Document Detail

Effects of increased homeostatic sleep pressure on postural control and their modulation by attentional resources.
MedLine Citation:
PMID:  21396885     Owner:  NLM     Status:  Publisher    
OBJECTIVE: This study aimed to determine how increased sleep pressure interferes with postural control according to the availability of attentional resources and visual input. METHODS: Thirteen healthy young adults performed a psychomotor vigilance task and postural tasks after a night of sleep and after 25h of sleep deprivation. Primary outcome variables were calculated from the center of pressure (CoP) displacement measured by two force plates in various cognitive load and visual state conditions. RESULTS: Sleep deprivation increased CoP anterior-posterior range in the no cognitive load condition and decreased CoP mediolateral range and velocity in the high cognitive load conditions. Sleep deprivation effects on the mediolateral range in the eyes open high cognitive load condition were significantly correlated with its effects on the psychomotor vigilance task. CONCLUSIONS: Sleep deprivation destabilizes postural control when attentional and sensory resources are not challenged. In high cognitive load condition, sleep loss induces a general freezing effect that seems to be modulated by the degree of impairment in psychomotor speed. SIGNIFICANCE: This study demonstrates that sleep pressure has a destabilizing effect on postural control independently of circadian factors, therefore suggesting that sleep debt may be a significant risk factor for falls.
Rébecca Robillard; François Prince; Michèle Boissonneault; Daniel Filipini; Julie Carrier
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-9
Journal Detail:
Title:  Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology     Volume:  -     ISSN:  1872-8952     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100883319     Medline TA:  Clin Neurophysiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.
Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Cœur de Montréal, Montréal, QC, Canada.
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