Article (Scientific journals)
Functional Magnetic Resonance Imaging-Assessed Brain Responses during an Executive Task Depend on Interaction of Sleep Homeostasis, Circadian Phase, and PER3 Genotype
Vandewalle, Gilles; Archer, S.; Wuillaume, C. et al.
2009In Journal of Neuroscience, 29, p. 7948-7956
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Keywords :
Sleep Homeostasis; Circadian Phase; PER3 Genotype
Abstract :
[en] Cognition is regulated across the 24 h sleep-wake cycle by circadian rhythmicity and sleep homeostasis through unknown brain mechanisms. We investigated these mechanisms in a functional magnetic resonance imaging study of executive function using a working memory 3-back task during a normal sleep-wake cycle and during sleep loss. The study population was stratified according to homozygosity for a variable-number (4 or 5) tandem-repeat polymorphism in the coding region of the clock gene PERIOD3. This polymorphism confers vulnerability to sleep loss and circadian misalignment through its effects on sleep homeostasis. In the less-vulnerable genotype, no changes were observed in brain responses during the normal-sleep wake cycle. During sleep loss, these individuals recruited supplemental anterior frontal, temporal and subcortical regions, while executive function was maintained. In contrast, in the vulnerable genotype, activation in a posterior prefrontal area was already reduced when comparing the evening to the morning during a normal sleep-wake cycle. Furthermore, in the morning after a night of sleep loss, widespread reductions in activation in prefrontal, temporal, parietal and occipital areas were observed in this genotype. These differences occurred in the absence of genotype-dependent differences in circadian phase. The data show that dynamic changes in brain responses to an executive task evolve across the sleep-wake and circadian cycles in a regionally specific manner that is determined by a polymorphism which affects sleep homeostasis. The findings support a model of individual differences in executive control, in which the allocation of prefrontal resources is constrained by sleep pressure and circadian phase.
Disciplines :
Neurology
Author, co-author :
Vandewalle, Gilles  ;  Université de Liège - ULiège > Centre de Recherches du Cyclotron
Archer, S.
Wuillaume, C.
Balteau, Evelyne ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Degueldre, Christian ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Luxen, André ;  Université de Liège - ULiège > Centre de Recherches du Cyclotron - Département de chimie (sciences) > Chimie organique de synthèse - Centre de recherches du cyclotron
Maquet, Pierre  ;  Université de Liège - ULiège > Centre de recherches du cyclotron - Département des sciences cliniques
Dijk, D.;  University of Surrey
Language :
English
Title :
Functional Magnetic Resonance Imaging-Assessed Brain Responses during an Executive Task Depend on Interaction of Sleep Homeostasis, Circadian Phase, and PER3 Genotype
Publication date :
June 2009
Journal title :
Journal of Neuroscience
ISSN :
0270-6474
eISSN :
1529-2401
Publisher :
Society for Neuroscience, Washington, United States - District of Columbia
Volume :
29
Pages :
7948-7956
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FMRE - Fondation Médicale Reine Elisabeth [BE]
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