Cortical Thinning and Abnormal Structural Covariance Network After Three Hours Sleep Restriction

Area of Science:

• Neuroscience
• Cognitive Psychology
• Medical Imaging

Background:

• Sleep deprivation negatively impacts cognitive functions like attention and emotional processing.
• Previous research linked sleep deprivation to altered functional brain connectivity, but structural mechanisms remain unclear.

Purpose of the Study:

• To investigate the structural connectivity changes in the brain following short-term sleep restriction.
• To examine how sleep restriction affects cortical thickness and network topology.

Main Methods:

• Surface morphological analysis was used to measure changes in cortical thickness.
• Graph theoretical analysis assessed the topological properties of the structural covariance network.
• Participants underwent 3 hours of sleep restriction.

Main Results:

• Sleep restriction significantly reduced cortical thickness in the right parieto-occipital cortex (Brodmann area 19).
• Graph analysis revealed increased global network properties (clustering coefficient, local efficiency) and nodal properties (efficiency, betweenness) in the left insula cortex.
• These structural changes occurred after only 3 hours of sleep restriction.

Conclusions:

• Short-term sleep restriction induces measurable changes in brain structure and network topology.
• Altered structural covariance networks may underlie neurobehavioral deficits associated with sleep loss.
• Findings provide insights into the structural basis of brain network dysfunction after sleep restriction.