Compression of Cerebellar Functional Gradients in Schizophrenia

Area of Science:

• Neuroscience
• Psychiatry
• Brain Imaging

Background:

• Cerebellar function extends beyond motor control to cognition and emotion.
• Schizophrenia involves cerebellar dysfunction, but the interaction of low- and high-level abnormalities is unclear.
• Brain organization principles, like hierarchy, are crucial for understanding neural processing.

Purpose of the Study:

• To investigate hierarchical processing topography abnormalities in the cerebellum and its circuits in schizophrenia.
• To establish a neurobiological framework for co-occurring cerebellar functional abnormalities in schizophrenia.

Main Methods:

• Utilized gradient-based resting-state functional connectivity (FC) analysis.
• Compared 96 patients with schizophrenia to 120 healthy controls.
• Examined intra-cerebellar, cerebellar-cerebral, and cerebral-cerebellar FC.

Main Results:

• Schizophrenia patients showed a compressed motor-to-supramodal gradient in the cerebellum.
• Increased gradient values in sensorimotor regions and decreased values in supramodal regions were observed.
• Hyper-connectivity was found between sensorimotor and cognition areas within and between the cerebellum and cerebrum.

Conclusions:

• A compressed hierarchical organization in the cerebellum may underlie schizophrenia pathophysiology.
• Disrupted sensorimotor processing could cascade to affect high-level cognitive functions in schizophrenia.
• Findings offer a novel mechanism for understanding cerebellar and cerebro-cerebellar circuit dysfunction in schizophrenia.