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Neuroanatomical substrates of depression in the elderly
K R Krishnan1, W M McDonald, P M Doraiswamy
1Duke University Medical Center, Durham, NC 27710.
European Archives of Psychiatry and Clinical Neuroscience
|January 1, 1993
Summary
Depression in older adults may stem from changes in deep brain structures. This study found smaller basal ganglia and more subcortical lesions in elderly depressed patients, particularly those with late-onset depression.
Area of Science:
- Neuroscience
- Geriatrics
- Psychiatry
Background:
- The causes of depression in the elderly are not well understood.
- Subcortical structures, including the basal ganglia, are increasingly implicated in mood disorders.
Purpose of the Study:
- To investigate the role of subcortical brain structures in the pathophysiology of depression in the elderly.
- To compare neuroimaging findings between elderly depressed patients and healthy controls.
Main Methods:
- Magnetic resonance imaging (MRI) was used to examine brain structure.
- Quantitative analysis of subcortical nuclei volumes and subcortical hyperintensities.
Main Results:
- Elderly depressed patients exhibited smaller caudate nuclei and putaminal complexes compared to controls.
- An increased frequency of subcortical hyperintensities was observed in depressed elderly individuals.
- These neuroanatomical differences were more pronounced in patients with late-onset depression.
Conclusions:
- The basal ganglia play a significant role in the pathophysiology of depression in the elderly.
- Structural changes in subcortical regions may be key indicators for depression in older adults.
- Findings suggest potential targets for understanding and treating geriatric depression.