Structure/function interrelationships and illness insight in patients with schizophrenia: a multimodal MRI data...

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Illness insight is crucial for schizophrenia (SZ) treatment and societal integration.
• Reduced insight in SZ is linked to altered brain volumes in cognitive control and self-reference areas.
• Understanding structural and functional network associations with insight in SZ is limited.

Purpose of the Study:

• To investigate structural and functional brain network differences in patients with schizophrenia compared to healthy controls.
• To examine the relationship between illness insight and these neural network alterations in SZ.
• To identify specific brain regions and networks associated with illness insight in schizophrenia.

Main Methods:

• Cross-sectional study comparing 74 SZ patients and 47 healthy controls (HC).
• Utilized structural MRI for voxel-based morphometry and resting-state fMRI for amplitude of low-frequency fluctuations (ALFF).
• Employed parallel independent component analysis (pICA) to analyze structure-function interrelationships and insight associations.

Main Results:

• Significant structural and functional network differences were found between SZ and HC groups, particularly in frontoparietal, temporal, and cerebellar regions.
• Illness insight was significantly associated with structural networks in frontoparietal and posterior cortical areas.
• A significant association was also observed between illness insight and a functional network involving temporal regions.

Conclusions:

• Aberrant structural and functional integrity in neural systems for cognitive control, memory, and self-reference are closely linked to illness insight in schizophrenia.
• These findings highlight the neural underpinnings of illness insight and suggest potential targets for therapeutic interventions.
• Further research into these neural correlates may improve treatment strategies for schizophrenia.