Reduced Theta Power During Memory Retrieval in Depressed Adults.

Affiliation

Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, Massachusetts; Harvard Medical School, Boston, Massachusetts. Electronic address: [Email]

Abstract

Major depressive disorder (MDD) is associated with poor recollection, but the neural mechanisms responsible for this deficit are unclear. Recollection is supported by interactions between the hippocampus and cortex that appear to be mediated by oscillatory activity in the theta band (4-7 Hz) and that are elicited during source memory retrieval. Therefore, we tested the hypothesis that evoked theta power during source memory retrieval would be reduced in MDD, as this would provide a physiological basis for deficient recollection in adults with depression.

Keywords

Depression,EEG,Memory,Retrieval,Theta,Time frequency,