Abnormal cortical folding patterns within Broca's area in schizophrenia: evidence from structural MRI

Area of Science:

• Neuroimaging
• Cognitive Neuroscience
• Psychiatry

Background:

• Schizophrenia is a complex psychiatric disorder associated with cognitive deficits.
• Altered brain structure, including cortical morphology, is frequently observed in patients with schizophrenia.
• The neurodevelopmental hypothesis posits that schizophrenia arises from disruptions during brain development.

Purpose of the Study:

• To compare cortical folding patterns in patients with schizophrenia and healthy controls.
• To investigate potential differences in prefrontal and temporal cortical regions.
• To explore the relationship between cortical folding abnormalities and the neurodevelopmental hypothesis of schizophrenia.

Main Methods:

• Utilized Freesurfer software for cortical surface-based reconstruction.
• Measured metric distortion to indirectly assess cortical displacement and convolution.
• Compared folding patterns between schizophrenia patients and demographically-matched healthy controls.

Main Results:

• Significantly reduced metric distortion was observed in the pars triangularis of the left inferior frontal gyrus (Broca's area) in schizophrenia patients compared to controls (p=0.0352).
• This suggests altered cortical folding in a critical language-related brain region.

Conclusions:

• The findings indicate abnormal cortical folding in Broca's area in individuals with schizophrenia.
• These results lend support to the neurodevelopmental hypothesis of schizophrenia.
• The observed cortical differences may contribute to language dysfunction observed in schizophrenia.