Cingulum and abnormal psychological stress response in schizophrenia

Area of Science:

• Neuroscience
• Psychiatry
• Neuroimaging

Background:

• Stress significantly impacts schizophrenia, particularly distress intolerance.
• Brain microstructural integrity and affective responses are key factors in understanding distress intolerance.

Purpose of the Study:

• To investigate the relationship between affect, brain microstructure, and distress intolerance in schizophrenia spectrum disorders.
• To examine how the dorsal cingulum's white matter integrity relates to distress intolerance and affective responses to stress.

Main Methods:

• Diffusion weighted imaging (DWI) was used to assess white matter microstructure.
• Schizophrenia patients (n=78) and controls (n=95) underwent psychological stress tasks.
• Subjective affect and performance were measured pre- and post-stress.

Main Results:

• Lower fractional anisotropy (FA) in the dorsal cingulum was observed in distress-intolerant (DI) patients compared to DI controls.
• Affective responses to stress, specifically irritability, showed altered patterns in DI patients.
• Dorsal cingulum FA predicted distress intolerance, even when accounting for performance and irritability.

Conclusions:

• Distress intolerance in schizophrenia is associated with microstructural abnormalities in the dorsal cingulum.
• The findings suggest impaired emotion regulation and cognitive control in distress-intolerant individuals with schizophrenia.
• Abnormal affective responses to stressors are linked to dorsal cingulum integrity in schizophrenia.