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Callosal transfer in schizophrenia: too much or too little?
1Department of Psychological Medicine, King's College Hospital, London, England.
Journal of Abnormal Psychology
|November 1, 1993
Summary
Schizophrenia patients exhibit excessive callosal transfer, indicated by greater Stroop effects between brain hemispheres compared to controls. This suggests a specific functional abnormality in brain connectivity in schizophrenia.
Area of Science:
- Neuroscience
- Psychiatry
- Cognitive Psychology
Background:
- Schizophrenia is associated with abnormalities in interhemispheric communication.
- Callosal transfer, the communication between cerebral hemispheres, is a key area of investigation.
Purpose of the Study:
- To investigate functional abnormalities in callosal transfer in schizophrenia.
- To measure Stroop interference and facilitation within and between cerebral hemispheres.
Main Methods:
- Developed a novel test measuring Stroop effects within and between cerebral hemispheres.
- Tested 46 patients with schizophrenia and control groups (normal and affective disorder).
Main Results:
- Schizophrenic patients showed greater Stroop effects in interhemispheric conditions compared to controls.
- This suggests increased callosal connectivity in schizophrenia.
- No correlation found between callosal transfer index and gender, age, IQ, or clinical characteristics.
Conclusions:
- Results support a specific functional abnormality of excessive callosal transfer in schizophrenia.
- The precise role of this abnormality in the pathogenesis of schizophrenia requires further investigation.