Subcortical volumetric changes in MDD have been purported to underlie the symptoms of MDD, however, the evidence to date remains inconsistent. Here, we investigated the relationship between structural limbic brain measurements and MDD symptomology through high-resolution segmentation of the amygdala and hippocampus. We report the novel finding that MDD severity is consistently negatively associated with amygdala nuclei, linking volumetric reductions with worsening depressive symptoms.
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