Thalamic Connectivity System Across Psychiatric Disorders: Current Status and Clinical Implications

Area of Science:

• Neuroscience
• Psychiatry
• Systems Biology

Background:

• The thalamus acts as a central hub, connecting neural computations across the brain.
• Deficits in the thalamic connectivity system are increasingly linked to psychiatric disorders.
• Understanding these deficits is crucial for developing transdiagnostic markers.

Purpose of the Study:

• To review current knowledge on thalamic connectivity system deficits in major psychiatric disorders.
• To identify common and distinct patterns of these deficits.
• To explore potential mechanisms and future research directions.

Main Methods:

• Literature review of studies on thalamic connectivity in schizophrenia, bipolar disorder, major depressive disorder, and autism spectrum disorder.
• Analysis of evidence supporting thalamic microstructure and connectivity as potential diagnostic markers.
• Exploration of molecular and behavioral mechanisms underlying thalamocortical dysconnectivity.

Main Results:

• Common and distinct patterns of thalamic connectivity deficits exist across psychiatric disorders.
• Thalamic microstructure (mediodorsal nucleus) may indicate psychosis state.
• Thalamo-prefrontal connectivity may serve as a trait marker for psychosis.

Conclusions:

• Thalamic connectivity alterations are implicated in psychiatric disorders.
• Specific thalamic network features show potential as diagnostic markers.
• Further research into cerebellar-thalamic connectivity and molecular/behavioral impacts is warranted.