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On disturbed time continuity in schizophrenia: an elementary impairment in visual perception?
Anne Giersch1, Laurence Lalanne, Mitsouko van Assche
1INSERM U1114, Department of Psychiatry, Fédération de Médecine Translationnelle de Strasbourg (FMTS), University Hospital of Strasbourg Strasbourg, France.
Frontiers in Psychology
|June 12, 2013
Summary
Patients with schizophrenia show impaired implicit time-event coding, affecting their perception of simultaneity. This difficulty in processing sequential events may explain disrupted time continuity and visual disturbances in schizophrenia.
Area of Science:
- Neuroscience
- Psychiatry
- Cognitive Science
Background:
- Schizophrenia is linked to visual perception deficits impacting daily life and clinical symptoms.
- Understanding these visual impairments is challenging due to their heterogeneity.
- Time perception may offer a novel perspective on schizophrenia-related disorders.
Purpose of the Study:
- To investigate the role of time-event structure coding in schizophrenia.
- To examine the ability to discriminate between simultaneous and asynchronous events.
- To explore potential mechanisms underlying visual and temporal processing deficits.
Main Methods:
- Reviewed literature on time continuity mechanisms and schizophrenia.
- Employed an experimental approach analyzing the coding of time-event structure.
- Utilized an original analysis method to differentiate explicit and implicit synchrony judgments.
Main Results:
- Neither patients nor controls fused events below 20ms stimulus onset asynchrony (SOA).
- Both groups implicitly distinguished events, even when judged synchronous.
- Patients and controls showed qualitative differences in implicit responses, with patients struggling to track events implicitly.
Conclusions:
- Schizophrenia patients exhibit impaired implicit coding of time-event structure, particularly at short SOAs.
- This deficit may explain the disrupted sense of time continuity in schizophrenia.
- Findings suggest selective mechanisms for implicit time coding and offer insights into visual perception in schizophrenia.
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