Brain morphological and functional features in cognitive subgroups of schizophrenia

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Schizophrenia is associated with varied brain morphologies across cognitive profiles.
• Understanding these differences is crucial for targeted interventions.

Purpose of the Study:

• To investigate brain structure and functional connectivity in distinct cognitive subgroups of schizophrenia patients.
• To compare these neurobiological markers between cognitively deteriorated, preserved, and healthy control groups.

Main Methods:

• Utilized resting-state functional magnetic resonance imaging (fMRI) to assess brain structures and functional connectivity.
• Compared brain volumes, cortical thickness, and inter-regional connectivity across healthy controls, and schizophrenia patients with cognitive decline (deteriorated) and preserved cognition.

Main Results:

• The deteriorated schizophrenia group showed reduced gray matter, cortical thickness, and specific gyrus volumes compared to controls and the preserved group.
• Both schizophrenia subgroups displayed altered ventricular and subcortical volumes, including hippocampus and frontal/precentral gyri.
• Hyperconnectivity was observed between the thalamus and various brain regions in the deteriorated group, and between the accumbens and frontal gyri in the preserved group.

Conclusions:

• Schizophrenia exhibits significant structural and functional brain abnormalities that vary by cognitive status.
• Cognitive subgroups may serve as valuable biotypes for understanding schizophrenia pathophysiology.
• These findings could inform novel diagnostic and therapeutic strategies for schizophrenia.