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Microstructural abnormalities in callosal fibers and their relationship with cognitive function in schizophrenia: A
Yuji Ohoshi1, Shun Takahashi1, Shinichi Yamada1
1Department of Neuropsychiatry, Wakayama Medical University, Wakayama, Japan.
Brain and Behavior
|July 9, 2019
Summary
Microstructural abnormalities in the corpus callosum
Area of Science:
- Neuroscience
- Psychiatry
- Brain Imaging
Background:
- Schizophrenia is characterized by cognitive impairment, with unknown pathophysiology.
- The corpus callosum facilitates interhemispheric communication, crucial for cognition.
Purpose of the Study:
- To investigate the link between corpus callosum microstructural integrity and cognitive deficits in schizophrenia.
- To explore the association between fractional anisotropy (FA) in specific callosal segments and cognitive performance.
Main Methods:
- Diffusion tensor imaging (DTI) and tract-specific analysis were used to segment the corpus callosum.
- Stepwise multiple regression analysis examined the relationship between callosal FA and cognitive test scores in schizophrenia patients and healthy controls.
Main Results:
- Reduced FA in the temporal segment of the corpus callosum was observed in schizophrenia patients compared to controls.
- Temporal segment FA correlated with executive function (Tower of London test) and negative symptoms in schizophrenia patients.
Conclusions:
- Microstructural abnormalities in the temporal segment of the corpus callosum are associated with executive dysfunction and negative symptoms in schizophrenia.
- These findings highlight the role of interhemispheric white matter integrity in schizophrenia pathophysiology.
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