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The Temporal Signature of Memories: Identification of a General Mechanism for Dynamic Memory Replay in Humans

Michelmann, Sebastian, Bowman, Howard, Hanslmayr, Simon (2016) The Temporal Signature of Memories: Identification of a General Mechanism for Dynamic Memory Replay in Humans. PLoS Biology, 8 (14). pp. 1-27. ISSN 1544-9173. E-ISSN 1002528. (doi:10.1371/journal.pbio.1002528)

Abstract

Reinstatement of dynamic memories requires the replay of neural patterns that unfold over time in a similar manner as during perception. However, little is known about the mechanisms that guide such a temporally structured replay in humans, because previous studies used either unsuitable methods or paradigms to address this question. Here, we overcome these limitations by developing a new analysis method to detect the replay of temporal patterns in a paradigm that requires participants to mentally replay short sound or video clips. We show that memory reinstatement is accompanied by a decrease of low-frequency (8 Hz) power, which carries a temporal phase signature of the replayed stimulus. These replay effects were evident in the visual as well as in the auditory domain and were localized to sensory-specific regions. These results suggest low-frequency phase to be a domain-general mechanism that orchestrates dynamic memory replay in humans.

Item Type: Article
DOI/Identification number: 10.1371/journal.pbio.1002528
Uncontrolled keywords: Episodic memory, EEG, oscillations
Subjects: Q Science > Q Science (General)
Q Science > QP Physiology (Living systems)
Divisions: Faculties > Sciences > School of Computing > Computational Intelligence Group
Depositing User: Howard Bowman
Date Deposited: 21 Sep 2016 13:33 UTC
Last Modified: 29 May 2019 17:52 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/57412 (The current URI for this page, for reference purposes)
Bowman, Howard: https://orcid.org/0000-0003-4736-1869
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