Altered brain connectivity in patients with schizophrenia is consistent across cognitive contexts

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Science

Background:

• Schizophrenia is characterized as a dysconnection syndrome with aberrant functional brain connectivity.
• Task-based functional magnetic resonance imaging (fMRI) is used to investigate how cognitive context modulates these abnormalities.

Purpose of the Study:

• To assess the extent to which cognitive context modulates abnormal functional brain connectivity in patients with schizophrenia.
• To identify context-dependent and independent functional brain connectivity alterations.

Main Methods:

• Analysis of motion-matched fMRI data from 30 patients with schizophrenia and 30 healthy controls.
• Performance of three distinct tasks: two emotional processing tasks and one mental rotation task.
• Connectome-wide general linear model analysis.

Main Results:

• Abnormal connectivity patterns in schizophrenia patients remained consistent across tasks with varying cognitive demands.
• Significant reductions in functional connectivity were observed in regions including the medial prefrontal cortex, cingulate cortex, temporal lobe, cerebellum, and premotor cortex.
• Connectivity alterations were largely independent of the cognitive task context.

Conclusions:

• The context-independence of functional brain dysconnectivity in schizophrenia supports pooling data from diverse experimental paradigms.
• This approach can enhance the identification of robust connectivity biomarkers for schizophrenia.