Sleep Optimizes Motor Skill in Older Adults

Authors

Errata

This article is corrected by:

  1. Errata: ERRATUM Volume 59, Issue 6, 1161, Article first published online: 13 June 2011

Address correspondence to Matthew Tucker, Postdoctoral Fellow, Harvard Medical School, Center for Sleep and Cognition, Beth Israel Deaconess Medical Center, 330 Brookline Ave. Feldberg 862, Boston, MA 02215. E-mail: mtucker1@bidmc.harvard.edu

Abstract

OBJECTIVES: To determine whether sleep benefits motor memory in healthy elderly adults and, if so, whether the observed sleep-related benefits are comparable with those observed in healthy young adults.

DESIGN: Repeated-measures cross-over design.

SETTING: Boston, Massachusetts (general community) and Harvard University.

PARTICIPANTS: Sixteen healthy older and 15 healthy young participants.

MEASUREMENTS: Motor sequence task (MST) performance was assessed at training and at the beginning and end of the retest session; polysomnographic sleep studies were recorded for the elderly participants.

RESULTS: After 12 hours of daytime wakefulness, elderly participants showed a dramatic decline in MST performance on the first three retest trials, and only a nonsignificant improvement by the end of retest (the last 3 retest trials). In contrast, when the same participants trained in the morning but were retested 24 hours after training, after a day of wake plus a night of sleep, they maintained their performance at the beginning of retest and demonstrated a highly significant 17.4% improvement by the end of the retest session, essentially identical to the 17.3% improvement seen in young participants. These strikingly similar improvements occurred despite the presence of other age-related differences, including overall slower motor speed, a lag in the appearance of sleep-dependent improvement, and an absence of correlations between overnight improvement and sleep architecture or sleep spindle density in the elderly participants.

CONCLUSION: These findings provide compelling evidence that sleep optimizes motor skill performance across the adult life span.

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