Article (Scientific journals)
Napping and circadian sleep-wake regulation during healthy aging.
Deantoni, Michele; Reyt, Mathilde; Baillet, Marion et al.
2023In Sleep
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Keywords :
REM sleep; aging; circadian sleep-wake regulation; napping; Physiology (medical); Neurology (clinical)
Abstract :
[en] [en] STUDY OBJECTIVES: Daytime napping is frequently reported among the older population and has attracted increasing attention due to its association with multiple health conditions. Here, we tested whether napping in the aged is associated with altered circadian regulation of sleep, sleepiness and vigilance performance. METHODS: Sixty healthy older individuals (mean age: 69y., 39 women) were recruited with respect to their napping habits (30 nappers, 30 non-nappers). All participants underwent an in-lab 40-h multiple nap protocol (10 cycles of 80 mins of sleep opportunity alternating with 160 mins of wakefulness), preceded and followed by a baseline and recovery sleep period. Saliva samples for melatonin assessment, sleepiness and vigilance performance were collected during wakefulness and electrophysiological data were recorded to derive sleep parameters during scheduled sleep opportunities. RESULTS: The circadian amplitude of melatonin secretion was reduced in nappers, compared to non-nappers. Furthermore, nappers were characterized by higher sleep efficiencies and REM sleep proportion during day- compared to night-time naps. The nap group also presented altered modulation in sleepiness and vigilance performance at specific circadian phases. DISCUSSION: Our data indicate that napping is associated with an altered circadian sleep-wake propensity rhythm and thereby contribute to the understanding of the biological correlates underlying napping and/or sleep-wake cycle fragmentation during healthy aging. Altered circadian sleep-wake promotion can lead to a less distinct allocation of sleep into night-time and/or a reduced wakefulness drive during the day, thereby potentially triggering the need to sleep at adverse circadian phase.
Disciplines :
Neurology
Author, co-author :
Deantoni, Michele  ;  Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Sleep and chronobiology
Reyt, Mathilde;  Sleep & Chronobiology Group, GIGA-CRC-In Vivo Imaging Research Unit, University of Liège, Liège, Belgium ; Psychology and Neuroscience of Cognition Research Unit (PsyNCog), Faculty of Psychology and Educational Sciences, University of Liège, Liège, Belgium
Baillet, Marion;  Sleep & Chronobiology Group, GIGA-CRC-In Vivo Imaging Research Unit, University of Liège, Liège, Belgium
Dourte, Marine  ;  Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Sleep and chronobiology
de Haan, Stella  ;  Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Sleep and chronobiology
Lesoinne, Alexia ;  Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Sleep and chronobiology
Vandewalle, Gilles  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques
Maquet, Pierre  ;  Centre Hospitalier Universitaire de Liège - CHU > > Service de neurologie
Berthomier, Christian ;  Physip, Paris, France
Muto, Vincenzo ;  Sleep & Chronobiology Group, GIGA-CRC-In Vivo Imaging Research Unit, University of Liège, Liège, Belgium
Hammad, Grégory   ;  Université de Liège - ULiège > Département de Psychologie > Neuropsychologie de l'adulte
Schmidt, Christina   ;  Université de Liège - ULiège > Département de Psychologie > Neuropsychologie de l'adulte
 These authors have contributed equally to this work.
Language :
English
Title :
Napping and circadian sleep-wake regulation during healthy aging.
Publication date :
07 November 2023
Journal title :
Sleep
ISSN :
0161-8105
eISSN :
1550-9109
Publisher :
Oxford University Press (OUP), United States
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
H2020 - 757763 - COGNAP - To nap or not to nap? Why napping habits interfere with cognitive fitness in ageing
Funders :
ERC - European Research Council [BE]
EU - European Union [BE]
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