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Updated: Jul 10, 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

Mood disorders.

Deborah A Yurgelun-Todd¹, Simona Sava, Mary Kathryn Dahlgren

¹Department of Psychiatry, Harvard Medical School, Boston, MA 02215, USA. ytodd@mclean.harvard.edu

Neuroimaging Clinics of North America

|November 7, 2007

Summary

Neuroimaging studies reveal altered brain activation in mood disorders like depression and bipolar illness. These functional changes occur in emotional processing regions but are complicated by various patient-specific factors.

Area of Science:

Neuroscience
Psychiatry

Background:

Mood disorders, including depression and bipolar illness, are common but their neuropathology remains unclear.
Understanding the brain's functional changes is crucial for advancing treatment.

Purpose of the Study:

To review neuroimaging findings in mood disorders.
To identify brain regions with abnormal activation in depression and bipolar illness.

Main Methods:

Review of functional neuroimaging studies in patients with mood disorders.
Analysis of reported abnormalities in brain activation patterns.

Main Results:

Functional changes identified in frontal, subcortical, and limbic regions.
These regions are critical for emotional processing networks.

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Abnormalities in brain activation are consistently reported across studies.

Conclusions:

Neuroimaging highlights functional alterations in key brain areas for emotional processing in mood disorders.
Interpreting these findings requires consideration of confounding factors like medication and illness duration.