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Diao H, Ma J, Jia Y, Jia H, Wei K. Abnormalities in motor adaptation to different types of perturbations in schizophreniaperturbations in schizophrenia. Schizophr Res 2024; 267:291-300. [PMID: 38599141 DOI: 10.1016/j.schres.2024.03.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 03/20/2024] [Accepted: 03/31/2024] [Indexed: 04/12/2024]
Abstract
Schizophrenia is a mental health disorder that often includes psychomotor disturbances, impacting how individuals adjust their motor output based on the cause of motor errors. While previous motor adaptation studies on individuals with schizophrenia have largely focused on large and consistent perturbations induced by abrupt experimental manipulations, such as donning prism goggles, the adaptation process to random perturbations, either caused by intrinsic motor noise or external disturbances, has not been examined - despite its ecological relevance. Here, we used a unified behavioral task paradigm to examine motor adaptation to perturbations of three causal structures among individuals in the remission stage of schizophrenia, youth with ultra-high risk of psychosis, adults with active symptoms, and age-matched controls. Results showed that individuals with schizophrenia had reduced trial-by-trial adaptation and large error variance when adapting to their own motor noise. When adapting to random but salient perturbations, they showed intact adaptation and normal causal inference of errors. This contrasted with reduced adaptation to large yet consistent perturbations, which could reflect difficulties in forming cognitive strategies rather than the often-assumed impairments in procedural learning or sense of agency. Furthermore, the observed adaptation effects were correlated with the severity of positive symptoms across the diagnosis groups. Our findings suggest that individuals with schizophrenia face challenges in accommodating intrinsic perturbations when motor errors are ambiguous but adapt with intact causal attribution when errors are salient.
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Affiliation(s)
- Henan Diao
- Beijing Key Laboratory of Behavior and Mental Health, School of Psychological and Cognitive Sciences, Peking University, Beijing 100080, China; Key Laboratory of Machine Perception (Ministry of Education), Peking University, Beijing 10080, China
| | - Jiajun Ma
- Beijing Key Laboratory of Behavior and Mental Health, School of Psychological and Cognitive Sciences, Peking University, Beijing 100080, China; Key Laboratory of Machine Perception (Ministry of Education), Peking University, Beijing 10080, China
| | - Yuan Jia
- The National Clinical Research Center for Mental Disorders, Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing 100088, China; Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100088, China
| | - Hongxiao Jia
- The National Clinical Research Center for Mental Disorders, Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing 100088, China; Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100088, China.
| | - Kunlin Wei
- Beijing Key Laboratory of Behavior and Mental Health, School of Psychological and Cognitive Sciences, Peking University, Beijing 100080, China; Key Laboratory of Machine Perception (Ministry of Education), Peking University, Beijing 10080, China.
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2
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Karamaouna P, Zouraraki C, Economou E, Kafetsios K, Bitsios P, Giakoumaki SG. Cold executive function processes and their hot analogs in schizotypy. J Int Neuropsychol Soc 2024; 30:285-294. [PMID: 37750805 DOI: 10.1017/s1355617723000590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
OBJECTIVE To examine cold (based on logical reasoning) versus hot (having emotional components) executive function processes in groups with high individual schizotypal traits. METHOD Two-hundred and forty-seven participants were administered the Schizotypal Personality Questionnaire and were allocated into schizotypal (cognitive-perceptual, paranoid, negative, disorganized) or control groups according to pre-specified criteria. Participants were also administered a battery of tasks examining working memory, complex selective attention, response inhibition, decision-making and fluid intelligence and their affective counterparts. The outcome measures of each task were reduced to one composite variable thus formulating five cold and five hot cognitive domains. Between-group differences in the cognitive domains were examined with repeated measures analyses of covariance. RESULTS For working memory, the control and the cognitive-perceptual groups outperformed negative schizotypes, while for affective working memory controls outperformed the disorganized group. Controls also scored higher compared with the disorganized group in complex selective attention, while both the control and the cognitive-perceptual groups outperformed negative schizotypes in complex affective selective attention. Negative schizotypes also had striking difficulties in response inhibition, as they scored lower compared with all other groups. Despite the lack of differences in fluid intelligence, controls scored higher compared with all schizotypal groups (except from cognitive-perceptual schizotypes) in emotional intelligence; the latter group reported higher emotional intelligence compared with negative schizotypes. CONCLUSION Results indicate that there is no categorical association between the different schizotypal dimensions with solely cold or hot executive function processes and support impoverished emotional intelligence as a core feature of schizotypy.
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Affiliation(s)
- Penny Karamaouna
- Laboratory of Neuropsychology, Department of Psychology, School of Social Sciences, University of Crete, Rethymno, Crete, Greece
- University of Crete Research Center for the Humanities, the Social and Education Sciences (UCRC), University of Crete, Rethymno, Crete, Greece
| | - Chrysoula Zouraraki
- Laboratory of Neuropsychology, Department of Psychology, School of Social Sciences, University of Crete, Rethymno, Crete, Greece
- University of Crete Research Center for the Humanities, the Social and Education Sciences (UCRC), University of Crete, Rethymno, Crete, Greece
| | - Elias Economou
- Laboratory of Experimental Psychology, Department of Psychology, School of Social Sciences, University of Crete, Rethymno, Crete, Greece
| | | | - Panos Bitsios
- Department of Psychiatry and Behavioural Sciences, Faculty of Medicine, University of Crete, Heraklion, Crete, Greece
| | - Stella G Giakoumaki
- Laboratory of Neuropsychology, Department of Psychology, School of Social Sciences, University of Crete, Rethymno, Crete, Greece
- University of Crete Research Center for the Humanities, the Social and Education Sciences (UCRC), University of Crete, Rethymno, Crete, Greece
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3
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Crucianelli L, Reader AT, Ehrsson HH. Subcortical contributions to the sense of body ownership. Brain 2024; 147:390-405. [PMID: 37847057 PMCID: PMC10834261 DOI: 10.1093/brain/awad359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/01/2023] [Accepted: 10/03/2023] [Indexed: 10/18/2023] Open
Abstract
The sense of body ownership (i.e. the feeling that our body or its parts belong to us) plays a key role in bodily self-consciousness and is believed to stem from multisensory integration. Experimental paradigms such as the rubber hand illusion have been developed to allow the controlled manipulation of body ownership in laboratory settings, providing effective tools for investigating malleability in the sense of body ownership and the boundaries that distinguish self from other. Neuroimaging studies of body ownership converge on the involvement of several cortical regions, including the premotor cortex and posterior parietal cortex. However, relatively less attention has been paid to subcortical structures that may also contribute to body ownership perception, such as the cerebellum and putamen. Here, on the basis of neuroimaging and neuropsychological observations, we provide an overview of relevant subcortical regions and consider their potential role in generating and maintaining a sense of ownership over the body. We also suggest novel avenues for future research targeting the role of subcortical regions in making sense of the body as our own.
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Affiliation(s)
- Laura Crucianelli
- Department of Biological and Experimental Psychology, Queen Mary University of London, London E1 4DQ, UK
- Department of Neuroscience, Karolinska Institutet, Stockholm 171 65, Sweden
| | - Arran T Reader
- Department of Psychology, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, UK
| | - H Henrik Ehrsson
- Department of Neuroscience, Karolinska Institutet, Stockholm 171 65, Sweden
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Ye JY, Qin XJ, Cui JF, Jia LX, Shi HS, Yang TX, Lui SSY, Wang Y, Chan RCK. Mental time travel for self and others in individuals with a high level of schizotypy. Psych J 2023; 12:524-534. [PMID: 36653195 DOI: 10.1002/pchj.626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/28/2022] [Indexed: 01/20/2023]
Abstract
Mental time travel (MTT) is the ability to project oneself to the past or future through mental simulation. Moreover, MTT can involve self-related or other-related information. This study aimed to compare MTT in individuals with high levels of schizotypy and that in their counterparts with low levels of schizotypy. Participants with high (n = 37) and low (n = 37) levels of schizotypy completed an MTT task with four conditions [2 (Condition: self vs. other) × 2 (Time orientation: past vs. future)]. They were required to recall past events that had happened to themselves or to a non-intimate person, and to imagine possible future events that might happen to themselves or to a non-intimate person, related to cue words. Outcome measures included specificity, vividness, sense of experience, emotional valence, emotional intensity, proportion of first-person visual perspective in events, and difficulty in event generation. A 2 (Group: high vs. low levels of schizotypy) × 2 (Condition) × 2 (Time orientation) mixed analysis of variance was conducted on each index. Results showed that self-related MTT was more specific than other-related MTT in low levels of schizotypy participants but not in high levels of schizotypy participants. Participants with a high level of schizotypy reported fewer specific events, and reported events with lower vividness and positive emotion than did those with a low level of schizotypy. Self-related MTT showed higher levels of phenomenological characteristics than did other-related MTT. In conclusion, individuals with a high level of schizotypy have altered MTT, and cannot benefit from the self-advantage effect on the specificity of MTT.
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Affiliation(s)
- Jun-Yan Ye
- Neuropsychology and Applied Cognitive Neuroscience Lab, CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Xiao-Jing Qin
- Neuropsychology and Applied Cognitive Neuroscience Lab, CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Ji-Fang Cui
- Research Center for Information and Statistics, National Institute of Education Sciences, Beijing, China
| | - Lu-Xia Jia
- Neuropsychology and Applied Cognitive Neuroscience Lab, CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Hai-Song Shi
- North China Electric Power University, Beijing, China
| | - Tian-Xiao Yang
- Neuropsychology and Applied Cognitive Neuroscience Lab, CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Simon S Y Lui
- Department of Psychiatry, School of Clinical Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, Hong Kong, China
| | - Ya Wang
- Neuropsychology and Applied Cognitive Neuroscience Lab, CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Raymond C K Chan
- Neuropsychology and Applied Cognitive Neuroscience Lab, CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
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Haddad C, Sacre H, Abboche E, Salameh P, Calvet B. The self-assessment scale of cognitive complaints in Schizophrenia: validation of the Arabic version among a sample of lebanese patients. BMC Psychiatry 2023; 23:415. [PMID: 37296387 PMCID: PMC10257267 DOI: 10.1186/s12888-023-04925-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 06/05/2023] [Indexed: 06/12/2023] Open
Abstract
BACKGROUND Several subjective scales have been used to measure cognitive complaints in patients with schizophrenia, such as the Self-Assessment Scale of Cognitive Complaints in Schizophrenia (SASCCS), which was designed to be clear, simple, and easy to use. This study aimed to examine the ability of SASCCS as a validated tool to collect and assess subjective cognitive complaints of patients with schizophrenia. METHODS A cross-sectional study among 120 patients with schizophrenia was performed between July 2019 and Mars 2020 at the Psychiatric Hospital of the Cross, Lebanon. The SASCCS was used to assess how patients with schizophrenia perceived their cognitive impairment. RESULTS The internal consistency of the SASCCS scale was 0.911, and the intra-class correlation coefficient was 0.81 (p < 0.001), suggesting a good stability over time. The factor analysis of the SASCCS scale showed a 5-factor solution using the Varimax rotated matrix. The SASCCS total score positively correlated with their own factors. A negative correlation was found between the objective cognitive scale and subjective cognitive complaints, which were positively correlated with clinical symptoms and depression. No significant association was found between insight and subjective cognitive complaints. CONCLUSION The SASCCS scale showed appropriate psychometric properties, with high internal consistency, good construct validity, and adequate concurrent validity, which makes it valuable for the evaluation of subjective cognitive complaints in patients with schizophrenia.
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Affiliation(s)
- Chadia Haddad
- EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d'Epidémiologie et de Neurologie Tropicale, Inserm U1094, IRD UMR270, Univ. Limoges, CHU Limoges, OmegaHealth, Limoges, France.
- Institut National de Santé Publique, d'Épidémiologie Clinique et de Toxicologie-Liban (INSPECT-LB), Beirut, Lebanon.
- School of Medicine, Lebanese American University, Byblos, Lebanon.
- Research Department, Psychiatric Hospital of the Cross, Jal Eddib, Lebanon.
- School of Health Sciences, Modern University for Business and Science, Beirut, Lebanon.
| | - Hala Sacre
- Institut National de Santé Publique, d'Épidémiologie Clinique et de Toxicologie-Liban (INSPECT-LB), Beirut, Lebanon
| | - Elie Abboche
- Research Department, Psychiatric Hospital of the Cross, Jal Eddib, Lebanon
| | - Pascale Salameh
- Institut National de Santé Publique, d'Épidémiologie Clinique et de Toxicologie-Liban (INSPECT-LB), Beirut, Lebanon
- School of Medicine, Lebanese American University, Byblos, Lebanon
- Faculty of Pharmacy, Lebanese University, Hadat, Lebanon
- Department of Primary Care and Population Health, University of Nicosia Medical School, Egkomi, Nicosia, 2417, Cyprus
| | - Benjamin Calvet
- EpiMaCT - Epidémiologie des maladies chroniques en zone tropicale, Institut d'Epidémiologie et de Neurologie Tropicale, Inserm U1094, IRD UMR270, Univ. Limoges, CHU Limoges, OmegaHealth, Limoges, France
- Pôle Universitaire de Psychiatrie de l'Adulte et de la Personne Âgée, Centre Hospitalier Esquirol, Limoges, 87000, France
- Unité de Recherche et d'Innovation, Centre Hospitalier Esquirol, Limoges, 87000, France
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Barnby JM, Dayan P, Bell V. Formalising social representation to explain psychiatric symptoms. Trends Cogn Sci 2023; 27:317-332. [PMID: 36609016 DOI: 10.1016/j.tics.2022.12.004] [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: 10/06/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 01/06/2023]
Abstract
Recent work in social cognition has moved beyond a focus on how people process social rewards to examine how healthy people represent other agents and how this is altered in psychiatric disorders. However, formal modelling of social representation has not kept pace with these changes, impeding our understanding of how core aspects of social cognition function, and fail, in psychopathology. Here, we suggest that belief-based computational models provide a basis for an integrated sociocognitive approach to psychiatry, with the potential to address important but unexamined pathologies of social representation, such as maladaptive schemas and illusory social agents.
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Affiliation(s)
- Joseph M Barnby
- Social Computation and Cognitive Representation Lab, Department of Psychology, Royal Holloway, University of London, Egham TW20 0EX, UK.
| | - Peter Dayan
- Max Planck Institute for Biological Cybernetics, Tübingen, 72076, Germany; University of Tübingen, Tübingen, 72074, Germany
| | - Vaughan Bell
- Clinical, Educational, and Health Psychology, University College London, London WC1E 7HB, UK; South London and Maudsley NHS Foundation Trust, London SE5 8AZ, UK
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7
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Kassim FM, Mark Lim JH, Albrecht MA, Martin-Iverson MT. Dexamphetamine influences funneling illusion based on psychometric score. Hum Psychopharmacol 2023; 38:e2862. [PMID: 36799101 DOI: 10.1002/hup.2862] [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: 10/07/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 02/18/2023]
Abstract
OBJECTIVES Our team previously showed that like the experience of the rubber hand illusion (RHI) in people with schizophrenia and their offspring¸ dexamphetamine administration to healthy volunteers increases the stimulus binding windows (BWs) in RHI. It is not clear if similar expansions of BWs are present for unimodal illusions. Studies have also shown that subjective or objective effects of amphetamine would be linked to between-person variations in personality measures. Therefore, we aimed to examine the effect of dexamphetamine (DEX), a dopamine-releasing stimulant, on illusory perception using unimodal sensory stimuli (Tactile Funneling Illusion [TFI]) across both temporal and spatial variables. We further examined the relationship between changes in psychometric scores and changes in illusion perception induced by dexamphetamine. METHODS Healthy subjects (N = 20) participated in a randomized, double-blind, counter-balanced, placebo-controlled, cross-over study. The effects of dexamphetamine (0.45 mg/kg, PO, q.d.) on funneling and error of spatial localization (EL) were examined using TFI. Psychotomimetic effects were assessed using a battery of psychological measures. RESULTS Dexamphetamine did not significantly increased the funneling illusion (p = 0.88) or EL (p = 0.5), relative to placebo. However, the degree of change in psychometric scores following dexamphetamine positively correlated with changes in funneling (ρ = 0.48, p = 0.03, n = 20), mainly at 0 ms delay condition (ρ = 0.6, p = 0.004, n = 20). CONCLUSION Unlike multimodal illusions, alteration of BWs does not occur for unimodal illusions after administration of a dopamine-releasing agent. However, our findings indicate that moderate release of dopamine, through its psychotomimetic effect, indirectly influences unimodal illusion.
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Affiliation(s)
- Faiz M Kassim
- Neuropsychopharmacology Research Unit, School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - J H Mark Lim
- Neuropsychopharmacology Research Unit, School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Matthew A Albrecht
- Western Australian Centre for Road Safety Research, School of Psychological Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Mathew T Martin-Iverson
- Neuropsychopharmacology Research Unit, School of Biomedical Sciences, University of Western Australia, Perth, Western Australia, Australia
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Cammisuli DM, Castelnuovo G. Neuroscience-based psychotherapy: A position paper. Front Psychol 2023; 14:1101044. [PMID: 36860785 PMCID: PMC9968886 DOI: 10.3389/fpsyg.2023.1101044] [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: 11/17/2022] [Accepted: 01/11/2023] [Indexed: 02/15/2023] Open
Abstract
In the recent years, discoveries in neuroscience have greatly impacted upon the need to modify therapeutic practice starting from the evidence showing some cerebral mechanisms capable of coping with mental health crisis and traumatic events of the individual's life history by redesigning the narrative plot and the person's sense of the Self. The emerging dialogue between neuroscience and psychotherapy is increasingly intense and modern psychotherapy cannot ignore the heritage deriving from studies about neuropsychological modification of memory traces, neurobiology of attachment theory, cognitive mechanisms involved in psychopathology, neurophysiology of human empathy, neuroimaging evidence about psychotherapeutic treatment, and somatoform disorders connecting the brain and the body. In the present article, we critically examined sectorial literature and claimed that psychotherapy has to referred to a neuroscience-based approach in order to adopt the most tailored interventions for specific groups of patients or therapy settings. We also provided recommendations for care implementation in clinical practice and illustrated challenges of future research.
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Affiliation(s)
| | - Gianluca Castelnuovo
- Department of Psychology, Catholic University, Milan, Italy,Psychology Research Laboratory, Istituto Auxologico Italiano IRCCS, Milan, Italy,*Correspondence: Gianluca Castelnuovo ✉
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Wang Y, Yuan X. Chinese cognitive processing of ToM: Distinctions in understanding the mental states of self, close others, and strangers. Front Psychol 2023; 14:895545. [PMID: 36814647 PMCID: PMC9939515 DOI: 10.3389/fpsyg.2023.895545] [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: 03/14/2022] [Accepted: 01/17/2023] [Indexed: 02/08/2023] Open
Abstract
Previous studies showed that people differ in attributing mental states to themselves and in understanding the mental states of others, but have not explored the differences when people attribute mental states to others at different social distances. The present study adds a 'close other' condition to the Self/Other differentiation paradigm to explore the potential differences in attributing mental states to others with different social distances. It emerged that the time required to reflect on one's self mental state is shortest in mental state attribution, longer when comprehending the mental state of close others, and longest for strangers. This result indicates that Chinese participants distinguish between close others and strangers when performing perspective-taking. When the perspective-shifting of belief-attribution is performed, a beforehand processing of information about close others or strangers does not interfere with the processing of information from oneself subsequently. However, when the information processed in the previous stage cannot be used for subsequent processing, it interferes with the processing of information from close others or strangers in the later stage. The lower the degree of automated processing of pre-processed information, the greater the interference effect produced. This finding indicated that processing the self mental state is automatically activated, but comprehending the mental state of others is not. The comprehension of others' mental states occurs only when required by the task and it entails more cognitive resources to process and maintain.
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Affiliation(s)
- Yuanqing Wang
- School of Psychology, Nanjing Normal University, Nanjing, China
| | - Xiaojing Yuan
- School of Teacher Education, Nanjing Xiaozhuang University, Nanjing, China,*Correspondence: Xiaojing Yuan, ✉
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Abstract
Recent research suggests that embodiment sensations (sense of body ownership and sense of body agency) are altered in schizophrenia. Using a mirror box illusion setup, we tested if the anomalous embodiment experience depends on deficient processing of visuomotor synchrony, disrupted processing of movement mode, or both. The task required participants to press a lever with their index while looking at the image of the experimenter's hand moving on a similar lever. The illusion of embodiment could arise because looking toward the direction of their own hand the participant saw the reflection of the experimenter's hand visually superimposed to his own one through a mirror. During the illusion induction, we systematically varied visuomotor asynchrony (4 delays were imposed on the movement of the experimenter's hand) and the mode of movement (the participant could perform active vs. passive movements). The strength of the illusion of embodiment of the external hand was assessed with explicit judgments of ownership and agency. Patients' data showed an anomalous modulation of ownership with respect to visuomotor synchrony manipulation and an altered modulation of agency with respect to both visuomotor synchrony and movement mode manipulations. Results from the present study suggest that impairments affecting both the processing of temporal aspects of visuomotor signals and the processing of type of movement underlie anomalous embodiment sensations in schizophrenia. Hypotheses about potential deficits accounting for our results are proposed.
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Assaf R, Ouellet J, Bourque J, Stip E, Leyton M, Conrod P, Potvin S. A functional neuroimaging study of self-other processing alterations in atypical developmental trajectories of psychotic-like experiences. Sci Rep 2022; 12:16324. [PMID: 36175570 PMCID: PMC9522794 DOI: 10.1038/s41598-022-20129-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 09/08/2022] [Indexed: 11/09/2022] Open
Abstract
Self-disturbances constitute a hallmark of psychosis, but it remains unclear whether these alterations are present in at-risk populations, and therefore their role in the development of psychosis has yet to be confirmed. The present study addressed this question by measuring neural correlates of self-other processing in youth belonging to three developmental trajectories of psychotic experiences. Eighty-six youths were recruited from a longitudinal cohort of over 3800 adolescents based on their trajectories of Psychotic-Like Experiences from 12 to 16 years of age. Participants underwent neuroimaging at 17 years of age (mean). A functional neuroimaging task evaluating self- and other-related trait judgments was used to measure whole-brain activation and connectivity. Youth who showed an increasing trajectory displayed hypoactivation of the dorsomedial prefrontal cortex and hypoconnectivity with the cerebellum. By contrast, youth who showed a decreasing trajectory displayed decreased activation of the superior temporal gyrus, the inferior frontal gyrus, and the middle occipital gyrus. These findings suggest that the increasing trajectory is associated with alterations that might erode distinctions between self and other, influencing the emergence of symptoms such as hallucinations. The decreasing trajectory, in comparison, was associated with hypoactivations in areas influencing attention and basic information processing more generally. These alterations might affect the trajectories’ susceptibilities to positive vs. negative symptoms, respectively.
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Affiliation(s)
- Roxane Assaf
- Centre de Recherche, Institut Universitaire en Santé Mentale de Montréal, 7331 Hochelaga, Montreal, H1N 3V2, Canada.,Department of Psychiatry and Addiction, Faculty of Medicine, University of Montreal, Montreal, Canada
| | - Julien Ouellet
- Department of Psychiatry and Addiction, Faculty of Medicine, University of Montreal, Montreal, Canada.,Centre de Recherche du Centre Hospitalier, Universitaire Sainte-Justine, Montreal, Canada
| | - Josiane Bourque
- Department of Psychiatry, Perelman Faculty of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Emmanuel Stip
- Department of Psychiatry and Addiction, Faculty of Medicine, University of Montreal, Montreal, Canada
| | - Marco Leyton
- Department of Psychiatry, Faculty of Medicine, McGill University, Montreal, Canada
| | - Patricia Conrod
- Department of Psychiatry and Addiction, Faculty of Medicine, University of Montreal, Montreal, Canada.,Centre de Recherche du Centre Hospitalier, Universitaire Sainte-Justine, Montreal, Canada
| | - Stéphane Potvin
- Centre de Recherche, Institut Universitaire en Santé Mentale de Montréal, 7331 Hochelaga, Montreal, H1N 3V2, Canada. .,Department of Psychiatry and Addiction, Faculty of Medicine, University of Montreal, Montreal, Canada.
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12
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Yue W, Huang H, Duan J. Potential diagnostic biomarkers for schizophrenia. MEDICAL REVIEW (BERLIN, GERMANY) 2022; 2:385-416. [PMID: 37724326 PMCID: PMC10388817 DOI: 10.1515/mr-2022-0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 06/20/2022] [Indexed: 09/20/2023]
Abstract
Schizophrenia (SCH) is a complex and severe mental disorder with high prevalence, disability, mortality and carries a heavy disease burden, the lifetime prevalence of SCH is around 0.7%-1.0%, which has a profound impact on the individual and society. In the clinical practice of SCH, key problems such as subjective diagnosis, experiential treatment, and poor overall prognosis are still challenging. In recent years, some exciting discoveries have been made in the research on objective biomarkers of SCH, mainly focusing on genetic susceptibility genes, metabolic indicators, immune indices, brain imaging, electrophysiological characteristics. This review aims to summarize the biomarkers that may be used for the prediction and diagnosis of SCH.
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Affiliation(s)
- Weihua Yue
- Institute of Mental Health, Peking University Sixth Hospital, Beijing, China
- National Clinical Research Center for Mental Disorders & NHC Key Laboratory of Mental Health (Peking University) and Chinese Academy of Medical Sciences Research Unit, Beijing, China
- PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, China
- Chinese Institute for Brain Research, Beijing, China
| | - Hailiang Huang
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Jubao Duan
- Center for Psychiatric Genetics, NorthShore University Health System, Evanston, IL, USA
- Department of Psychiatry and Behavioral Neurosciences, University of Chicago, Chicago, IL, USA
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13
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Mirror neurons 30 years later: implications and applications. Trends Cogn Sci 2022; 26:767-781. [PMID: 35803832 DOI: 10.1016/j.tics.2022.06.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 05/21/2022] [Accepted: 06/07/2022] [Indexed: 12/30/2022]
Abstract
Mirror neurons (MNs) were first described in a seminal paper in 1992 as a class of monkey premotor cells discharging during both action execution and observation. Despite their debated origin and function, recent studies in several species, from birds to humans, revealed that beyond MNs properly so called, a variety of cell types distributed among multiple motor, sensory, and emotional brain areas form a 'mirror mechanism' more complex and flexible than originally thought, which has an evolutionarily conserved role in social interaction. Here, we trace the current limits and envisage the future trends of this discovery, showing that it inspired translational research and the development of new neurorehabilitation approaches, and constitutes a point of no return in social and affective neuroscience.
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14
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Zapetis SL, Nasiriavanaki Z, Luther L, Holt DJ. Neural Correlates of Variation in Personal Space and Social Functioning in Schizophrenia and Healthy Individuals. Schizophr Bull 2022; 48:1075-1084. [PMID: 35661903 PMCID: PMC9434426 DOI: 10.1093/schbul/sbac052] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Changes in the regulation of interpersonal distance, or "personal space" (PS), have been repeatedly observed in schizophrenia and, in some studies, linked to negative symptoms. However, the neurobiological basis of these impairments is poorly understood. METHODS Personal space measurements, functional connectivity of a brain network sensitive to intrusions into PS, and symptoms of social withdrawal and anhedonia were assessed, and associations among these outcomes measured, in 33 individuals with a psychotic disorder (primarily schizophrenia [SCZ]) and 36 control subjects (CON). RESULTS Personal space size was significantly higher (P = .002) and PS permeability (reflecting the capacity to tolerate intrusions into PS) was significantly lower (P = .021) in the SCZ relative to the CON group, and both measures were significantly correlated with social anhedonia and withdrawal in the full sample (all P < .007). Moreover, functional connectivity between the PS and default mode (DM) networks was significantly correlated with the permeability, but not the size, of PS in the full sample and in the SCZ and CON groups separately, and with social withdrawal in the SCZ group. Lastly, the association between PS-DM network connectivity and social withdrawal in the SCZ group was fully mediated by PS permeability. DISCUSSION Neural and behavioral aspects of PS regulation are linked to social motivation in both healthy individuals and those with psychotic disorders, suggesting that measurements of PS could serve as transdiagnostic markers of social functioning.
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Affiliation(s)
- Sarah L Zapetis
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA, USA
| | - Zahra Nasiriavanaki
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA, USA,Harvard Medical School, Boston, MA, USA
| | - Lauren Luther
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA, USA,Harvard Medical School, Boston, MA, USA
| | - Daphne J Holt
- To whom correspondence should be addressed; 149 13th Street, Charlestown, MA 02129, USA; tel: 617-726-7618, fax: 617-726-4076, e-mail:
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15
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Oliver LD, Hawco C, Viviano JD, Voineskos AN. From the Group to the Individual in Schizophrenia Spectrum Disorders: Biomarkers of Social Cognitive Impairments and Therapeutic Translation. Biol Psychiatry 2022; 91:699-708. [PMID: 34799097 DOI: 10.1016/j.biopsych.2021.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 08/11/2021] [Accepted: 09/11/2021] [Indexed: 12/23/2022]
Abstract
People with schizophrenia spectrum disorders (SSDs) often experience persistent social cognitive impairments, associated with poor functional outcome. There are currently no approved treatment options for these debilitating symptoms, highlighting the need for novel therapeutic strategies. Work to date has elucidated differential social processes and underlying neural circuitry affected in SSDs, which may be amenable to modulation using neurostimulation. Further, advances in functional connectivity mapping and electric field modeling may be used to identify individualized treatment targets to maximize the impact of brain stimulation on social cognitive networks. Here, we review literature supporting a roadmap for translating functional connectivity biomarker discovery to individualized treatment development for social cognitive impairments in SSDs. First, we outline the relevance of social cognitive impairments in SSDs. We review machine learning approaches for dimensional brain-behavior biomarker discovery, emphasizing the importance of individual differences. We synthesize research showing that brain stimulation techniques, such as repetitive transcranial magnetic stimulation, can be used to target relevant networks. Further, functional connectivity-based individualized targeting may enhance treatment response. We then outline recent approaches to account for neuroanatomical variability and optimize coil positioning to individually maximize target engagement. Overall, the synthesized literature provides support for the utility and feasibility of this translational approach to precision treatment. The proposed roadmap to translate biomarkers of social cognitive impairments to individualized treatment is currently under evaluation in precision-guided trials. Such a translational approach may also be applicable across conditions and generalizable for the development of individualized neurostimulation targeting other behavioral deficits.
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Affiliation(s)
- Lindsay D Oliver
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Colin Hawco
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - Joseph D Viviano
- Mila-Quebec Artificial Intelligence Institute, Montreal, Quebec, Canada
| | - Aristotle N Voineskos
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.
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16
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Schizophrenia in the flesh: Revisiting schizophrenia as a disorder of the bodily self. Schizophr Res 2022; 242:113-117. [PMID: 34996674 DOI: 10.1016/j.schres.2021.12.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 11/21/2022]
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17
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Brewer R, Murphy J, Bird G. Atypical interoception as a common risk factor for psychopathology: A review. Neurosci Biobehav Rev 2021; 130:470-508. [PMID: 34358578 PMCID: PMC8522807 DOI: 10.1016/j.neubiorev.2021.07.036] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 07/09/2021] [Accepted: 07/31/2021] [Indexed: 02/06/2023]
Abstract
The inadequacy of a categorial approach to mental health diagnosis is now well-recognised, with many authors, diagnostic manuals and funding bodies advocating a dimensional, trans-diagnostic approach to mental health research. Variance in interoception, the ability to perceive one's internal bodily state, is reported across diagnostic boundaries, and is associated with atypical functioning across symptom categories. Drawing on behavioural and neuroscientific evidence, we outline current research on the contribution of interoception to numerous cognitive and affective abilities (in both typical and clinical populations), and describe the interoceptive atypicalities seen in a range of psychiatric conditions. We discuss the role that interoception may play in the development and maintenance of psychopathology, as well as the ways in which interoception may differ across clinical presentations. A number of important areas for further research on the role of interoception in psychopathology are highlighted.
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Affiliation(s)
- Rebecca Brewer
- Department of Psychology, Royal Holloway, University of London, United Kingdom
| | - Jennifer Murphy
- Department of Psychology, Royal Holloway, University of London, United Kingdom.
| | - Geoffrey Bird
- Department of Experimental Psychology, University of Oxford, United Kingdom; Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, United Kingdom
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18
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Lee HS, Hong SJJ, Baxter T, Scott J, Shenoy S, Buck L, Bodenheimer B, Park S. Altered Peripersonal Space and the Bodily Self in Schizophrenia: A Virtual Reality Study. Schizophr Bull 2021; 47:927-937. [PMID: 33844019 PMCID: PMC8266616 DOI: 10.1093/schbul/sbab024] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Self-disturbances such as an anomalous perception of one's own body boundary are central to the phenomenology of schizophrenia (SZ), but measuring the spatial parameters of the hypothesized self-other boundary has proved to be challenging. Peripersonal space (PPS) refers to the immediate zone surrounding the body where the self interacts physically with the environment; the space that corresponds to hypothesized self-other boundary. PPS is represented by enhanced multisensory integration and faster reaction time (RT) for objects near the body. Thus, multisensory RT tasks can be used to estimate self-other boundary. We aimed to quantify PPS in SZ using an immersive virtual reality visuotactile RT paradigm. Twenty-four participants with SZ and 24 demographically matched controls (CO) were asked to detect tactile vibration while watching a ball approaching them, thrown by either a machine (nonsocial condition) or an avatar (social condition). Parameters of PPS were estimated from the midpoint of the spatial range where the tactile RT decreased most rapidly (size) and the gradient of the RT change at this midpoint (slope). Overall, PPS was smaller in participants with SZ compared with CO. PPS slope for participants with SZ was shallower than CO in the social but not in nonsocial condition, indicating an increased uncertainty of self-other boundary across an extended zone in SZ. Social condition also increased false alarms for tactile detection in SZ. Clinical symptoms were not clearly associated with PPS parameters. These findings suggest the context-dependent nature of weakened body boundary in SZ and underscore the importance of reconciliating objective and subjective aspects of self-disturbances.
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Affiliation(s)
- Hyeon-Seung Lee
- Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - Seok-Jin J Hong
- Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - Tatiana Baxter
- Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - Jason Scott
- Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - Sunil Shenoy
- Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - Lauren Buck
- School of Engineering, Vanderbilt University, Nashville, TN, USA
| | | | - Sohee Park
- Department of Psychology, Vanderbilt University, Nashville, TN, USA
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19
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Anomalous self-experiences are related to general cognition deficits in schizophrenia. Eur Arch Psychiatry Clin Neurosci 2021; 271:707-712. [PMID: 33221938 DOI: 10.1007/s00406-020-01213-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 11/07/2020] [Indexed: 12/29/2022]
Abstract
Anomalous self-experiences (ASEs) are prevalent in schizophrenia, but its underpinnings are not completely understood. Given the likely complex substrate of the experience of the self, neurocognitive functions requiring coordinate cerebral activity may relate to ASEs. Moreover, cognitive deficits functioning may be involved in the link between self-experience disturbances and some aspects of social dysfunction in schizophrenia. We have assessed ASEs in 41 schizophrenia patients (11 first episodes) using the Inventory of Psychotic-Like Anomalous Self-Experiences (IPASE), and the general cognition using the Brief Assessment of Cognition in Schizophrenia (BACS). Besides, social cognition was assessed using two complementary tools Meyer, Salovey and Caruso Emotional Intelligence Test (MSCEIT) and GEOPTE (Grupo Español para la Optimización del Tratamiento de la Esquizofrenia). The results revealed that Self-awareness/presence and Somatization IPASE scores were inversely explained by motor speed in the BACS; Consciousness IPASE scores were inversely explained by problem solving performance in the BACS. These data reveal a significant relationship between certain domains of general cognition and anomalous self-experiences, that may be useful in further investigation on the substrates of ASEs.
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20
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Lincoln SH, Germine LT, Mair P, Hooker CI. Simulation and social behavior: an fMRI study of neural processing during simulation in individuals with and without risk for psychosis. Soc Cogn Affect Neurosci 2021; 15:165-174. [PMID: 32248225 PMCID: PMC7304514 DOI: 10.1093/scan/nsaa047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 11/17/2019] [Accepted: 02/28/2020] [Indexed: 12/26/2022] Open
Abstract
Social dysfunction is a risk indicator for schizophrenia spectrum disorders, with at-risk individuals demonstrating a range of social behavior impairments. Variability in social ability may be explained by individual differences in the psychological processes of social behavior. In particular, mental simulation, the process by which an individual generates an internal representation of the thoughts or feelings of another, may explain variation in social behavior. This study investigates the neural process of simulation in healthy individuals and individuals at risk for psychosis. Using a novel fMRI pain paradigm, individuals watch videos of another person’s hand or foot experiencing pain. After each video, individuals are asked to simulate the observed painful situation on their own hand or foot. Neural activity during simulation in the somatosensory cortex was associated with real-world self-reported social behavior, such that a stronger neural response in the somatosensory cortex was associated with greater rates of positive social experiences and affective empathy across all participants. These findings suggest that the neural mechanisms that underlie simulation are important for social behavior, and may explain individual variability in social functioning in healthy and at-risk populations.
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Affiliation(s)
| | - Laura T Germine
- Department of Psychiatry, Harvard Medical School, Boston, MA 02115, USA.,McLean Hospital, Belmont, MA 02478, USA
| | - Patrick Mair
- Department of Psychology, Harvard University, Cambridge, MA 02138, USA
| | - Christine I Hooker
- Department of Psychiatry and Behavioral Sciences, Rush University Medical Center, Chicago, IL 60612, USA
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21
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De Meulemeester C, Lowyck B, Luyten P. The role of impairments in self-other distinction in borderline personality disorder: A narrative review of recent evidence. Neurosci Biobehav Rev 2021; 127:242-254. [PMID: 33901500 DOI: 10.1016/j.neubiorev.2021.04.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 03/30/2021] [Accepted: 04/18/2021] [Indexed: 01/05/2023]
Abstract
Impairments in maintaining a differentiated sense of "self" and "other" are thought to be a central feature of borderline personality disorder (BPD). However, studies directly focusing on self-other distinction (SOD) in BPD are scarce, and these findings have not yet been integrated with novel insights into the neural mechanism involved in SOD. Here, we present a narrative review of recent behavioral and neuroimaging findings focusing on impairments in SOD in BPD. Behavioral findings of SOD at the embodied level provide preliminary evidence for impairments in multisensory integration in BPD. Furthermore, both behavioral and neuroscientific data converge to suggest that SOD impairments in BPD reflect an inability to shift between self and other representations according to task demands. Research also suggests that disruptions in infant-caregiver synchrony may play a role in the development of these impairments. Based on these findings, we present a new, integrative model linking impairments in SOD to reduced neural and behavioral synchrony in BPD. The implications of these findings for future research and clinical interventions are outlined.
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Affiliation(s)
| | - Benedicte Lowyck
- University Psychiatric Hospital UPC KU Leuven, Belgium; Department of Neurosciences, Faculty of Medicine, KU Leuven, Belgium
| | - Patrick Luyten
- Faculty of Psychology and Educational Sciences, KU Leuven, Belgium; Research Department of Clinical, Educational and Health Psychology, University College London, UK
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22
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Hamilton A, Northoff G. Abnormal ERPs and Brain Dynamics Mediate Basic Self Disturbance in Schizophrenia: A Review of EEG and MEG Studies. Front Psychiatry 2021; 12:642469. [PMID: 33912085 PMCID: PMC8072007 DOI: 10.3389/fpsyt.2021.642469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 03/11/2021] [Indexed: 11/05/2022] Open
Abstract
Background: Interest in disordered sense of self in schizophrenia has recently re-emerged in the literature. It has been proposed that there is a basic self disturbance, underlying the diagnostic symptoms of schizophrenia, in which the person's sense of being a bounded individual continuous through time loses stability. This disturbance has been documented phenomenologically and at the level of cognitive tasks. However, the neural correlates of basic self disorder in schizophrenia are poorly understood. Methods: A search of PubMed was used to identify studies on self and schizophrenia that reported EEG or MEG data. Results: Thirty-three studies were identified, 32 using EEG and one using MEG. Their operationalizations of the self were divided into six paradigms: self-monitoring for errors, proprioception, self-other integration, self-referential processing, aberrant salience, and source monitoring. Participants with schizophrenia were less accurate on self-referential processing tasks and had slower response times across most studies. Event-related potential amplitudes differed across many early and late components, with reduced N100 suppression in source monitoring paradigms being the most replicated finding. Several studies found differences in one or more frequency band, but no coherent overall finding emerged in this area. Various other measures of brain dynamics also showed differences in single studies. Only some of the study designs were adequate to establish a causal relationship between the self and EEG or MEG measures. Conclusion: The broad range of changes suggests a global self disturbance at the neuronal level, possibly carried over from the resting state. Further studies that successfully isolate self-related effects are warranted to better understand the temporal-dynamic and spatial-topographic basis of self disorder and its relationship to basic self disturbance on the phenomenological level.
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Affiliation(s)
- Arthur Hamilton
- Department of Cognitive Science, Carleton University, Ottawa, ON, Canada
| | - Georg Northoff
- Mind, Brain Imaging and Neuroethics Unit, Institute of Mental Health Research, University of Ottawa, Ottawa, ON, Canada
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23
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Simonsen A, Fusaroli R, Petersen ML, Vermillet AQ, Bliksted V, Mors O, Roepstorff A, Campbell-Meiklejohn D. Taking others into account: combining directly experienced and indirect information in schizophrenia. Brain 2021; 144:1603-1614. [PMID: 33829262 DOI: 10.1093/brain/awab065] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 12/11/2020] [Accepted: 01/05/2021] [Indexed: 11/14/2022] Open
Abstract
An abnormality in inference, resulting in distorted internal models of the world, has been argued to be a common mechanism underlying the heterogeneous psychopathology in schizophrenia. However, findings have been mixed as to wherein the abnormality lies and have typically failed to find convincing relations to symptoms. The limited and inconsistent findings may have been due to methodological limitations of the experimental design, such as conflating other factors (e.g. comprehension) with the inferential process of interest, and a failure to adequately assess and model the key aspects of the inferential process. Here, we investigated probabilistic inference based on multiple sources of information using a new digital version of the beads task, framed in a social context. Thirty-five patients with schizophrenia or schizoaffective disorder with a wide range of symptoms and 40 matched healthy control subjects performed the task, where they guessed the colour of the next marble drawn from a jar based on a sample from the jar as well as the choices and the expressed confidence of four people, each with their own independent sample (which was hidden from participant view). We relied on theoretically motivated computational models to assess which model best captured the inferential process and investigated whether it could serve as a mechanistic model for both psychotic and negative symptoms. We found that 'circular inference' best described the inference process, where patients over-weighed and overcounted direct experience and under-weighed information from others. Crucially, overcounting of direct experience was uniquely associated with most psychotic and negative symptoms. In addition, patients with worse social cognitive function had more difficulties using others' confidence to inform their choices. This difficulty was related to worse real-world functioning. The findings could not be easily ascribed to differences in working memory, executive function, intelligence or antipsychotic medication. These results suggest hallucinations, delusions and negative symptoms could stem from a common underlying abnormality in inference, where directly experienced information is assigned an unreasonable weight and taken into account multiple times. By this, even unreliable first-hand experiences may gain disproportionate significance. The effect could lead to false perceptions (hallucinations), false beliefs (delusions) and deviant social behaviour (e.g. loss of interest in others, bizarre and inappropriate behaviour). This may be particularly problematic for patients with social cognitive deficits, as they may fail to make use of corrective information from others, ultimately leading to worse social functioning.
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Affiliation(s)
- Arndis Simonsen
- Psychosis Research Unit, Aarhus University Hospital, 8200 Aarhus, Denmark.,The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, 8200 Aarhus, Denmark.,The Interacting Minds Centre, School of Culture and Society, Aarhus University, 8000 Aarhus, Denmark.,Psykiatriski depilin, Landssjúkrahúsið, 100 Tórshavn, Faroe Islands.,Ílegusavnið, 100 Tórshavn, Faroe Islands
| | - Riccardo Fusaroli
- The Interacting Minds Centre, School of Culture and Society, Aarhus University, 8000 Aarhus, Denmark.,Cognitive Science, Aarhus University, 8000 Aarhus, Denmark
| | - Malte Lau Petersen
- The Interacting Minds Centre, School of Culture and Society, Aarhus University, 8000 Aarhus, Denmark
| | - Arnault-Quentin Vermillet
- The Interacting Minds Centre, School of Culture and Society, Aarhus University, 8000 Aarhus, Denmark.,Cognitive Science, Aarhus University, 8000 Aarhus, Denmark
| | - Vibeke Bliksted
- Psychosis Research Unit, Aarhus University Hospital, 8200 Aarhus, Denmark.,The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, 8200 Aarhus, Denmark.,The Interacting Minds Centre, School of Culture and Society, Aarhus University, 8000 Aarhus, Denmark
| | - Ole Mors
- Psychosis Research Unit, Aarhus University Hospital, 8200 Aarhus, Denmark.,The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, 8200 Aarhus, Denmark
| | - Andreas Roepstorff
- The Interacting Minds Centre, School of Culture and Society, Aarhus University, 8000 Aarhus, Denmark
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24
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Michael GA, Guyot D, Tarroux E, Comte M, Salgues S. Feeling Oneself Requires Embodiment: Insights From the Relationship Between Own-Body Transformations, Schizotypal Personality Traits, and Spontaneous Bodily Sensations. Front Psychol 2021; 11:578237. [PMID: 33424690 PMCID: PMC7786119 DOI: 10.3389/fpsyg.2020.578237] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 12/07/2020] [Indexed: 12/25/2022] Open
Abstract
Subtle bodily sensations such as itching or fluttering that occur in the absence of any external trigger (i.e., spontaneous sensations, or SPS) may serve to locate the spatial boundaries of the body. They may constitute the normal counterpart of extreme conditions in which body-related hallucinations and perceptual aberrations are experienced. Previous investigations have suggested that situations in which the body is spontaneously experienced as being deformed are related to the ability to perform own-body transformations, i.e., mental rotations of the body requiring disembodiment. We therefore decided to consider whether the perception of SPS might relate to embodiment as assessed through (i) the ability to perform own-body transformations (OBT task) and (ii) schizotypal traits (Schizotypal Personality Questionnaire, or SPQ), since high degrees of schizotypy in the general population have been associated with more vivid perceptions and aberrant perceptual experiences. Then participants completed a standard SPS task. Our analysis revealed that the slower the response time in the OBT task, the more frequent the perception of SPS. This suggests that difficulties in disembodying and mentally transforming one's own body facilitate feeling oneself. Furthermore, a greater number of correct responses in the OBT task was associated with less frequent perception of SPS. This suggests that finding it easier to disembody and perform mental own-body transformations interferes with the ability to sense oneself. The results also show that higher schizotypal traits, as assessed through the SPQ, are associated with more frequent perception of SPS. Taken together, these results provide a coherent picture and suggest that embodiment is required in order to correctly feel oneself, as expressed through the perception of SPS. The ability to easily experience disembodiment reduces the sense of feeling oneself, and proneness to schizotypal traits produces body misperceptions that enhance and amplify this feeling. The results are discussed in the light of current knowledge and theories about body representations, taking into account attention and interoception as factors that influence body awareness. We offer explanations for perceptual aberrations, body-related delusions, and hallucinations based on misperceived or misinterpreted SPS, and we discuss possible mechanisms that may contribute to feeling and misperceiving oneself.
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Affiliation(s)
- George A Michael
- University of Lyon, Lyon, France.,University Lyon 2, Laboratoire EMC (Cognitive Mechanisms Research Laboratory) (EA 3082), Lyon, France.,University Lyon 2, Institute of Psychology, Lyon, France
| | - Deborah Guyot
- University of Lyon, Lyon, France.,University Lyon 2, Laboratoire EMC (Cognitive Mechanisms Research Laboratory) (EA 3082), Lyon, France.,University Lyon 2, Institute of Psychology, Lyon, France
| | - Emilie Tarroux
- University of Lyon, Lyon, France.,University Lyon 2, Laboratoire EMC (Cognitive Mechanisms Research Laboratory) (EA 3082), Lyon, France.,University Lyon 2, Institute of Psychology, Lyon, France
| | - Mylène Comte
- University of Lyon, Lyon, France.,University Lyon 2, Laboratoire EMC (Cognitive Mechanisms Research Laboratory) (EA 3082), Lyon, France.,University Lyon 2, Institute of Psychology, Lyon, France
| | - Sara Salgues
- University of Lyon, Lyon, France.,University Lyon 2, Laboratoire EMC (Cognitive Mechanisms Research Laboratory) (EA 3082), Lyon, France.,University Lyon 2, Institute of Psychology, Lyon, France
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25
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Pan CC, Zhou AB. Altered Auditory Self-recognition in People with Schizophrenia. THE SPANISH JOURNAL OF PSYCHOLOGY 2020; 23:e52. [PMID: 33213608 DOI: 10.1017/sjp.2020.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Self-recognition is of great significance to our sense of self. To date, disturbances in the processing of visual self-recognition are well studied in people with schizophrenia, whereas relatively few studies have focused on the processing of self in other domains, such as auditory. An investigation of auditory self-recognition contributes to delineate changes related to self and the potential roots of the described psychopathological aspects connoting schizophrenia. By applying unimodal task and multisensory test, this study investigated auditory self-recognition in people with schizophrenia under unimodal and bimodal circumstances. Forty-six adults diagnosed with schizophrenia and thirty-two healthy controls were involved in this study. Results suggested that people with schizophrenia seemed to have significantly lower perceptual sensitivity in detecting self-voice, and also showed stricter judgment criteria in self-voice decision. Furthermore, in the presentation of stimuli that combined the stimulation of others' faces with one's own voice, people with schizophrenia mistakenly attributed the voices of others as their own. In conclusion, altered auditory self-recognition in people with schizophrenia was found.
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Affiliation(s)
| | - Aibao B Zhou
- Northwest Normal University of Anning District (China)
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26
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Confusion within feedback control between cognitive and sensorimotor agency cues in self-other attribution. Atten Percept Psychophys 2020; 82:3957-3972. [PMID: 32935291 DOI: 10.3758/s13414-020-02129-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Self-other sensory attribution is necessary to realize feedback control because the self-attribution of sensations can drive feedback control. Some studies have suggested that self-other attribution is realized by the integration of both sensorimotor cues, including internal prediction and/or sensory feedback, and cognitive cues, such as knowledge or thought. However, in motor control, it remains unclear whether and how cognitive cues affect self-other attribution. In a feedback-control task, this study manipulated the movements (sensorimotor cue) and appearances (cognitive cue) of the cursor provided as visual feedback on participants' sinusoidal movement. Participants were required to make a self-other attribution regarding whether the cursor's movement reflected their actual movement without being confused by the cursor's appearance. Experiments 1 and 2 showed that participants made illusory self-other attributions within feedback control based on cursor appearance only when the information on cursor movement was reduced by causing the cursor to flicker at 8 Hz. However, in Experiment 3, in which the cursor flickering at 4 Hz reduced the information on cursor movement to a level too low for conscious self-other attribution, cursor appearance was not utilized. Our findings suggest that the effects of cognitive cues on self-other attribution are determined by the cue integration strategy selected for the given situation.
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Costantini M, Salone A, Martinotti G, Fiori F, Fotia F, Di Giannantonio M, Ferri F. Body representations and basic symptoms in schizophrenia. Schizophr Res 2020; 222:267-273. [PMID: 32461087 DOI: 10.1016/j.schres.2020.05.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/24/2019] [Accepted: 05/16/2020] [Indexed: 12/25/2022]
Abstract
Patients with schizophrenia report a wide range of anomalous body experiences. According to the basic symptom model of schizophrenia, disturbances of body perception and awareness are among the most powerful predictors of the changes in the subjective experience of the self in schizophrenia. In this study we first investigated the body structural representation (BSR), a specific aspect of body awareness, and its association to basic symptoms in patients with schizophrenia. Using a finger localization task, we found that patients are significantly less accurate than healthy controls when asked to identify pairs of fingers touched by the experimenter, when the hand is hidden from view. Most importantly, patients' performance at the finger localization task was negatively associated to basic symptoms: the worse the individual accuracy, the higher the SPI-A total score. Moreover, the accuracy at the finger localization task was also negatively correlated with the malleability of the sense of body ownership: the less the individual ability to localize fingers, the stronger the rubber hand illusion. These results are in agreement with the idea that self-disorders in schizophrenia reveal a disconnectedness that can be regarded as a problem of disembodiment and traced back to abnormal body experiences.
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Affiliation(s)
- Marcello Costantini
- Department of Psychological, Health and Territorial Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy; Institute for Advanced Biomedical Technologies, ITAB, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Anatolia Salone
- Department of Neuroscience, Imaging and Clinical Sciences, University of Chieti-Pescara, Chieti, Italy
| | - Giovanni Martinotti
- Institute for Advanced Biomedical Technologies, ITAB, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy; Department of Neuroscience, Imaging and Clinical Sciences, University of Chieti-Pescara, Chieti, Italy
| | | | - Francesca Fotia
- Department of Psychology, University of Essex, Colchester CO4 3SQ, UK
| | - Massimo Di Giannantonio
- Institute for Advanced Biomedical Technologies, ITAB, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy; Department of Neuroscience, Imaging and Clinical Sciences, University of Chieti-Pescara, Chieti, Italy
| | - Francesca Ferri
- Institute for Advanced Biomedical Technologies, ITAB, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy; Department of Neuroscience, Imaging and Clinical Sciences, University of Chieti-Pescara, Chieti, Italy.
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Gunji YP, Nakamura K, Minoura M, Adamatzky A. Three types of logical structure resulting from the trilemma of free will, determinism and locality. Biosystems 2020; 195:104151. [DOI: 10.1016/j.biosystems.2020.104151] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 04/15/2020] [Accepted: 04/15/2020] [Indexed: 12/31/2022]
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Damiani S, Fusar-Poli L, Brondino N, Provenzani U, Baldwin H, Fusar-Poli P, Politi P. World/self ambivalence: A shared mechanism in different subsets of psychotic experiences? Linking symptoms with resting-state fMRI. Psychiatry Res Neuroimaging 2020; 299:111068. [PMID: 32208349 DOI: 10.1016/j.pscychresns.2020.111068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 03/12/2020] [Accepted: 03/14/2020] [Indexed: 12/27/2022]
Abstract
The psychosis spectrum comprises heterogeneous disorders characterized by both world-related and self-related symptoms. How these symptoms may arise with similar features in spite of the different aetiologies is yet an unsolved question. In behavior narrative review, we compare three conditions characterized by psychotic experiences (schizophrenia, substance-use disorder and sensory-deprivation) searching for links between their phenomenological features and the mechanisms underlying their onset. Clinically, psychotic experiences are characterized by the reciprocal contamination of world- and self-related contents, termed 'world/self ambivalence'. Neuroimaging evidence suggests that the imbalance between stimuli-, self-, and attention-related functional networks (visual/auditory, default-mode, and salience network respectively) assumes central relevance in all the conditions considered. Phenomenology and neurobiology were thus interrelated in light of the reviewed literature, identifying two key neuronal mechanisms which may lead to world/self ambivalence. First, psychotic experiences are associated with the relative dominance of one network over the other (default-mode over auditory/visual networks, or vice-versa), prompting an excess of internal or external pressure to the experienced ambivalence between world and self. Second, an altered salience network resting-state functional connectivity could generate a dysregulation of the attentive fluctuations from self- to world-related activity, thus blurring the boundary between the environment and oneself, labelled the 'world/self boundary'.
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Affiliation(s)
- Stefano Damiani
- University of Pavia, Department of Brain and Behavioral Sciences. Via Bassi 21, 27100, Pavia, Italy..
| | - Laura Fusar-Poli
- Department of Clinical and Experimental Medicine, Psychiatry Unit, Via Santa Sofia 78, 95123, Catania, Italy
| | - Natascia Brondino
- University of Pavia, Department of Brain and Behavioral Sciences. Via Bassi 21, 27100, Pavia, Italy
| | - Umberto Provenzani
- University of Pavia, Department of Brain and Behavioral Sciences. Via Bassi 21, 27100, Pavia, Italy
| | - Helen Baldwin
- Early Psychosis: Interventions and Clinical-detection (EPIC) Lab, Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; National Institute for Health Research, Maudsley Biomedical Research Center, South London and Maudsley National Health Service (NHS) Foundation Trust, London, United Kingdom
| | - Paolo Fusar-Poli
- University of Pavia, Department of Brain and Behavioral Sciences. Via Bassi 21, 27100, Pavia, Italy.; Early Psychosis: Interventions and Clinical-detection (EPIC) Lab, Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; OASIS service, SLaM NHS Foundation Trust, London, United Kingdom
| | - Pierluigi Politi
- University of Pavia, Department of Brain and Behavioral Sciences. Via Bassi 21, 27100, Pavia, Italy
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Miyawaki Y, Otani T, Morioka S. Agency judgments in post-stroke patients with sensorimotor deficits. PLoS One 2020; 15:e0230603. [PMID: 32187207 PMCID: PMC7080267 DOI: 10.1371/journal.pone.0230603] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 03/03/2020] [Indexed: 11/19/2022] Open
Abstract
Sense of agency refers to the feeling of being in control of one's actions. Previous research has demonstrated that sense of agency is produced through the sensorimotor system, which is involved in comparing internal predictions with sensory feedback in motor control. Therefore, sensorimotor deficits might impair agency through a sensorimotor system malfunction. The present study examined this hypothesis by investigating post-stroke patients who had suffered a subcortical stroke that damaged regions associated with sensorimotor function. To examine agency judgments with respect to motor control, we adopted a self-other attribution task and applied it to post-stroke patients. Participants traced a horizontal straight line and received visual feedback through a cursor on a monitor. The cursor movement reflected either the participants' actual movement or the movement of an "other" that had been previously recorded. Participants judged whether the cursor movement reflected their own movement (self) or an other's movement while they engaged in four cycles of the horizontal tracing movement. After each trial, participants reported their self-other judgment on a nine-point scale. Post-stroke patients completed the experiment with their paretic as well as their non-paralyzed upper limbs. Compared to healthy controls, patients made significantly more self-attributions of others' movements. Interestingly, such misattributions were observed in the patients' performance using both paretic and non-paralyzed upper limbs. These results suggest that post-stroke patients with sensorimotor deficits form misattributions that cannot be explained solely by the sensorimotor system's role in motor control. We discuss these misattributions in post-stroke patients in terms of cue integration theory.
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Affiliation(s)
- Yu Miyawaki
- Graduate School of Health Science, Kio University, Kitakaturagi-gun, Nara, Japan
- Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Takeshi Otani
- Department of Rehabilitation, Ishikawa Hospital, Himeji, Hyogo, Japan
| | - Shu Morioka
- Graduate School of Health Science, Kio University, Kitakaturagi-gun, Nara, Japan
- Neurorehabilitation Research Center, Kio University, Kitakaturagi-gun, Nara, Japan
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Di Plinio S, Arnò S, Perrucci MG, Ebisch SJH. The evolving sense of agency: Context recency and quality modulate the interaction between prospective and retrospective processes. Conscious Cogn 2020; 80:102903. [PMID: 32145388 DOI: 10.1016/j.concog.2020.102903] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 02/18/2020] [Accepted: 02/26/2020] [Indexed: 10/24/2022]
Abstract
Humans acquire a sense of agency through their interactions with the world and their sensory consequences. Previous studies have highlighted stable agency-related phenomena like intentional binding, which depend on both prospective, context-dependent and retrospective, outcome-dependent processes. In the current study, we investigated the interaction between prospective and retrospective processes underlying the adaptation of an ongoing sense of agency. The results showed that prospective intentional binding developed during a temporal window of up to 20 prior events was independent of the nature of the ongoing event. By contrast, the characteristics of the ongoing event retrospectively influenced prospective intentional binding developed during a temporal window narrower than 6 prior events. These findings characterize the interaction between prospective and retrospective mechanisms as a fundamental process to continuously update the sense of agency through sensorimotor learning. High psychosis-like experience traits weakened this interaction, suggesting that reduced adaption to the context contributes to altered self-experience.
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Affiliation(s)
- Simone Di Plinio
- Department of Neuroscience Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti 66100, Italy.
| | - Simone Arnò
- Department of Psychological Sciences, G d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Mauro Gianni Perrucci
- Department of Neuroscience Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti 66100, Italy; Institute for Advanced Biomedical Technologies (ITAB), G d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Sjoerd J H Ebisch
- Department of Neuroscience Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti 66100, Italy; Institute for Advanced Biomedical Technologies (ITAB), G d'Annunzio University of Chieti-Pescara, Chieti, Italy
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Comparelli A, Corigliano V, Montalbani B, Bargagna P, Forcina F, Cocco G, Erbuto D, De Carolis A, Pompili M. Relationship between aberrant salience and positive emotion misrecognition in acute relapse of schizophrenia. Asian J Psychiatr 2020; 49:101975. [PMID: 32114376 DOI: 10.1016/j.ajp.2020.101975] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 02/14/2020] [Accepted: 02/20/2020] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Aberrant salience is the incorrect assignment of salience or significance to innocuous stimuli, and been hypothesized to be a central mechanism in the development of psychosis. In addition to aberrant salience, social-cognitive models of psychosis suggest that the way people process information about the self is important in all stages of psychosis. The aim of the present study is to explore the relationship between aberrant salience and emotion processing in schizophrenia patients with psychotic relapse. METHODS A sample of 42 patients with relapse was recruited. Aberrant salience was measured with the Aberrant Salience Inventory (ASI). Assessment of social cognition was carried out using the Facial Emotion Identification Test (FEIT). Partial correlations were controlled for possible confounding variables. RESULTS The ASI factors "increase in meaning" and "heightened cognition" positively correlated with impaired recognition of positive emotions, and ASI total score inversely correlated to time to response to task. Most of incorrect answers corresponded to misclassification of positive emotions. CONCLUSION Our findings show that there is evidence for a relationship between aberrant salience and emotion processing during a psychotic episode; we propose that aberrant salience and alterations in emotion processing trigger the loss of modulating feedback from the external world to produce a self-referential mental state.
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Affiliation(s)
- Anna Comparelli
- Department of Psychiatry, Sant'Andrea Hospital, Sapienza University of Rome, Italy.
| | | | - Benedetta Montalbani
- Psychiatry Residency Training Program, Faculty of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea Hospital, Via di Grottarossa 1035-1039, 00189 Rome, Italy
| | - Paride Bargagna
- Psychiatry Residency Training Program, Faculty of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea Hospital, Via di Grottarossa 1035-1039, 00189 Rome, Italy
| | - Francesca Forcina
- Psychiatry Residency Training Program, Faculty of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea Hospital, Via di Grottarossa 1035-1039, 00189 Rome, Italy
| | - Gabriele Cocco
- Psychiatry Residency Training Program, Faculty of Medicine and Psychology, Sapienza University of Rome, Sant'Andrea Hospital, Via di Grottarossa 1035-1039, 00189 Rome, Italy
| | - Denise Erbuto
- Department of Psychiatry, Sant'Andrea Hospital, Sapienza University of Rome, Italy
| | - Antonella De Carolis
- Department of Psychiatry, Sant'Andrea Hospital, Sapienza University of Rome, Italy
| | - Maurizio Pompili
- Dept. of Neurosciences, Mental Health and Sensory Organs (NESMOS), Sant'Andrea Hospital, Sapienza University of Rome, Italy
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Rossetti I, Romano D, Florio V, Doria S, Nisticò V, Conca A, Mencacci C, Maravita A. Defective Embodiment of Alien Hand Uncovers Altered Sensorimotor Integration in Schizophrenia. Schizophr Bull 2020; 46:294-302. [PMID: 31150551 PMCID: PMC7406197 DOI: 10.1093/schbul/sbz050] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The observation that people with schizophrenia misattribute the source of their own actions has led to the hypothesis that they suffer from altered sensorimotor processes underlying sense of agency. Furthermore, rubber hand studies suggest an abnormal experience of embodiment in schizophrenia. However, this latter finding is based on a procedure that elicits ownership sensations for a fake hand by visuo-tactile stimulation, leaving the agency subcomponent of embodiment relatively untouched. By using a visuo-motor version of the embodiment illusion able to actively elicit also sense of agency for an alien hand, we tested whether the putative sensorimotor deficits are also involved in altering embodiment sensations in schizophrenia. Subjective (questionnaire) and perceptual (forearm bisection performance) indexes of the embodiment illusion were collected. Differently from controls, both the explicit agency component and the implicit body metrics update were not modulated by the extent of visuo-motor congruency in participants with schizophrenia. We conclude that motor prediction and/or temporal binding window impairments may alter the feeling of embodiment and body representation in schizophrenia.
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Affiliation(s)
- Ileana Rossetti
- Department of Psychology, University of Milano-Bicocca, Piazza dell’Ateneo Nuovo 1, Milan, Italy
| | - Daniele Romano
- Department of Psychology, University of Milano-Bicocca, Piazza dell’Ateneo Nuovo 1, Milan, Italy,Neuromi—Milan Center for Neuroscience, University of Milano-Bicocca, Milan, Italy
| | - Vincenzo Florio
- Department of Psychiatry, Comprensorio Sanitario di Bolzano, Bolzano, Italy
| | - Stefania Doria
- Department of SMD—Neuroscience, ASST Fatebenefratelli-Sacco, Milan, Italy
| | - Veronica Nisticò
- Department of Psychology, University of Milano-Bicocca, Piazza dell’Ateneo Nuovo 1, Milan, Italy
| | - Andreas Conca
- Department of Psychiatry, Comprensorio Sanitario di Bolzano, Bolzano, Italy
| | - Claudio Mencacci
- Department of SMD—Neuroscience, ASST Fatebenefratelli-Sacco, Milan, Italy
| | - Angelo Maravita
- Department of Psychology, University of Milano-Bicocca, Piazza dell’Ateneo Nuovo 1, Milan, Italy,Neuromi—Milan Center for Neuroscience, University of Milano-Bicocca, Milan, Italy,To whom correspondence should be addressed: tel: +39-02-64483768 fax: +39-02-64483788; e-mail:
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Lanillos P, Oliva D, Philippsen A, Yamashita Y, Nagai Y, Cheng G. A review on neural network models of schizophrenia and autism spectrum disorder. Neural Netw 2020; 122:338-363. [DOI: 10.1016/j.neunet.2019.10.014] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 09/18/2019] [Accepted: 10/23/2019] [Indexed: 02/07/2023]
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Yang L, Zhang W, Wang W, Yang Z, Wang H, Deng Z, Li C, Qiu B, Zhang D, Kadosh RC, Li H, Zhang X. Neural and Psychological Predictors of Cognitive Enhancement and Impairment from Neurostimulation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1902863. [PMID: 32099765 PMCID: PMC7029648 DOI: 10.1002/advs.201902863] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Indexed: 05/05/2023]
Abstract
Modulating the temporoparietal junction (TPJ), especially the right counterpart, shows promises in enhancing social cognitive ability. However, it is ambiguous whether the functional lateralization of TPJ determines people's responsiveness to brain stimulation. Here, this issue is investigated with an individual difference approach. Forty-five participants attended three sessions of transcranial direct current stimulation (tDCS) experiments and one neuroimaging session. The results support the symmetric mechanism of left and right TPJ stimulation. First, the left and right TPJ stimulation effect are comparable in the group-level analysis. Second, the individual-level analysis reveals that a less right-lateralized TPJ is associated with a higher level of responsiveness. Participants could be classified into positive responders showing cognitive enhancement and negative responders showing cognitive impairment due to stimulation. The positive responders show weaker connectivity between bilateral TPJ and the medial prefrontal cortex, which mediates the prediction of offline responsiveness by the lateralization and the social-related trait. These findings call for a better characterization and predictive models for whom tDCS should be used for, and highlight the necessity and feasibility of prestimulation screening.
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Affiliation(s)
- Li‐Zhuang Yang
- Anhui Province Key Laboratory of Medical Physics and TechnologyCenter of Medical Physics and TechnologyHefei Institutes of Physical ScienceChinese Academy of SciencesHefeiAnhui230031China
- Cancer HospitalChinese Academy of ScienceHefeiAnhui230031China
- Hefei National Laboratory for Physical Sciences at the Microscale, and School of Life SciencesUniversity of Science and Technology of ChinaHefeiAnhui230027China
| | - Wei Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, and School of Life SciencesUniversity of Science and Technology of ChinaHefeiAnhui230027China
| | - Wenjuan Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, and School of Life SciencesUniversity of Science and Technology of ChinaHefeiAnhui230027China
| | - Zhiyu Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, and School of Life SciencesUniversity of Science and Technology of ChinaHefeiAnhui230027China
| | - Hongzhi Wang
- Anhui Province Key Laboratory of Medical Physics and TechnologyCenter of Medical Physics and TechnologyHefei Institutes of Physical ScienceChinese Academy of SciencesHefeiAnhui230031China
- Cancer HospitalChinese Academy of ScienceHefeiAnhui230031China
| | - Zhi‐De Deng
- Noninvasive Neuromodulation UnitExperimental Therapeutics & Pathophysiology BranchIntramural Research ProgramNational Institute of Mental HealthNational Institutes of HealthBethesdaMD20892‐9663USA
| | - Chuanfu Li
- Laboratory of Digital Medical ImagingMedical Imaging CenterFirst Affiliated HospitalAnhui University of Chinese MedicineHefeiAnhui230031China
| | - Bensheng Qiu
- Center for Biomedical EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230027China
| | - Da‐Ren Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, and School of Life SciencesUniversity of Science and Technology of ChinaHefeiAnhui230027China
| | - Roi Cohen Kadosh
- Department of Experimental PsychologyUniversity of OxfordOxfordOX1 3UDUK
| | - Hai Li
- Anhui Province Key Laboratory of Medical Physics and TechnologyCenter of Medical Physics and TechnologyHefei Institutes of Physical ScienceChinese Academy of SciencesHefeiAnhui230031China
- Cancer HospitalChinese Academy of ScienceHefeiAnhui230031China
| | - Xiaochu Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, and School of Life SciencesUniversity of Science and Technology of ChinaHefeiAnhui230027China
- Center for Biomedical EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230027China
- Academy of Psychology and BehaviorTianjin Normal UniversityTianjin300387China
- Hefei Medical Research Center on Alcohol AddictionAnhui Mental Health CenterHefei230022China
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Fekete K, Török E, Makkos Z, Kelemen O, Csigó K, Kéri S. Mentalization across the psychosis spectrum. Schizophr Res 2020; 215:471-472. [PMID: 31471247 DOI: 10.1016/j.schres.2019.08.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/26/2019] [Accepted: 08/19/2019] [Indexed: 11/24/2022]
Affiliation(s)
- Kata Fekete
- Nyírő Gyula National Institute of Psychiatry and Addictions, Budapest, Hungary
| | - Edina Török
- Department of Cognitive Science, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zoltán Makkos
- Nyírő Gyula National Institute of Psychiatry and Addictions, Budapest, Hungary
| | - Oguz Kelemen
- Department of Behavioral Science, University of Szeged, Szeged, Hungary
| | - Katalin Csigó
- Nyírő Gyula National Institute of Psychiatry and Addictions, Budapest, Hungary
| | - Szabolcs Kéri
- Nyírő Gyula National Institute of Psychiatry and Addictions, Budapest, Hungary; Department of Cognitive Science, Budapest University of Technology and Economics, Budapest, Hungary; Department of Physiology, University of Szeged, Szeged, Hungary.
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Vucurovic K, Caillies S, Kaladjian A. Neural correlates of theory of mind and empathy in schizophrenia: An activation likelihood estimation meta-analysis. J Psychiatr Res 2020; 120:163-174. [PMID: 31689587 DOI: 10.1016/j.jpsychires.2019.10.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 10/03/2019] [Accepted: 10/25/2019] [Indexed: 12/14/2022]
Abstract
Social cognition impairment predicts social functioning in schizophrenia. Several studies have found abnormal brain activation in patients with schizophrenia during social cognition tasks. Nevertheless, no coordinate-based meta-analysis comparing the neural correlates of theory of mind and empathy had been done in this population. Our aim was to explore neural correlates related to theory of mind and empathy in patients with schizophrenia compared to healthy controls, in order to identify abnormal brain activation related to emotional content during mental state attribution in schizophrenia. We performed a neural-coordinate-based Activation Likelihood Estimation (ALE) meta-analysis of existing neuroimaging data in the literature to distinguish between abnormal brain maps associated with emotional attribution and those associated with intention/belief inference. We found that brain activation in patients group was significantly decreased in the right ventrolateral prefrontal cortex (VLPFC) during emotional attribution, while there was a significant decrease in the left posterior temporo-parietal junction (TPJ) during intention/belief attribution. Using a meta-analytic connectivity modeling approach (MACM), we demonstrated that both regions are coactivated with other brain regions known to play a role in social cognition, including the bilateral anterior insula, right TPJ, left amygdala and dorsolateral prefrontal cortex. In addition, abnormal activation in both the left TPJ and right VLPFC was previously reported in association with verbal-auditory hallucinations and a "jumping to conclusions" cognitive bias. Thus, these regions could be valuable targets for therapeutic interventions in schizophrenia.
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Affiliation(s)
- Ksenija Vucurovic
- Laboratoire C2S (Cognition, Santé, Société), University of Reims Champagne Ardenne, EA 6291, France.
| | - Stéphanie Caillies
- Laboratoire C2S (Cognition, Santé, Société), University of Reims Champagne Ardenne, EA 6291, France
| | - Arthur Kaladjian
- Laboratoire C2S (Cognition, Santé, Société), University of Reims Champagne Ardenne, EA 6291, France; Department of Psychiatry, University Hospital, Reims, France
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Fuentes-Claramonte P, Martin-Subero M, Salgado-Pineda P, Santo-Angles A, Argila-Plaza I, Salavert J, Arévalo A, Bosque C, Sarri C, Guerrero-Pedraza A, Capdevila A, Sarró S, McKenna PJ, Pomarol-Clotet E, Salvador R. Brain imaging correlates of self- and other-reflection in schizophrenia. NEUROIMAGE-CLINICAL 2019; 25:102134. [PMID: 31877452 PMCID: PMC6931228 DOI: 10.1016/j.nicl.2019.102134] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 11/29/2019] [Accepted: 12/13/2019] [Indexed: 01/06/2023]
Abstract
Self- and other-reflection in schizophrenia were studied with fMRI. Patients failed to activate the right temporo-parietal junction in other-reflection. They also hyperactivated lateral prefrontal cortex for self and other-reflection. These findings might be linked to altered self/other processing in schizophrenia.
Background An alteration in self/other differentiation has been proposed as a basis for several symptoms in schizophrenia, including delusions of reference and social functioning deficits. Dysfunction of the right temporo-parietal junction (TPJ), a region linked with social cognition, has been proposed as the basis of this alteration. However, imaging studies of self- and other-processing in schizophrenia have shown, so far, inconsistent results. Methods Patients with schizophrenia and healthy controls underwent fMRI scanning while performing a task with three conditions: self-reflection, other-reflection and semantic processing. Results Both groups activated similar brain regions for self- and other-reflection compared to semantic processing, including the medial prefrontal cortex, the precuneus and the TPJ. Compared to healthy subjects, patients hyperactivated the left lateral frontal cortex during self- and other-reflection. In other-reflection, compared to self-reflection, patients failed to increase right TPJ activity. Conclusions Altered activity in the right TPJ supports a disturbance in self/other differentiation in schizophrenia, which could be linked with psychotic symptoms and affect social functioning in patients. Hyperactivity of the lateral frontal cortex for self- and other-reflection suggests the presence of greater cognitive demand to perform the task in the patient group.
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Affiliation(s)
- Paola Fuentes-Claramonte
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain; CIBERSAM (Centro de Investigación Biomédica en Red de Salud Mental), Spain
| | - Marta Martin-Subero
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain; CIBERSAM (Centro de Investigación Biomédica en Red de Salud Mental), Spain; Department of Psychiatry and Forensic Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Pilar Salgado-Pineda
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain; CIBERSAM (Centro de Investigación Biomédica en Red de Salud Mental), Spain
| | - Aniol Santo-Angles
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain; CIBERSAM (Centro de Investigación Biomédica en Red de Salud Mental), Spain
| | - Isabel Argila-Plaza
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain
| | - Josep Salavert
- Department of Psychiatry and Forensic Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain; Psychiatry Department, Hospital Sant Rafael, Barcelona, Spain
| | - Antoni Arévalo
- Psychiatry Department, Hospital Sagrat Cor Martorell Barcelona, Spain
| | - Clara Bosque
- Benito Menni Centre Assistencial en Salut Mental, Sant Boi de Llobregat, Barcelona, Spain
| | - Carmen Sarri
- Benito Menni Centre Assistencial en Salut Mental, Sant Boi de Llobregat, Barcelona, Spain
| | | | - Antoni Capdevila
- Radiology Unit, Hospital de la Santa Creu i Sant Pau (HSCSP), Barcelona, Spain; CIBER-BBN (Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina), Spain
| | - Salvador Sarró
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain; CIBERSAM (Centro de Investigación Biomédica en Red de Salud Mental), Spain
| | - Peter J McKenna
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain; CIBERSAM (Centro de Investigación Biomédica en Red de Salud Mental), Spain
| | - Edith Pomarol-Clotet
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain; CIBERSAM (Centro de Investigación Biomédica en Red de Salud Mental), Spain.
| | - Raymond Salvador
- FIDMAG Germanes Hospitalàries Research Foundation, Carrer Dr. Antoni Pujadas, 38, 08830 Sant Boi de Llobregat, Barcelona Spain; CIBERSAM (Centro de Investigación Biomédica en Red de Salud Mental), Spain
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Thakkar KN, Rolfs M. Disrupted Corollary Discharge in Schizophrenia: Evidence From the Oculomotor System. BIOLOGICAL PSYCHIATRY. COGNITIVE NEUROSCIENCE AND NEUROIMAGING 2019; 4:773-781. [PMID: 31105039 PMCID: PMC6733648 DOI: 10.1016/j.bpsc.2019.03.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 03/04/2019] [Accepted: 03/22/2019] [Indexed: 01/18/2023]
Abstract
Corollary discharge (CD) signals are motor-related signals that exert an influence on sensory processing. They allow mobile organisms to predict the sensory consequences of their imminent actions. Among the many functions of CD is to provide a means by which we can distinguish sensory experiences caused by our own actions from those with external causes. In this way, they contribute to a subjective sense of agency. A disruption in the sense of agency is central to many of the clinical symptoms of schizophrenia, and abnormalities in CD signaling have been theorized to underpin particularly those agency-related psychotic symptoms of the illness. Characterizing abnormal CD associated with eye movements in schizophrenia and their resulting influence on visual processing and subsequent action plans may have advantages over other sensory and motor systems. That is because the most robust psychophysiological and neurophysiological data regarding the dynamics and influence of CD as well as the neural circuitry implicated in CD generation and transmission comes from the study of eye movements in humans and nonhuman primates. We review studies of oculomotor CD signaling in the schizophrenia spectrum and possible neurobiological correlates of CD disturbances. We conclude by speculating on the ways in which oculomotor CD dysfunction, specifically, may invoke specific experiences, clinical symptoms, and cognitive impairments. These speculations lay the groundwork for empirical study, and we conclude by outlining potentially fruitful research directions.
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Affiliation(s)
- Katharine N Thakkar
- Department of Psychology, Michigan State University, East Lansing, Michigan; Division of Psychiatry and Behavioral Medicine, Michigan State University, East Lansing, Michigan.
| | - Martin Rolfs
- Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany; Bernstein Center for Computational Neuroscience, Berlin, Germany
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Pyasik M, Capozzi F, Sigaudo M, Cardillo S, Pia L, Rocca P, Garbarini F. I do not know whether you did that: Abnormal implicit attribution of social causality in patients with schizophrenia. Schizophr Res 2019; 210:291-293. [PMID: 30600113 DOI: 10.1016/j.schres.2018.12.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/19/2018] [Accepted: 12/19/2018] [Indexed: 10/27/2022]
Affiliation(s)
- Maria Pyasik
- SAMBA - SpAtial, Motor and Bodily Awareness Research Group, Department of Psychology, University of Turin, Via Po 14, 10123 Turin, Italy
| | - Francesca Capozzi
- Department of Psychology, McGill University, 2001 Avenue McGill College, Montréal, QC H3A 1G1, Canada
| | - Monica Sigaudo
- Department of Neurosciences "Rita Levi Montalcini", Psychiatry, University of Turin, Via Cherasco 15, 1012 Turin, Italy
| | - Simona Cardillo
- Department of Neurosciences "Rita Levi Montalcini", Psychiatry, University of Turin, Via Cherasco 15, 1012 Turin, Italy
| | - Lorenzo Pia
- SAMBA - SpAtial, Motor and Bodily Awareness Research Group, Department of Psychology, University of Turin, Via Po 14, 10123 Turin, Italy; Neuroscience Institute of Turin (NIT), University of Turin, Via Verdi, 8, 10124 Turin, Italy
| | - Paola Rocca
- Department of Neurosciences "Rita Levi Montalcini", Psychiatry, University of Turin, Via Cherasco 15, 1012 Turin, Italy; Neuroscience Institute of Turin (NIT), University of Turin, Via Verdi, 8, 10124 Turin, Italy
| | - Francesca Garbarini
- MANIBUS - Movement ANd body In Behavioral and physiological neUroScience Research Group, Department of Psychology, University of Turin, Via Po 14, 10123 Turin, Italy.
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Di Plinio S, Arnò S, Perrucci MG, Ebisch SJH. Environmental control and psychosis-relevant traits modulate the prospective sense of agency in non-clinical individuals. Conscious Cogn 2019; 73:102776. [PMID: 31272013 DOI: 10.1016/j.concog.2019.102776] [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: 03/13/2019] [Revised: 06/18/2019] [Accepted: 06/22/2019] [Indexed: 10/26/2022]
Abstract
The sense of agency concerns the experience of being the source of one's own actions and their consequences. An altered sense of agency can occur due to task automation and in psychosis. We tested in a non-clinical sample the hypothesis that reducing voluntary task control diminishes intentional binding as an implicit indicator of the sense of agency, possibly interacting with psychosis-relevant personality traits. Agent-device interactions were manipulated obtaining positive-control (voluntary interaction), no-control (automation), and negative-control (device-commanded interaction) groups. The main results showed reduced prospective intentional binding (predictive coding of action consequences) in the no-control and negative-control groups, compared to the positive-control group. Psychosis-like experiences covaried positively with intentional binding in the no-control group, but negatively in the negative-control group. Moreover, positive-social traits were associated with increased intentional binding in the positive-control group. These findings demonstrate the interplay between environmental and individual differences variables in establishing the implicit sense of agency.
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Affiliation(s)
- Simone Di Plinio
- Department of Neuroscience Imaging and Clinical Sciences, "G. D'Annunzio" University of Chieti-Pescara, Chieti 66100, Italy.
| | - Simone Arnò
- Department of Psychological Sciences, "G. D'Annunzio" University of Chieti-Pescara, Chieti 66100, Italy
| | - Mauro Gianni Perrucci
- Department of Neuroscience Imaging and Clinical Sciences, "G. D'Annunzio" University of Chieti-Pescara, Chieti 66100, Italy; Institute for Advanced Biomedical Technologies (ITAB), G D'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Sjoerd J H Ebisch
- Department of Neuroscience Imaging and Clinical Sciences, "G. D'Annunzio" University of Chieti-Pescara, Chieti 66100, Italy; Institute for Advanced Biomedical Technologies (ITAB), G D'Annunzio University of Chieti-Pescara, Chieti, Italy
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Poletti M, Tortorella A, Raballo A. Impaired Corollary Discharge in Psychosis and At-Risk States: Integrating Neurodevelopmental, Phenomenological, and Clinical Perspectives. BIOLOGICAL PSYCHIATRY: COGNITIVE NEUROSCIENCE AND NEUROIMAGING 2019; 4:832-841. [PMID: 31262709 DOI: 10.1016/j.bpsc.2019.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 05/01/2019] [Accepted: 05/01/2019] [Indexed: 12/28/2022]
Abstract
The brain is increasingly viewed in contemporary neuroscience as a predictive machine; its products, such as movements and decisions, are indeed accompanied by predictions of outcomes at distinct levels of awareness. In this conceptual review, we focus on corollary discharge, a basic neurophysiological mechanism that is allegedly involved in sensory prediction and contributes to the distinction between self-generated and externally generated actions. Failures in corollary discharge have been hypothesized as potentially relevant for the progressive development of positive psychotic symptoms such as passivity delusions and auditory verbal hallucinations. We articulate this framework adopting three confocal lenses, namely, the neurodevelopmental, phenomenological, and clinical perspectives. Converging evidence from these research domains indicates a possible developmental cascade leading to increased lifetime risk of psychosis. That is, early childhood alterations of corollary discharge mechanisms, endophenotypically expressed in motor impairment, may concur with a progressive fading of the feeling of self-agency on one's own experiences. Combined with other age-dependent situational challenges occurring along development, this may progressively hamper the ontogenesis of the embodied self, thereby facilitating the emergence of anomalous subjective experiences such as self-disorders (a longitudinal index of schizophrenia spectrum vulnerability) and broadly conceived clinical high-risk states. Overall, this condition increases the risk of developing passivity symptoms, phenotypically expressed in a severity gradient ranging from intrusive thoughts to passivity delusions and auditory verbal hallucinations. Empirical and clinical implications of this framework, as well as future scenarios, are discussed.
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Affiliation(s)
- Michele Poletti
- Department of Mental Health, Azienda Unità Sanitaria Locale-IRCSS di Reggio Emilia, Reggio Emilia, Italy
| | - Alfonso Tortorella
- Department of Medicine, Division of Psychiatry, Clinical Psychology and Rehabilitation, University of Perugia, Perugia, Italy
| | - Andrea Raballo
- Department of Medicine, Division of Psychiatry, Clinical Psychology and Rehabilitation, University of Perugia, Perugia, Italy; Center for Translational, Phenomenological and Developmental Psychopathology, Perugia University Hospital, Perugia, Italy.
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Prikken M, van der Weiden A, Baalbergen H, Hillegers MH, Kahn RS, Aarts H, van Haren NE. Multisensory integration underlying body-ownership experiences in schizophrenia and offspring of patients: a study using the rubber hand illusion paradigm. J Psychiatry Neurosci 2019; 44:177-184. [PMID: 30525317 PMCID: PMC6488483 DOI: 10.1503/jpn.180049] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Schizophrenia is a disorder of basic self-disturbance. Evidence suggests that people with schizophrenia may have aberrant experiences of body ownership: they may feel that they are not the subject of their own body experiences. However, little is known about the development of such disturbances. METHODS Using a rubber hand illusion paradigm, we assessed body ownership in patients with schizophrenia (n = 54), healthy controls (n = 56), children/adolescents at increased familial risk of developing schizophrenia (n = 24) or mood disorders (n = 33), and children/adolescents without this risk (n = 18). In this paradigm, a rubber hand (visible) and a participant’s real hand (invisible) were stroked synchronously and asynchronously; we then measured subjective illusory experiences and proprioceptive drift. RESULTS All groups showed the expected effect of the rubber hand illusion: stronger proprioceptive drift and increased subjective illusory experiences after synchronous versus asynchronous stroking. The effect of synchronicity on subjective experiences was significantly weaker in patients with schizophrenia than in healthy controls, and subjective ratings were positively correlated with delusions in patients. We found no significant differences between children/adolescents with and without increased familial risk. LIMITATIONS Large individual differences raised questions for future research. CONCLUSION We found subtle disturbances in body-ownership experiences in patients with schizophrenia, which were associated with delusions. We found no evidence for impairments in children/adolescents at increased familial risk of developing schizophrenia or a mood disorder. Longitudinal data might reveal whether impairments in body ownership are predictive of psychosis onset.
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Affiliation(s)
- Merel Prikken
- From the Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands (Prikken, Baalbergen, Hillegers, Kahn, Van Haren); the Utrecht University, Department of Psychology, Utrecht, the Netherlands (Van der Weiden, Aarts); the Department of Child and Adolescent Psychiatry/Psychology, Sophia Children’s Hospital, Erasmus Medical Centre, Rotterdam, the Netherlands (Hillegers); and the Icahn School of Medicine at Mount Sinai, Department of Psychiatry, New York, NY (Kahn)
| | - Anouk van der Weiden
- From the Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands (Prikken, Baalbergen, Hillegers, Kahn, Van Haren); the Utrecht University, Department of Psychology, Utrecht, the Netherlands (Van der Weiden, Aarts); the Department of Child and Adolescent Psychiatry/Psychology, Sophia Children’s Hospital, Erasmus Medical Centre, Rotterdam, the Netherlands (Hillegers); and the Icahn School of Medicine at Mount Sinai, Department of Psychiatry, New York, NY (Kahn)
| | - Heleen Baalbergen
- From the Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands (Prikken, Baalbergen, Hillegers, Kahn, Van Haren); the Utrecht University, Department of Psychology, Utrecht, the Netherlands (Van der Weiden, Aarts); the Department of Child and Adolescent Psychiatry/Psychology, Sophia Children’s Hospital, Erasmus Medical Centre, Rotterdam, the Netherlands (Hillegers); and the Icahn School of Medicine at Mount Sinai, Department of Psychiatry, New York, NY (Kahn)
| | - Manon H.J. Hillegers
- From the Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands (Prikken, Baalbergen, Hillegers, Kahn, Van Haren); the Utrecht University, Department of Psychology, Utrecht, the Netherlands (Van der Weiden, Aarts); the Department of Child and Adolescent Psychiatry/Psychology, Sophia Children’s Hospital, Erasmus Medical Centre, Rotterdam, the Netherlands (Hillegers); and the Icahn School of Medicine at Mount Sinai, Department of Psychiatry, New York, NY (Kahn)
| | - René S. Kahn
- From the Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands (Prikken, Baalbergen, Hillegers, Kahn, Van Haren); the Utrecht University, Department of Psychology, Utrecht, the Netherlands (Van der Weiden, Aarts); the Department of Child and Adolescent Psychiatry/Psychology, Sophia Children’s Hospital, Erasmus Medical Centre, Rotterdam, the Netherlands (Hillegers); and the Icahn School of Medicine at Mount Sinai, Department of Psychiatry, New York, NY (Kahn)
| | - Henk Aarts
- From the Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands (Prikken, Baalbergen, Hillegers, Kahn, Van Haren); the Utrecht University, Department of Psychology, Utrecht, the Netherlands (Van der Weiden, Aarts); the Department of Child and Adolescent Psychiatry/Psychology, Sophia Children’s Hospital, Erasmus Medical Centre, Rotterdam, the Netherlands (Hillegers); and the Icahn School of Medicine at Mount Sinai, Department of Psychiatry, New York, NY (Kahn)
| | - Neeltje E.M. van Haren
- From the Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands (Prikken, Baalbergen, Hillegers, Kahn, Van Haren); the Utrecht University, Department of Psychology, Utrecht, the Netherlands (Van der Weiden, Aarts); the Department of Child and Adolescent Psychiatry/Psychology, Sophia Children’s Hospital, Erasmus Medical Centre, Rotterdam, the Netherlands (Hillegers); and the Icahn School of Medicine at Mount Sinai, Department of Psychiatry, New York, NY (Kahn)
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Burke AS, Shapero BG, Pelletier-Baldelli A, Deng WY, Nyer MB, Leathem L, Namey L, Landa C, Cather C, Holt DJ. Rationale, Methods, Feasibility, and Preliminary Outcomes of a Transdiagnostic Prevention Program for At-Risk College Students. Front Psychiatry 2019; 10:1030. [PMID: 32158406 PMCID: PMC7051934 DOI: 10.3389/fpsyt.2019.01030] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 12/30/2019] [Indexed: 12/18/2022] Open
Abstract
PURPOSE Early adulthood represents one period of increased risk for the emergence of a serious mental illness. The college campus provides a unique opportunity to assess and monitor individuals in this at-risk age group. However, there are no validated early detection programs that are widely implemented on college campuses. In an effort to address this gap, we designed and tested an early detection and prevention program tailored to college students. A transdiagnostic approach was employed because of evidence for shared risk factors across major mental illnesses. DESIGN Single arm, prospective study evaluating outcomes following a 4-week intervention. METHOD Three in-person mental health screenings were conducted on the campus of one university. Undergraduate students with at least mildly elevated, self-reported levels of depressive or subclinical psychotic symptoms, who were not receiving treatment for these symptoms, were invited to participate in a 4-session workshop focused on increasing self- and other- awareness and emotion regulation using established mindfulness, self-compassion, and mentalization principles and experiential exercises. Symptoms, resilience-promoting capacities, and aspects of social functioning were assessed pre- and post- intervention. RESULTS 416 students were screened and a total of 63 students participated in the workshop. 91% attended at least 3 of the 4 sessions. The majority of participants found the workshop interesting and useful and would recommend it to a friend. Significant pre-to-post reductions in symptoms (depression, anxiety, and subclinical psychotic symptoms, ps < 0.004) and improvements in resilience-promoting capacities (self-compassion and self-efficacy, ps < 0.006) and indices of social functioning (social motivation, activity, and a measure of comfort with the physical presence of others, ps < 0.04) were observed. Moreover, the significant increases in resilience-promoting capacities correlated with the reductions in affective symptoms (ps < 0.03). CONCLUSIONS These findings suggest that an on-campus mental health screening and early intervention program is feasible, acceptable, and may be associated with improvements in resilience-related capacities and symptom reductions in young adults with non-impairing, subclinical symptoms of psychopathology. Follow-up work will determine whether this program can improve both shorter and longer-term mental health and functional outcomes in this at-risk population.
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Affiliation(s)
- Anne S Burke
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States.,Harvard Medical School, Boston, MA, United States
| | - Benjamin G Shapero
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States.,Harvard Medical School, Boston, MA, United States
| | | | - Wisteria Y Deng
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States
| | - Maren B Nyer
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States.,Harvard Medical School, Boston, MA, United States
| | - Logan Leathem
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Leah Namey
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States
| | - Carrie Landa
- Behavioral Medicine, Boston University, Boston, MA, United States
| | - Corinne Cather
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States.,Harvard Medical School, Boston, MA, United States
| | - Daphne J Holt
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States.,Harvard Medical School, Boston, MA, United States
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Poletti M, Raballo A. Uncanny Mirroring: A Developmental Perspective on the Neurocognitive Origins of Self-Disorders in Schizophrenia. Psychopathology 2019; 52:316-325. [PMID: 31822008 DOI: 10.1159/000504676] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 11/09/2019] [Indexed: 11/19/2022]
Abstract
Varieties of anomalous subjective experiences, i.e. "basic self-disorders" (SDs), have been empirically demonstrated as core clinical features of schizophrenia spectrum disorders, predating full-blown psychotic symptoms. However, the clinical stage in which SDs emerge and their putative neurocognitive origins remain unsolved issues. Focusing on a prototypical anomalous mirror experience (i.e., a stable, trait-like subjective feeling of nonexisting while looking at oneself in the mirror) reported by an 11-year-old boy at familial high risk for schizophrenia and diagnosed as attenuated psychosis syndrome, we outline some possible developmental pathways leading to SDs. Such pathways are hypothesized in accordance with the documented early impairments in perceptual integration across distinct modalities in children at risk for schizophrenia spectrum disorders and to the specific features of mirror experience as provided by phenomenological and developmental psychology perspectives. We conclude that SDs could presumably have an early developmental origin, although children become progressively more aware of them. Although further hypothesis testing in clinical samples and longitudinal empirical investigation of at-risk children is badly needed, we propose that age-appropriate, phenomenologically oriented assessment of SDs could be useful for the early identification of psychotic risk.
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Affiliation(s)
- Michele Poletti
- Child and Adolescent Psychiatry Unit, Department of Mental Health and Pathological Addiction, Azienda Unità Sanitaria Locale-IRCSS di Reggio Emilia, Reggio Emilia, Italy,
| | - Andrea Raballo
- Division of Psychiatry, Clinical Psychology and Rehabilitation, Department of Medicine, University of Perugia, Perugia, Italy.,Center for Translational, Phenomenological and Developmental Psychopathology, Perugia University Hospital, Perugia, Italy
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Kahl S, Kopp S. A Predictive Processing Model of Perception and Action for Self-Other Distinction. Front Psychol 2018; 9:2421. [PMID: 30559703 PMCID: PMC6287016 DOI: 10.3389/fpsyg.2018.02421] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 11/19/2018] [Indexed: 11/13/2022] Open
Abstract
During interaction with others, we perceive and produce social actions in close temporal distance or even simultaneously. It has been argued that the motor system is involved in perception and action, playing a fundamental role in the handling of actions produced by oneself and by others. But how does it distinguish in this processing between self and other, thus contributing to self-other distinction? In this paper we propose a hierarchical model of sensorimotor coordination based on principles of perception-action coupling and predictive processing in which self-other distinction arises during action and perception. For this we draw on mechanisms assumed for the integration of cues for a sense of agency, i.e., the sense that an action is self-generated. We report results from simulations of different scenarios, showing that the model is not only able to minimize free energy during perception and action, but also showing that the model can correctly attribute sense of agency to own actions.
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Affiliation(s)
- Sebastian Kahl
- Social Cognitive Systems Group, CITEC, Bielefeld University, Bielefeld, Germany
| | - Stefan Kopp
- Social Cognitive Systems Group, CITEC, Bielefeld University, Bielefeld, Germany
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Martin AK, Dzafic I, Ramdave S, Meinzer M. Causal evidence for task-specific involvement of the dorsomedial prefrontal cortex in human social cognition. Soc Cogn Affect Neurosci 2018; 12:1209-1218. [PMID: 28444345 PMCID: PMC5597860 DOI: 10.1093/scan/nsx063] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 04/17/2017] [Indexed: 01/17/2023] Open
Abstract
The dorsomedial prefrontal cortex (dmPFC) is a key hub of the 'social brain', but little is known about specific processes supported by this region. Using focal high-definition transcranial direct current stimulation (HD-tDCS) and a social cognitive battery with differing demands on self-other processing, we demonstrate specific involvement of the dmPFC in tasks placing high demands on self-other processing. Specifically, excitatory (anodal) HD-tDCS enhanced the integration of external information into the self for explicit higher-order socio-cognitive tasks across cognitive domains; i.e. visual perspective taking (VPT) and episodic memory. These effects were task specific, as no stimulation effects were found for attributing mental states from the eyes or implicit VPT. Inhibitory (cathodal) HD-tDCS had weaker effects in the opposite direction towards reduced integration of external information into the self. We thus demonstrate for the first time a specific and causal role of the dmPFC in integrating higher-order information from others/external source into that of the self across cognitive domains.
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Affiliation(s)
- Andrew K Martin
- Centre for Clinical Research, University of Queensland, Brisbane, QLD 4029, Australia
| | - Ilvana Dzafic
- Queensland Brain Institute, University of Queensland, Brisbane, QLD 4067, Australia
| | - Swathi Ramdave
- Centre for Clinical Research, University of Queensland, Brisbane, QLD 4029, Australia
| | - Marcus Meinzer
- Centre for Clinical Research, University of Queensland, Brisbane, QLD 4029, Australia
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Ereira S, Dolan RJ, Kurth-Nelson Z. Agent-specific learning signals for self-other distinction during mentalising. PLoS Biol 2018; 16:e2004752. [PMID: 29689053 PMCID: PMC5915684 DOI: 10.1371/journal.pbio.2004752] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 03/19/2018] [Indexed: 11/18/2022] Open
Abstract
Humans have a remarkable ability to simulate the minds of others. How the brain distinguishes between mental states attributed to self and mental states attributed to someone else is unknown. Here, we investigated how fundamental neural learning signals are selectively attributed to different agents. Specifically, we asked whether learning signals are encoded in agent-specific neural patterns or whether a self–other distinction depends on encoding agent identity separately from this learning signal. To examine this, we tasked subjects to learn continuously 2 models of the same environment, such that one was selectively attributed to self and the other was selectively attributed to another agent. Combining computational modelling with magnetoencephalography (MEG) enabled us to track neural representations of prediction errors (PEs) and beliefs attributed to self, and of simulated PEs and beliefs attributed to another agent. We found that the representational pattern of a PE reliably predicts the identity of the agent to whom the signal is attributed, consistent with a neural self–other distinction implemented via agent-specific learning signals. Strikingly, subjects exhibiting a weaker neural self–other distinction also had a reduced behavioural capacity for self–other distinction and displayed more marked subclinical psychopathological traits. The neural self–other distinction was also modulated by social context, evidenced in a significantly reduced decoding of agent identity in a nonsocial control task. Thus, we show that self–other distinction is realised through an encoding of agent identity intrinsic to fundamental learning signals. The observation that the fidelity of this encoding predicts psychopathological traits is of interest as a potential neurocomputational psychiatric biomarker. In order for people to have meaningful social interactions, they need to infer each other’s beliefs. Converging evidence from humans and nonhuman primates suggests that a person’s brain can represent a second person’s beliefs by simulating that second person’s brain activity. However, it is not known how the outputs of those simulations are identified as ‘yours and not mine’. This ability to distinguish self from other is required for social cognition, and it may be impaired in mental health disorders with social cognitive deficits. We investigated self–other distinction in healthy adults learning about an environment both from their own point of view and the point of view of another person. We used computationally identified learning variables and then detected how these variables are represented by measuring magnetic fields in the brain. We found that the human brain can distinguish self from other by expressing these signals in dissociable activity patterns. Subjects who showed the largest difference between self signals and other signals were better at distinguishing self from other in the task and also showed fewer traits of mental health disorders.
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Affiliation(s)
- Sam Ereira
- Max Planck UCL Centre for Computational Psychiatry and Ageing Research, UCL, London, United Kingdom
- Wellcome Centre for Human Neuroimaging, UCL, London, United Kingdom
- * E-mail:
| | - Raymond J. Dolan
- Max Planck UCL Centre for Computational Psychiatry and Ageing Research, UCL, London, United Kingdom
- Wellcome Centre for Human Neuroimaging, UCL, London, United Kingdom
| | - Zeb Kurth-Nelson
- Max Planck UCL Centre for Computational Psychiatry and Ageing Research, UCL, London, United Kingdom
- Google DeepMind, London, United Kingdom
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Ebisch SJH, Gallese V, Salone A, Martinotti G, di Iorio G, Mantini D, Perrucci MG, Romani GL, Di Giannantonio M, Northoff G. Disrupted relationship between "resting state" connectivity and task-evoked activity during social perception in schizophrenia. Schizophr Res 2018; 193:370-376. [PMID: 28735643 DOI: 10.1016/j.schres.2017.07.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 07/05/2017] [Accepted: 07/07/2017] [Indexed: 01/23/2023]
Abstract
Schizophrenia has been described as a self-disorder, whereas social deficits are key features of the illness. Changes in "resting state" activity of brain networks involved in self-related processing have been consistently reported in schizophrenia, but their meaning for social perception deficits remains poorly understood. Here, we applied a novel approach investigating the relationship between task-evoked neural activity during social perception and functional organization of self-related brain networks during a "resting state". "Resting state" functional MRI was combined with task-related functional MRI using a social perception experiment. Twenty-one healthy control participants (HC) and 21 out-patients with a diagnosis of schizophrenia (SCH) were included. There were no significant differences concerning age, IQ, education and gender between the groups. Results showed reduced "resting state" functional connectivity between ventromedial prefrontal cortex and dorsal posterior cingulate cortex in SCH, compared to HC. During social perception, neural activity in dorsal posterior cingulate cortex and behavioral data indicated impaired congruence coding of social stimuli in SCH. Task-evoked activity during social perception in dorsal posterior cingulate cortex co-varied with dorsal posterior cingulate cortex-ventromedial prefrontal cortex functional connectivity during a "resting state" in HC, but not in SCH. Task-evoked activity also correlated with negative symptoms in SCH. These preliminary findings, showing disrupted prediction of social perception measures by "resting state" functioning of self-related brain networks in schizophrenia, provide important insight in the hypothesized link between self and social deficits. They also shed light on the meaning of "resting state" changes for tasks such as social perception.
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Affiliation(s)
- Sjoerd J H Ebisch
- Department of Neuroscience, Imaging and Clinical Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; Institute of Advanced Biomedical Technologies (ITAB), G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy.
| | - Vittorio Gallese
- Department of Medicine and Surgery, Section of Neuroscience, University of Parma, Via Volturno 39E, 43125 Parma, Italy; Institute of Philosophy, School of Advanced Study, University of London, London, UK
| | - Anatolia Salone
- Department of Neuroscience, Imaging and Clinical Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy
| | - Giovanni Martinotti
- Department of Neuroscience, Imaging and Clinical Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; University of Hertfordshire, Department of Pharmacy, Pharmacology, Clinical Sciences, Herts, UK
| | - Giuseppe di Iorio
- Department of Neuroscience, Imaging and Clinical Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy
| | - Dante Mantini
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland; Department of Experimental Psychology, University of Oxford, Oxford, UK; Research Center for Motor Control and Neuroplasticity, KU Leuven, Tervuursevest 101, 3001 Leuven, Belgium
| | - Mauro Gianni Perrucci
- Department of Neuroscience, Imaging and Clinical Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; Institute of Advanced Biomedical Technologies (ITAB), G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy
| | - Gian Luca Romani
- Department of Neuroscience, Imaging and Clinical Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; Institute of Advanced Biomedical Technologies (ITAB), G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy
| | - Massimo Di Giannantonio
- Department of Neuroscience, Imaging and Clinical Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy
| | - Georg Northoff
- The Royal's Institute of Mental Health Research & University of Ottawa Brain and Mind Research Institute, Centre for Neural Dynamics, Faculty of Medicine, University of Ottawa, 145 Carling Avenue, Rm. 6435, Ottawa, ON K1Z 7K4, Canada; Mental Health Centre, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
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Neural activity in macaque medial frontal cortex represents others' choices. Sci Rep 2017; 7:12663. [PMID: 28978915 PMCID: PMC5627293 DOI: 10.1038/s41598-017-12822-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 09/15/2017] [Indexed: 01/06/2023] Open
Abstract
Predicting the behavior of others is a fundamental skill in primate social life. We tested the role of medial frontal cortex in the prediction of other agents’ behavior in two male macaques, using a monkey-human interactive task in which their actor-observer roles were intermixed. In every trial, the observer monitored the actor’s choice to reject it for a different one when he became the actor on the subsequent trial. In the delay period preceding the action, we identified neurons modulated by the agent’s identity, as well as a group of neurons encoding the agent’s future choice, some of which were neurons that showed differential patterns of activity between agents. The ability of these neurons to flexibly move from ‘self-oriented’ to ‘other-oriented’ representations could correspond to the “other side of the coin” of the simulative mirroring activity. Neurons that changed coding scheme, together with neurons exclusively involved in the prediction of the other agent’s choice, show a neural substrate for predicting or anticipating others’ choices beyond simulation.
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