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Updated: May 11, 2026

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Published on: April 26, 2024

Insomnia does not appear to be associated with substantial structural brain changes.

Kai Spiegelhalder¹, Wolfram Regen, Chiara Baglioni

¹Department of Psychiatry and Psychotherapy, University Medical Center Freiburg, Germany. Kai.Spiegelhalder@uniklinik-freiburg.de

|May 2, 2013

Summary

This study found no significant differences in brain structure between individuals with primary insomnia and good sleepers. These findings suggest that disrupted sleep does not substantially alter brain morphometry at a macroscopic level.

Keywords:

Hippocampus MRI primary insomnia sleep support vector machine voxel-based morphometry

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Area of Science:

Neuroscience
Sleep Medicine
Psychiatry

Background:

Sleep significantly influences brain plasticity and mental health.
Previous research on sleep disruption's effect on brain structure yielded inconsistent findings.
Primary insomnia (PI) is a common sleep disorder with potential neurological underpinnings.

Purpose of the Study:

To investigate brain morphometry in a large cohort of patients with primary insomnia compared to healthy controls.
To address inconsistencies in prior research regarding sleep disruption and brain structure.

Main Methods:

Magnetic resonance imaging (MRI) was used to analyze brain morphometry.
Automated parcellation, pattern recognition, and voxelwise analyses of gray and white matter volumes were employed.
Analyses controlled for age, sex, and total intracranial volume.

Main Results:

No significant differences in brain morphometry variables were detected between the primary insomnia group and the good sleeper control group.
This indicates a lack of substantial macroscopic structural changes in the brain associated with primary insomnia.

Conclusions:

Altered brain function in insomnia does not appear to significantly impact brain morphometry on a macroscopic scale.
Further research may be needed to explore potential microscopic or functional brain alterations in insomnia.