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Hippocampal/amygdala volumes in geriatric depression
M Ashtari1, B S Greenwald, E Kramer-Ginsberg
1Division of Geriatric Psychiatry and the Brain Morphometry and Image Analysis Center, Hillside Hospital, Glen Oaks, New York 11004, USA.
Psychological Medicine
|July 15, 1999
Summary
Hippocampal volumes did not differ between elderly depressed patients and controls. However, in depressed individuals, hippocampal size correlated with age and symptom severity, suggesting a link between brain structure and depression expression in older adults.
Area of Science:
- Neuroimaging
- Geriatric Psychiatry
- Neuroscience
Background:
- The hippocampus and amygdala are crucial for emotional and memory processing, often impaired in major depression.
- Previous studies suggest structural abnormalities in these areas in depressed individuals.
Purpose of the Study:
- To investigate volumetric differences in the hippocampus and amygdala between elderly depressed patients and age-similar controls.
- To explore correlations between hippocampal volume and clinical factors in elderly depression.
Main Methods:
- Magnetic resonance imaging (MRI) was used to measure hippocampal and amygdala volumes in 40 elderly depressed patients and 46 healthy controls.
- Semi-automated computer mensuration system applied under blinded conditions.
Main Results:
- No significant differences in medial temporal volumes were found between elderly depressed patients and controls.
- Hippocampal volumes in depressed patients correlated with age, cognitive function, and depression ratings.
Conclusions:
- Hippocampal volume, as measured, does not distinguish elderly depressed patients from controls.
- Interactions between hippocampal structure and the manifestation of major depression in the elderly may exist.