Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/33090
Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Network-wide abnormalities explain memory variability in hippocampal amnesia
Author(s): Argyropoulos, Georgios P D
Loane, Clare
Roca-Fernandez, Adriana
Lage-Martinez, Carmen
Gurau, Oana
Irani, Sarosh R
Butler, Christopher R
Issue Date: 8-Jul-2019
Date Deposited: 16-Aug-2021
Citation: Argyropoulos GPD, Loane C, Roca-Fernandez A, Lage-Martinez C, Gurau O, Irani SR & Butler CR (2019) Network-wide abnormalities explain memory variability in hippocampal amnesia. eLife, 8, Art. No.: e46156. https://doi.org/10.7554/eLife.46156
Abstract: Patients with hippocampal amnesia play a central role in memory neuroscience but the neural underpinnings of amnesia are hotly debated. We hypothesized that focal hippocampal damage is associated with changes across the extended hippocampal system and that these, rather than hippocampal atrophy per se, would explain variability in memory between patients. We assessed this hypothesis in a uniquely large cohort of patients (n=38) after autoimmune limbic encephalitis, a syndrome associated with focal structural hippocampal pathology. These patients showed impaired recall, recognition and maintenance of new information, and remote autobiographical amnesia. Besides hippocampal atrophy, we observed correlatively reduced thalamic and entorhinal cortical volume, resting-state inter-hippocampal connectivity and activity in posteromedial cortex. Associations of hippocampal volume with recall, recognition, and remote memory were fully mediated by wider network abnormalities, and were only direct in forgetting. Network abnormalities may explain the variability across studies of amnesia and speak to debates in memory neuroscience.
DOI Link: 10.7554/eLife.46156
Rights: © 2019, Argyropoulos et al. This article is distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use and redistribution provided that the original author and source are credited.
Licence URL(s): http://creativecommons.org/licenses/by/4.0/

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