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Cued memory reactivation during slow-wave sleep promotes explicit knowledge of a motor sequence

Cousins, James M., El-Deredy, Wael, Parkes, Laura M., Hennies, Nora and Lewis, Penelope A. 2014. Cued memory reactivation during slow-wave sleep promotes explicit knowledge of a motor sequence. Journal of Neuroscience 34 (48) , pp. 15870-15876. 10.1523/JNEUROSCI.1011-14.2014

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Abstract

Memories are gradually consolidated after initial encoding, and this can sometimes lead to a transition from implicit to explicit knowledge. The exact physiological processes underlying this reorganization remain unclear. Here, we used a serial reaction time task to determine whether targeted memory reactivation (TMR) of specific memory traces during slow-wave sleep promotes the emergence of explicit knowledge. Human participants learned two 12-item sequences of button presses (A and B). These differed in both cue order and in the auditory tones associated with each of the four fingers (one sequence had four higher-pitched tones). Subsequent overnight sleep was monitored, and the tones associated with one learned sequence were replayed during slow-wave sleep. After waking, participants demonstrated greater explicit knowledge (p = 0.005) and more improved procedural skill (p = 0.04) for the cued sequence relative to the uncued sequence. Furthermore, fast spindles (13.5–15 Hz) at task-related motor regions predicted overnight enhancement in procedural skill (r = 0.71, p = 0.01). Auditory cues had no effect on post-sleep memory performance in a control group who received TMR before sleep. These findings suggest that TMR during sleep can alter memory representations and promote the emergence of explicit knowledge, supporting the notion that reactivation during sleep is a key mechanism in this process.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Uncontrolled Keywords: consolidation; explicit memory; learning; reactivation; replay; slow-wave sleep
Publisher: Society for Neuroscience
ISSN: 0270-6474
Last Modified: 04 Jun 2017 08:51
URI: http://orca.cf.ac.uk/id/eprint/86546

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Cited 21 times in Scopus. View in Scopus. Powered By Scopus® Data

Cited 2 times in Web of Science. View in Web of Science.

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