Enhanced intrathalamic morphological connectivity in patients with chronic insomnia

Area of Science:

• Neuroscience
• Medical Imaging
• Psychiatry

Background:

• Chronic insomnia is a prevalent sleep disorder affecting millions worldwide.
• The thalamus plays a crucial role in sleep regulation and sensory processing.
• Abnormal brain connectivity is increasingly implicated in the pathophysiology of insomnia.

Purpose of the Study:

• To investigate differences in morphological connectivity within and between thalamic subregions in patients with chronic insomnia compared to healthy controls.
• To explore the clinical relevance of observed connectivity alterations in chronic insomnia.

Main Methods:

• Utilized the Human Brainnetome Atlas to define thalamic subregions.
• Computed and compared intrathalamic and thalamocortical morphological connectivity between chronic insomnia patients (n=102) and healthy controls (n=101).
• Employed Spearman's correlation to assess associations between connectivity and clinical variables.

Main Results:

• Patients with chronic insomnia exhibited significantly higher intrathalamic morphological connectivity compared to controls.
• No significant differences in thalamocortical morphological connectivity were found between groups.
• No significant correlation was identified between altered intrathalamic connectivity and clinical/behavioral scales.

Conclusions:

• Findings suggest increased intrathalamic morphological connectivity in chronic insomnia.
• These results contribute to understanding the neural underpinnings of insomnia at an individual level.
• The study provides novel perspectives for potential clinical interventions and diagnostic imaging in chronic insomnia.