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Speed of time-compressed forward replay flexibly changes in human episodic memory

Michelmann, Sebastian, Staresina, Bernhard, Bowman, Howard, Hanslmayr, Simon (2019) Speed of time-compressed forward replay flexibly changes in human episodic memory. Nature Human Behavior, 3 . pp. 143-154. E-ISSN 2397-3374. (doi:10.1038/s41562-018-0491-4) (KAR id:71430)

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Remembering information from continuous past episodes is a complex task. On the one hand, we must be able to recall events in a highly accurate way that often includes exact timing; on the other hand, we can ignore irrelevant details and skip to events of interest. We here track continuous episodes, consisting of different sub-events, as they are recalled from memory. In behavioral and MEG data, we show that memory replay is temporally compressed and proceeds in a forward direction. Neural replay is characterized by the reinstatement of temporal patterns from encoding. These fragments of activity reappear on a compressed timescale. Herein, the replay of sub-events takes longer than the transition from one sub-event to another. This identifies episodic memory replay as a dynamic process in which participants replay fragments of fine-grained temporal patterns and are able to skip flexibly across sub-events.

Item Type: Article
DOI/Identification number: 10.1038/s41562-018-0491-4
Subjects: Q Science
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Computing
Depositing User: Howard Bowman
Date Deposited: 23 Dec 2018 12:19 UTC
Last Modified: 28 Jul 2022 22:08 UTC
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