Neural activity reveals interactions between episodic and semantic memory systems during retrieval.
Publication/Presentation Date
1-1-2019
Abstract
Whereas numerous findings support a distinction between episodic and semantic memory, it is now widely acknowledged that these two forms of memory interact during both encoding and retrieval. The precise nature of this interaction, however, remains poorly understood. To examine the role of semantic organization during episodic encoding and retrieval, we recorded intracranial encephalographic signals as 69 neurosurgical patients studied and subsequently recalled categorized and unrelated word lists. Applying multivariate classifiers to neural recordings, we were able to reliably predict encoding success, retrieval success, and temporal and categorical clustering during recall. By assessing how these classifiers generalized across list types, we identified specific retrieval processes that predicted recall of categorized lists and distinguished between recall transitions within and between category clusters. These results particularly implicate retrieval (rather than encoding) processes in the categorical organization of episodic memories. (PsycINFO Database Record (c) 2018 APA, all rights reserved).
Volume
148
Issue
1
First Page
1
Last Page
12
ISSN
1939-2222
Published In/Presented At
Weidemann, C. T., Kragel, J. E., Lega, B. C., Worrell, G. A., Sperling, M. R., Sharan, A. D., Jobst, B. C., Khadjevand, F., Davis, K. A., Wanda, P. A., Kadel, A., Rizzuto, D. S., & Kahana, M. J. (2019). Neural activity reveals interactions between episodic and semantic memory systems during retrieval. Journal of experimental psychology. General, 148(1), 1–12. https://doi.org/10.1037/xge0000480
Disciplines
Medicine and Health Sciences
PubMedID
30596439
Department(s)
Department of Medicine
Document Type
Article