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Interhemispheric transfer of information and schizophrenia
1Psychology Department, Institute of Psychiatry, University of London, England.
European Archives of Psychiatry and Neurological Sciences
|January 1, 1990
Summary
This study investigated interhemispheric transfer in schizophrenia, finding no general impairment. However, non-paranoid schizophrenics showed deficits suggesting left hemisphere dysfunction, challenging previous corpus callosum theories.
Area of Science:
- Neuroscience
- Psychiatry
- Cognitive Psychology
Background:
- Previous research suggests schizophrenia may involve corpus callosum dysfunction.
- Methodological limitations exist in prior studies on interhemispheric transfer in schizophrenia.
Purpose of the Study:
- To investigate interhemispheric transfer of stereognostic information in paranoid schizophrenics, non-paranoid schizophrenics, other psychiatric patients, and normal controls.
- To examine potential left hemisphere dysfunction in non-paranoid schizophrenics.
Main Methods:
- Four groups (paranoid schizophrenics, non-paranoid schizophrenics, psychiatric patients, normals) performed a stereognostic information transfer task.
- Inter-manual and same-hand conditions were compared to assess information transfer across cerebral hemispheres.
Main Results:
- No evidence of impaired interhemispheric transfer was found in schizophrenic groups overall.
- Non-paranoid schizophrenics performed significantly worse than all other groups on a no-transfer condition, indicating potential left hemisphere dysfunction.
Conclusions:
- The findings do not support a general interhemispheric transfer deficit in schizophrenia.
- Specific deficits in non-paranoid schizophrenia suggest a localized dysfunction, possibly in the left hemisphere.
- Methodological differences may explain discrepancies with previous research.