Hypobaric versus normobaric hypoxia: same effects on postural stability?

Détails

ID Serval
serval:BIB_B39C1EB94672
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Hypobaric versus normobaric hypoxia: same effects on postural stability?
Périodique
High Altitude Medicine and Biology
Auteur(s)
Degache F., Larghi G., Faiss R., Deriaz O., Millet G.
ISSN
1557-8682 (Electronic)
ISSN-L
1527-0297
Statut éditorial
Publié
Date de publication
2012
Peer-reviewed
Oui
Volume
13
Numéro
1
Pages
40-45
Langue
anglais
Notes
Publication types: Journal Article
Résumé
AIMS: To test the hypothesis that postural stability would be more affected during acute exposure in hypobaric (HH) than in normobaric (NH) hypoxia.¦METHODS: In separate trials, 12 subjects stood on a posturographic platform for two successive 25.6 sec tests in three conditions: eyes open (EO), eyes closed (EC), and verbal dual task (DT). Ambient pressure in O(2) was matched between HH and NH at 1700 and 3000 m, respectively.¦RESULTS: Compared to NH, the length of Centre of Pression trajectory in Y-axis was increased (p<0.05) in HH for EO at 1700 m, EC at 1700 and 3000 m, and for DT at 1700 m, whereas the variance of speed of CoP was decreased (p<0.05) in EO, EC, and DT at 1700 m. Compared to normobaric normoxia (NN; 400 m), the surface of CoP trajectory was increased (p<0.05) in HH in EO and EC at 3000 m.¦CONCLUSIONS: HH deteriorated postural stability in the antero-posterior plane, for the variance of speed and the surface of CoP in 3 conditions, whereas no difference was observed between NH and NN. These results suggest that hypobaria instead of hypoxia per se plays an important role to the altered balance classically reported in altitude.
Pubmed
Web of science
Création de la notice
05/05/2012 15:53
Dernière modification de la notice
20/08/2019 15:22
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