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However, the particular mechanisms by which memory impairment occurs in LLD are currently unknown. We tested older adults with (DS+) and without (DS\u2212) depressive symptoms using high\u2010resolution fMRI that is capable of discerning signals in hippocampal subfields and amygdala nuclei. Scanning was conducted during performance of an emotional discrimination task used previously to examine the relationship between depressive symptoms and amygdala\u2010mediated emotional modulation of hippocampal pattern separation in young adults. We found that hippocampal dentate gyrus (DG)\/CA3 activity was reduced during correct discrimination of negative stimuli and increased during correct discrimination of neutral items in DS+ compared to DS\u2212 adults. The extent of the latter increase was correlated with symptom severity. Furthermore, DG\/CA3 and basolateral amygdala (BLA) activity predicted discrimination performance on negative trials, a relationship that depended on symptom severity. The impact of the BLA on depressive symptom severity was mediated by the DG\/CA3 during discrimination of neutral items, and by the lateral entorhinal cortex (LEC) during false recognition of positive items. These results shed light on a novel mechanistic account for amygdala\u2013hippocampal network changes and concurrent alterations in emotional episodic memory in LLD. The BLA\u2010LEC\u2010DG\/CA3 network, which comprises a key pathway by which emotion modulates memory, is specifically implicated in LLD. \u00a9 2017 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/hipo.22705","type":"journal-article","created":{"date-parts":[[2017,1,13]],"date-time":"2017-01-13T22:07:21Z","timestamp":1484345241000},"page":"464-476","source":"Crossref","is-referenced-by-count":46,"title":["Disruption of amygdala\u2013entorhinal\u2013hippocampal network in late\u2010life depression"],"prefix":"10.1002","volume":"27","author":[{"given":"Stephanie L.","family":"Leal","sequence":"first","affiliation":[{"name":"Helen Wills Neuroscience Institute, University of California Berkeley California"},{"name":"Department of Neurobiology and Behavior Center for the Neurobiology of Learning and Memory, Institute for Memory Impairments and Neurological Disorders, University of California Irvine California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jessica 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