Sleep-dependent motor memory consolidation in healthy adults: A meta-analysis

Schmid, Daniel; Erlacher, Daniel; Klostermann, André; Kredel, Ralf; Hossner, Ernst-Joachim (2020). Sleep-dependent motor memory consolidation in healthy adults: A meta-analysis. Neuroscience & biobehavioral reviews, 118, pp. 270-281. Elsevier 10.1016/j.neubiorev.2020.07.028

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It is widely accepted that sleep better facilitates the consolidation of motor memories than does a corresponding wake interval (King et al., 2017). However, no in-depth analysis of the various motor tasks and their relative sleep gain has been conducted so far. Therefore, the present meta-analysis considered 48 studies with a total of 53 sleep (n = 829) and 53 wake (n = 825) groups. An overall comparison between all sleep and wake groups resulted in a small effect for the relative sleep gain in motor memory consolidation (g = 0.43). While no subgroup differences were identified for differing designs, a small effect for the finger tapping task (g = 0.47) and a medium effect for the mirror tracing task (g = 0.62) were found. In summary, the meta-analysis substantiates that sleep generally benefits the consolidation of motor memories. However, to further our understanding of the mechanisms underlying this effect, examining certain task dimensions and their relative sleep gain would be a promising direction for future research.

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