Young and Older Adults Benefit From Sleep, but Not From Active Wakefulness for Memory Consolidation of What-Where-When Naturalistic Events
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20 mars 2019
- ISIDORE Id: 10670/1.806e38...
- hal: hal-04025197
- doi: 10.3389/fnagi.2019.00058
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info:eu-repo/semantics/altIdentifier/doi/10.3389/fnagi.2019.00058
info:eu-repo/semantics/OpenAccess
Mots-clés
episodic memory binding What-Where-When task consolidation sleep awake active state aging virtual reality episodic memory binding What-Where-When task consolidation sleep awake active state aging virtual realityCiter ce document
Kouloud Abichou et al., « Young and Older Adults Benefit From Sleep, but Not From Active Wakefulness for Memory Consolidation of What-Where-When Naturalistic Events », HAL SHS (Sciences de l’Homme et de la Société), ID : 10.3389/fnagi.2019.00058
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Résumé
An extensive psychological literature shows that sleep actively promotes humanepisodic memory (EM) consolidation in younger adults. However, evidence for thebenefit of sleep for EM consolidation in aging is still elusive. In addition, most ofthe previous studies used EM assessments that are very different from everyday lifeconditions and are far from considering all the hallmarks of this memory system. In thisstudy, the effect of an extended period of sleep was compared to the effect of anextended period of active wakefulness on the EM consolidation of naturalistic events,using a novel (What-Where-When) EM task, rich in perceptual details and spatiotemporal context, presented in a virtual environment. We investigated the long-termWhat-Where-When and Details binding performances of young and elderly peoplebefore and after an interval of sleep or active wakefulness. Although we found anoticeable age-related decline in EM, both age groups benefited from sleep, but not fromactive wakefulness. In younger adults, only the period of sleep significantly enhancedthe capacity to associate different components of EM (binding performance) and morespecifically the free recall of what-when information. Interestingly, in the elderly, sleepsignificantly enhanced not only the recall of factual elements but also associated detailsand contextual information as well as the amount of high feature binding (i.e., WhatWhere-When and Details). Thus, this study evidences the benefit of sleep, and thedetrimental effect of active wakefulness, on long-term feature binding, which is one ofthe core characteristics of EM, and its effectiveness in normal aging. However, furtherresearch should investigate whether this benefit is specific to sleep or more generallyresults from the effect of a post-learning period of reduced interference, which couldalso concern quiet wakefulness.
