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Hippocampal volumes do not discriminate a typical clinical population of elderly depressed patients from age-similar normal control subjects. If hippocampal dysfunction contributes to a diagnosis of syndromal depression in the elderly, such dysfunction does not appear to be regularly reflected in structural abnormalities captured by volumetric measurement as conducted. On the other hand, relationships between hippocampal volumes and clinical phenomena in depressives, but not controls, suggest potentially meaningful interactions between hippocampal structure and the expression of major depression in the elderly.
Ashtari et al. (Sat,) studied this question.