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Correlations between clinical symptoms, working memory functions and structural brain abnormalities in men with
István Szendi1, Marianna Kiss, Mihály Racsmány
1Department of Psychiatry, University of Szeged, Hungary. szendi@nepsy.szote.u-szeged.hu
Psychiatry Research
|March 21, 2006
Summary
Schizophrenia patients showed no significant brain volume differences but altered straight gyrus (SG) laterality. Negative symptoms correlated with cognitive deficits and specific brain region volumes.
Area of Science:
- Neuroimaging
- Neuropsychology
- Psychiatry
Background:
- Schizophrenia is a complex mental disorder.
- Structural brain abnormalities are often reported in schizophrenia.
- The role of specific brain regions like the straight gyrus (SG) requires further investigation.
Purpose of the Study:
- To compare brain volumes and laterality in male schizophrenic patients versus healthy controls.
- To investigate the relationship between brain structure, cognitive function, and symptom severity in schizophrenia.
Main Methods:
- Magnetic Resonance Imaging (MRI) was used to measure brain volumes in specific regions.
- Neuropsychological tasks assessed working memory and executive functions.
- Neurological signs were evaluated using the Neurological Evaluation Scale (NES).
Main Results:
- No significant differences in mean volumes of most brain regions were found between groups.
- A significant shift in straight gyrus (SG) laterality from left to right dominance was observed in patients.
- Schizophrenic patients exhibited poorer working memory and executive function performance, with significant differences in neurological signs.
Conclusions:
- While overall brain volumes may not differ, altered SG laterality is a key finding in schizophrenia.
- Negative symptoms in schizophrenia are associated with impaired working memory, executive functions, and specific brain region volumes (right hippocampus, left SG).