuating ongoing brain activity. In our study, 31 demographically homogeneous healthy young participants performed whole- and partial-report tasks and underwent resting-state functional magnetic resonance imaging (rs-fMRI). Report accuracy was modeled using TVA to estimate, individually, the four TVA parameters. Networks encompassing cortical areas relevant for visual attention were derived from independent component analysis of rs-fMRI data: visual, executive control, right and left frontoparietal, and ventral and dorsal attention networks. Two TVA parameters were mapped on particular functional networks. First, participants with higher (vs. lower) visual processing speed showed lower functional connectivity within the ventral attention network. Second, participants with more (vs. less) efficient top-down control showed higher functional connectivity within the dorsal attention network and lower functional connectivity within the visual network. Additionally, higher performance was associated with higher functional connectivity between networks: specifically, between the ventral attention and right frontoparietal networks for visual processing speed, and between the visual and executive control networks for top-down control. The higher inter-network functional connectivity was related to lower intra-network connectivity. These results demonstrate that separable visual attention parameters that are assumed to constitute relatively stable traits correspond distinctly to the functional connectivity both within and between particular functional networks. This implies that individual differences in basic attention functions are represented by differences in the coherence of slowly fluctuating brain activity.
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Affiliation(s)
- Adriana L Ruiz-Rizzo
- Department of General and Experimental Psychology, Ludwig-Maximilians-Universität München, Munich, Germany.,Graduate School of Systemic Neurosciences, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Julia Neitzel
- Department of General and Experimental Psychology, Ludwig-Maximilians-Universität München, Munich, Germany.,Department of Neuroradiology, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Hermann J Müller
- Department of General and Experimental Psychology, Ludwig-Maximilians-Universität München, Munich, Germany.,School of Psychological Science, Birkbeck College, University of London, London, United Kingdom
| | - Christian Sorg
- Graduate School of Systemic Neurosciences, Ludwig-Maximilians-Universität München, Munich, Germany.,Department of Neuroradiology, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Kathrin Finke
- Department of General and Experimental Psychology, Ludwig-Maximilians-Universität München, Munich, Germany.,Graduate School of Systemic Neurosciences, Ludwig-Maximilians-Universität München, Munich, Germany.,Hans-Berger Department of Neurology, Friedrich Schiller University Jena, Jena, Germany
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37
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Wang T, Gillebert CR. TVA-Based Assessment of Visual Attention Using Line-Drawings of Fruits and Vegetables. Front Psychol 2018; 9:207. [PMID: 29535660 PMCID: PMC5835087 DOI: 10.3389/fpsyg.2018.00207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 02/07/2018] [Indexed: 11/13/2022] Open
Abstract
Visuospatial attention and short-term memory allow us to prioritize, select, and briefly maintain part of the visual information that reaches our senses. These cognitive abilities are quantitatively accounted for by Bundesen's theory of visual attention (TVA; Bundesen, 1990). Previous studies have suggested that TVA-based assessments are sensitive to inter-individual differences in spatial bias, visual short-term memory capacity, top-down control, and processing speed in healthy volunteers as well as in patients with various neurological and psychiatric conditions. However, most neuropsychological assessments of attention and executive functions, including TVA-based assessment, make use of alphanumeric stimuli and/or are performed verbally, which can pose difficulties for individuals who have troubles processing letters or numbers. Here we examined the reliability of TVA-based assessments when stimuli are used that are not alphanumeric, but instead based on line-drawings of fruits and vegetables. We compared five TVA parameters quantifying the aforementioned cognitive abilities, obtained by modeling accuracy data on a whole/partial report paradigm using conventional alphabet stimuli versus the food stimuli. Significant correlations were found for all TVA parameters, indicating a high parallel-form reliability. Split-half correlations assessing internal reliability, and correlations between predicted and observed data assessing goodness-of-fit were both significant. Our results provide an indication that line-drawings of fruits and vegetables can be used for a reliable assessment of attention and short-term memory.
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Affiliation(s)
- Tianlu Wang
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
| | - Celine R. Gillebert
- Department of Brain and Cognition, KU Leuven, Leuven, Belgium
- Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom
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38
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Nielsen SKK, Hageman I, Petersen A, Daniel SIF, Lau M, Winding C, Wolitzky-Taylor KB, Steele H, Vangkilde S. Do emotion regulation, attentional control, and attachment style predict response to cognitive behavioral therapy for anxiety disorders? – an investigation in clinical settings. Psychother Res 2018; 29:999-1009. [DOI: 10.1080/10503307.2018.1425933] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
| | - Ida Hageman
- Copenhagen University Hospital, Copenhagen, Denmark
| | - Anders Petersen
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | | | - Marianne Lau
- Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark
| | - Clas Winding
- Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark
| | - Kate B Wolitzky-Taylor
- Department of Psychiatry and Biobehavioral Sciences, Semel Institute, University of California-Los Angeles, Los Angeles, CA, USA
| | - Howard Steele
- Psychology Department, New School of Social Research, New York, NY, USA
| | - Signe Vangkilde
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
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39
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Ultrahigh temporal resolution of visual presentation using gaming monitors and G-Sync. Behav Res Methods 2018; 50:26-38. [DOI: 10.3758/s13428-017-1003-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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Wiegand I, Napiórkowski N, Töllner T, Petersen A, Habekost T, Müller HJ, Finke K. Event-related Electroencephalographic Lateralizations Mark Individual Differences in Spatial and Nonspatial Visual Selection. J Cogn Neurosci 2017; 30:482-497. [PMID: 29244636 DOI: 10.1162/jocn_a_01221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Selective attention controls the distribution of our visual system's limited processing resources to stimuli in the visual field. Two independent parameters of visual selection can be quantified by modeling an individual's performance in a partial-report task based on the computational theory of visual attention (TVA): (i) top-down control α, the relative attentional weighting of relevant over irrelevant stimuli, and (ii) spatial bias wλ, the relative attentional weighting of stimuli in the left versus right hemifield. In this study, we found that visual event-related electroencephalographic lateralizations marked interindividual differences in these two functions. First, individuals with better top-down control showed higher amplitudes of the posterior contralateral negativity than individuals with poorer top-down control. Second, differences in spatial bias were reflected in asymmetries in earlier visual event-related lateralizations depending on the hemifield position of targets; specifically, individuals showed a positivity contralateral to targets presented in their prioritized hemifield and a negativity contralateral to targets presented in their nonprioritized hemifield. Thus, our findings demonstrate that two functionally different aspects of attentional weighting quantified in the respective TVA parameters are reflected in two different neurophysiological measures: The observer-dependent spatial bias influences selection by a bottom-up processing advantage of stimuli appearing in the prioritized hemifield. By contrast, task-related target selection governed by top-down control involves active enhancement of target, and/or suppression of distractor, processing. These results confirm basic assumptions of the TVA framework, complement the functional interpretation of event-related lateralization components in selective attention studies, and are of relevance for the development of neurocognitive attentional assessment procedures.
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Affiliation(s)
- Iris Wiegand
- Max Planck UCL Centre for Computational Psychiatry and Ageing Research.,Max Planck Institute for Human Development.,Brigham and Women's Hospital and Harvard Medical School
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41
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Künstler ECS, Finke K, Günther A, Klingner C, Witte O, Bublak P. Motor-cognitive dual-task performance: effects of a concurrent motor task on distinct components of visual processing capacity. PSYCHOLOGICAL RESEARCH 2017; 82:177-185. [PMID: 29196834 PMCID: PMC5816117 DOI: 10.1007/s00426-017-0951-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 11/22/2017] [Indexed: 11/26/2022]
Abstract
Dual tasking, or the simultaneous execution of two continuous tasks, is frequently associated with a performance decline that can be explained within a capacity sharing framework. In this study, we assessed the effects of a concurrent motor task on the efficiency of visual information uptake based on the 'theory of visual attention' (TVA). TVA provides parameter estimates reflecting distinct components of visual processing capacity: perceptual threshold, visual processing speed, and visual short-term memory (VSTM) storage capacity. Moreover, goodness-of-fit values and bootstrapping estimates were derived to test whether the TVA-model is validly applicable also under dual task conditions, and whether the robustness of parameter estimates is comparable in single- and dual-task conditions. 24 subjects of middle to higher age performed a continuous tapping task, and a visual processing task (whole report of briefly presented letter arrays) under both single- and dual-task conditions. Results suggest a decline of both visual processing capacity and VSTM storage capacity under dual-task conditions, while the perceptual threshold remained unaffected by a concurrent motor task. In addition, goodness-of-fit values and bootstrapping estimates support the notion that participants processed the visual task in a qualitatively comparable, although quantitatively less efficient way under dual-task conditions. The results support a capacity sharing account of motor-cognitive dual tasking and suggest that even performing a relatively simple motor task relies on central attentional capacity that is necessary for efficient visual information uptake.
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Affiliation(s)
- E C S Künstler
- Hans Berger Department of Neurology, Jena University Hospital, Am Klinikum 1, 07747, Jena, Germany.
| | - K Finke
- Hans Berger Department of Neurology, Jena University Hospital, Am Klinikum 1, 07747, Jena, Germany
| | - A Günther
- Hans Berger Department of Neurology, Jena University Hospital, Am Klinikum 1, 07747, Jena, Germany
| | - C Klingner
- Hans Berger Department of Neurology, Jena University Hospital, Am Klinikum 1, 07747, Jena, Germany
| | - O Witte
- Hans Berger Department of Neurology, Jena University Hospital, Am Klinikum 1, 07747, Jena, Germany
| | - P Bublak
- Hans Berger Department of Neurology, Jena University Hospital, Am Klinikum 1, 07747, Jena, Germany
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42
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Finsterwalder S, Demeyere N, Gillebert CR. Deficit in feature-based attention following a left thalamic lesion. Neuropsychologia 2017; 102:1-10. [PMID: 28549936 PMCID: PMC5555441 DOI: 10.1016/j.neuropsychologia.2017.05.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 04/30/2017] [Accepted: 05/22/2017] [Indexed: 11/24/2022]
Abstract
Selective attention enables us to prioritise the processing of relevant over irrelevant information. The model of priority maps with stored attention weights provides a conceptual framework that accounts for the visual prioritisation mechanism of selective attention. According to this model, high attention weights can be assigned to spatial locations, features, or objects. Converging evidence from neuroimaging and neuropsychological studies propose the involvement of thalamic and frontoparietal areas in selective attention. However, it is unclear whether the thalamus is critically involved in generating different types of modulatory signals for attentional selection. The aim of the current study was to investigate feature- and spatial-based selection in stroke survivors with subcortical thalamic and non-thalamic lesions. A single case with a left-hemispheric lesion extending into the thalamus, five cases with right-hemispheric lesions sparing the thalamus and 34 healthy, age-matched controls participated in the study. Participants performed a go/no-go task on task-relevant stimuli, while ignoring simultaneously presented task-irrelevant stimuli. Stimulus relevance was determined by colour or spatial location. The thalamic lesion case was specifically impaired in feature-based selection but not in spatial-based selection, whereas performance of non-thalamic lesion patients was similar to controls' performance in both types of selective attention. In summary, our thalamic lesion case showed difficulties in computing differential attention weights based on features, but not based on spatial locations. The results suggest that different modulatory signals are generated mediating attentional selection for features versus space in the thalamus.
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Affiliation(s)
- Sofia Finsterwalder
- Oxford Cognitive Neuropsychology Centre, Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom; Laboratory of Experimental Psychology, Department of Brain & Cognition, University of Leuven, Leuven, Belgium
| | - Nele Demeyere
- Oxford Cognitive Neuropsychology Centre, Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom
| | - Celine R Gillebert
- Oxford Cognitive Neuropsychology Centre, Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom; Laboratory of Experimental Psychology, Department of Brain & Cognition, University of Leuven, Leuven, Belgium.
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43
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Jørgensen SH, Fitzpatrick CM, Gether U, Woldbye DPD, Sørensen AT. Chemogenetic Modulation of G Protein-Coupled Receptor Signalling in Visual Attention Research. Basic Clin Pharmacol Toxicol 2017; 121:373-381. [PMID: 28609587 DOI: 10.1111/bcpt.12819] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/28/2017] [Indexed: 02/01/2023]
Abstract
Attention is a fundamental cognitive process involved in nearly all aspects of life. Abnormal attentional control is a symptom of many neurological disorders, most notably recognized in ADHD (attention deficit hyperactivity disorder). Although attentional performance and its malfunction has been a major area of investigation, it has proven difficult to accurately associate specific neuronal projections, cell types, neurotransmitter systems and receptors with distinct phenotypes owing to its complexity. In this MiniReview, we present a recently invented technology known as Designer Receptors Exclusively Activated by Designer Drugs (DREADDs). The DREADD technology is an emerging and transformative method that allows selective manipulation of G protein-coupled receptor (GPCR) signalling, and its broad-ranging usefulness in attention research is now beginning to emerge. We first describe the different DREADDs available and explain how unprecedented specificity of neuronal signalling can be achieved using DREADDs. We next discuss various studies performed in animal models of visual attention, where different brain regions and neuronal populations have been probed by DREADDs. We highlight the interplay between the dopamine (DA) and noradrenaline (NA) catecholamine systems in visual attention and explain why DREADD technology can untangle and help us better understand such complex systems in normal and malfunctioning conditions.
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Affiliation(s)
- Søren H Jørgensen
- Molecular Neuropharmacology and Genetics Laboratory, Center for Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | | | - Ulrik Gether
- Molecular Neuropharmacology and Genetics Laboratory, Center for Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | - David P D Woldbye
- Molecular Neuropharmacology and Genetics Laboratory, Center for Neuroscience, University of Copenhagen, Copenhagen, Denmark.,Laboratory of Neural Plasticity, Center for Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | - Andreas T Sørensen
- Molecular Neuropharmacology and Genetics Laboratory, Center for Neuroscience, University of Copenhagen, Copenhagen, Denmark
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44
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Measuring and modeling salience with the theory of visual attention. Atten Percept Psychophys 2017; 79:1593-1614. [PMID: 28537010 DOI: 10.3758/s13414-017-1325-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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45
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Fitzpatrick CM, Caballero-Puntiverio M, Gether U, Habekost T, Bundesen C, Vangkilde S, Woldbye DPD, Andreasen JT, Petersen A. Theory of Visual Attention (TVA) applied to mice in the 5-choice serial reaction time task. Psychopharmacology (Berl) 2017; 234:845-855. [PMID: 28070619 DOI: 10.1007/s00213-016-4520-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 12/21/2016] [Indexed: 12/14/2022]
Abstract
RATIONALE The 5-choice serial reaction time task (5-CSRTT) is widely used to measure rodent attentional functions. In humans, many attention studies in healthy and clinical populations have used testing based on Bundesen's Theory of Visual Attention (TVA) to estimate visual processing speeds and other parameters of attentional capacity. OBJECTIVES We aimed to bridge these research fields by modifying the 5-CSRTT's design and by mathematically modelling data to derive attentional parameters analogous to human TVA-based measures. METHODS C57BL/6 mice were tested in two 1-h sessions on consecutive days with a version of the 5-CSRTT where stimulus duration (SD) probe length was varied based on information from previous TVA studies. Thereafter, a scopolamine hydrobromide (HBr; 0.125 or 0.25 mg/kg) pharmacological challenge was undertaken, using a Latin square design. Mean score values were modelled using a new three-parameter version of TVA to obtain estimates of visual processing speeds, visual thresholds and motor response baselines in each mouse. RESULTS The parameter estimates for each animal were reliable across sessions, showing that the data were stable enough to support analysis on an individual level. Scopolamine HBr dose-dependently reduced 5-CSRTT attentional performance while also increasing reward collection latency at the highest dose. Upon TVA modelling, scopolamine HBr significantly reduced visual processing speed at both doses, while having less pronounced effects on visual thresholds and motor response baselines. CONCLUSIONS This study shows for the first time how 5-CSRTT performance in mice can be mathematically modelled to yield estimates of attentional capacity that are directly comparable to estimates from human studies.
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Affiliation(s)
- C M Fitzpatrick
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark.
| | - M Caballero-Puntiverio
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark
| | - U Gether
- Molecular Neuropharmacology and Genetics Laboratory, Department of Neuroscience and Pharmacology, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark
| | - T Habekost
- Center for Visual Cognition, Department of Psychology, University of Copenhagen, Øster Farimagsgade 2A, 1353, Copenhagen, Denmark
| | - C Bundesen
- Center for Visual Cognition, Department of Psychology, University of Copenhagen, Øster Farimagsgade 2A, 1353, Copenhagen, Denmark
| | - S Vangkilde
- Center for Visual Cognition, Department of Psychology, University of Copenhagen, Øster Farimagsgade 2A, 1353, Copenhagen, Denmark
| | - D P D Woldbye
- Laboratory of Neural Plasticity, Department of Neuroscience and Pharmacology, University of Copenhagen, 3 Blegdamsvej, 2200, Copenhagen, Denmark
| | - J T Andreasen
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark
| | - A Petersen
- Center for Visual Cognition, Department of Psychology, University of Copenhagen, Øster Farimagsgade 2A, 1353, Copenhagen, Denmark
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46
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Klargaard SK, Starrfelt R, Petersen A, Gerlach C. Topographic processing in developmental prosopagnosia: Preserved perception but impaired memory of scenes. Cogn Neuropsychol 2016; 33:405-413. [DOI: 10.1080/02643294.2016.1267000] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Solja K. Klargaard
- Department of Psychology, University of Southern Denmark, Odense, Denmark
| | - Randi Starrfelt
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Anders Petersen
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Christian Gerlach
- Department of Psychology, University of Southern Denmark, Odense, Denmark
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47
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Sand K, Habekost T, Petersen A, Starrfelt R. The Word Superiority Effect in central and peripheral vision. VISUAL COGNITION 2016. [DOI: 10.1080/13506285.2016.1259192] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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48
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Foerster RM, Poth CH, Behler C, Botsch M, Schneider WX. Using the virtual reality device Oculus Rift for neuropsychological assessment of visual processing capabilities. Sci Rep 2016; 6:37016. [PMID: 27869220 PMCID: PMC5116630 DOI: 10.1038/srep37016] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 10/24/2016] [Indexed: 11/20/2022] Open
Abstract
Neuropsychological assessment of human visual processing capabilities strongly depends on visual testing conditions including room lighting, stimuli, and viewing-distance. This limits standardization, threatens reliability, and prevents the assessment of core visual functions such as visual processing speed. Increasingly available virtual reality devices allow to address these problems. One such device is the portable, light-weight, and easy-to-use Oculus Rift. It is head-mounted and covers the entire visual field, thereby shielding and standardizing the visual stimulation. A fundamental prerequisite to use Oculus Rift for neuropsychological assessment is sufficient test-retest reliability. Here, we compare the test-retest reliabilities of Bundesen’s visual processing components (visual processing speed, threshold of conscious perception, capacity of visual working memory) as measured with Oculus Rift and a standard CRT computer screen. Our results show that Oculus Rift allows to measure the processing components as reliably as the standard CRT. This means that Oculus Rift is applicable for standardized and reliable assessment and diagnosis of elementary cognitive functions in laboratory and clinical settings. Oculus Rift thus provides the opportunity to compare visual processing components between individuals and institutions and to establish statistical norm distributions.
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Affiliation(s)
- Rebecca M Foerster
- Neuro-cognitive Psychology, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany.,Cluster of Excellence Cognitive Interaction Technology, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany
| | - Christian H Poth
- Neuro-cognitive Psychology, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany.,Cluster of Excellence Cognitive Interaction Technology, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany
| | - Christian Behler
- Cluster of Excellence Cognitive Interaction Technology, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany.,Computer Graphics and Geometry Processing, Bielefeld University,P. O. Box 100131, D-33501 Bielefeld, Germany
| | - Mario Botsch
- Cluster of Excellence Cognitive Interaction Technology, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany.,Computer Graphics and Geometry Processing, Bielefeld University,P. O. Box 100131, D-33501 Bielefeld, Germany
| | - Werner X Schneider
- Neuro-cognitive Psychology, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany.,Cluster of Excellence Cognitive Interaction Technology, Bielefeld University, P. O. Box 100131, D-33501 Bielefeld, Germany
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49
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Visual attention in posterior stroke and relations to alexia. Neuropsychologia 2016; 92:79-89. [DOI: 10.1016/j.neuropsychologia.2016.02.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/29/2016] [Accepted: 02/29/2016] [Indexed: 11/22/2022]
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50
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Neitzel J, Ortner M, Haupt M, Redel P, Grimmer T, Yakushev I, Drzezga A, Bublak P, Preul C, Sorg C, Finke K. Neuro-cognitive mechanisms of simultanagnosia in patients with posterior cortical atrophy. Brain 2016; 139:3267-3280. [DOI: 10.1093/brain/aww235] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 07/01/2016] [Accepted: 07/31/2016] [Indexed: 11/13/2022] Open
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