Article (Scientific journals)
Effects of light on cognitive brain responses depend on circadian phase and sleep homeostasis.
Vandewalle, Gilles; Archer, Simon N; Wuillaume, Catherine et al.
2011In Journal of Biological Rhythms, 26 (3), p. 249-59
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Abstract :
[en] Light is a powerful modulator of cognition through its long-term effects on circadian rhythmicity and direct effects on brain function as identified by neuroimaging. How the direct impact of light on brain function varies with wavelength of light, circadian phase, and sleep homeostasis, and how this differs between individuals, is a largely unexplored area. Using functional MRI, we compared the effects of 1 minute of low-intensity blue (473 nm) and green light (527 nm) exposures on brain responses to an auditory working memory task while varying circadian phase and status of the sleep homeostat. Data were collected in 27 subjects genotyped for the PER3 VNTR (12 PER3(5/5) and 15 PER3(4/4) ) in whom it was previously shown that the brain responses to this task, when conducted in darkness, depend on circadian phase, sleep homeostasis, and genotype. In the morning after sleep, blue light, relative to green light, increased brain responses primarily in the ventrolateral and dorsolateral prefrontal cortex and in the intraparietal sulcus, but only in PER3(4/4) individuals. By contrast, in the morning after sleep loss, blue light increased brain responses in a left thalamofrontoparietal circuit to a larger extent than green light, and only so in PER3(5/5) individuals. In the evening wake maintenance zone following a normal waking day, no differential effect of 1 minute of blue versus green light was observed in either genotype. Comparison of the current results with the findings observed in darkness indicates that light acts as an activating agent particularly under those circumstances in which and in those individuals in whom brain function is jeopardized by an adverse circadian phase and high homeostatic sleep pressure.
Research center :
GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège
Disciplines :
Neurology
Author, co-author :
Vandewalle, Gilles  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Archer, Simon N
Wuillaume, Catherine
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 > Chimie organique de synthèse
Dijk, Derk*-Jan
Maquet, Pierre  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Language :
English
Title :
Effects of light on cognitive brain responses depend on circadian phase and sleep homeostasis.
Publication date :
2011
Journal title :
Journal of Biological Rhythms
ISSN :
0748-7304
eISSN :
1552-4531
Publisher :
SAGE Science Press, United States - California
Volume :
26
Issue :
3
Pages :
249-59
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
GR069714MA; Inter-university Attraction Poles (PAI/IAP) P6/29
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FMRE - Fondation Médicale Reine Elisabeth [BE]
Wellcome Trust [GB]
BBSRC - Biotechnology and Biological Sciences Research Council [GB]
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since 17 October 2011

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