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Smaller cingulate volumes in unipolar depressed patients
Sheila C Caetano1, Simerjit Kaur, Paolo Brambilla
1Department of Psychiatry, Division of Mood and Anxiety Disorders, The University of Texas Health Science Center at San Antonio, Texas 78229, USA.
Biological Psychiatry
|January 18, 2006
Summary
Unipolar depression is linked to smaller cingulate cortex volumes. Currently depressed individuals show reduced anterior and posterior cingulate gray matter, suggesting state-dependent changes.
Area of Science:
- Neuroimaging
- Neuroscience
- Psychiatry
Background:
- The anterior cingulate cortex plays a crucial role in mood regulation.
- Abnormalities in the anterior cingulate cortex are potentially involved in depression's pathophysiology.
Purpose of the Study:
- To compare cingulate cortex volumes in unipolar depression patients versus healthy controls using anatomical MRI.
- To investigate potential state- and trait-related changes in cingulate gray matter.
Main Methods:
- Anatomical magnetic resonance imaging (MRI) was used to study 31 unmedicated unipolar patients and 31 healthy controls.
- Cingulate volumes were compared using analysis of covariance, controlling for intracranial volume.
Main Results:
- Unipolar patients exhibited significantly smaller bilateral anterior and posterior cingulate volumes compared to controls.
- Currently depressed patients showed smaller bilateral anterior and posterior cingulate volumes.
- Remitted patients had significantly smaller left anterior cingulate volumes compared to healthy individuals.
Conclusions:
- Gray matter abnormalities in the cingulate cortex are implicated in unipolar depression.
- Smaller cingulate volumes in currently depressed patients suggest state-dependent changes.
- Alterations in the left anterior cingulate may represent trait-related changes in depression.
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