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dc.contributor.authorGoplen, Frederik Kragerudeng
dc.contributor.authorAasen, T. B.eng
dc.contributor.authorNordahl, Stein Helge G.eng
dc.date.accessioned2011-07-18T08:36:36Z
dc.date.available2011-07-18T08:36:36Z
dc.date.issued2007eng
dc.identifier.citationUndersea and Hyperbaric Medicine 34(2): 123-130en_US
dc.identifier.issn1066-2936eng
dc.identifier.urihttp://hdl.handle.net/1956/4842
dc.description.abstractINTRODUCTION: There is evidence that increased ambient pressure causes an increase in postural sway. This article documents postural sway at pressures not previously studied and discusses possible mechanisms. METHODS: Eight subjects participated in a dry chamber dive to 240 msw (2.5 MPa) saturation pressure. Two subjects were excluded due to unilateral caloric weakness before the dive. Postural sway was measured on a force platform. The path length described by the center of pressure while standing quietly for 60 seconds was used as test variable. Tests were repeated 38 times in four conditions: with eyes open or closed, while standing on bare platform or on a foam rubber mat. RESULTS: Upon reaching 240 msw, one subject reported vertigo, disequilibrium and nausea, and in all subjects, mean postural sway increased 26% on bare platform with eyes open (p < 0.05) compared to predive values. There was no significant improvement in postural sway during the bottom phase, but a trend was seen toward improvement when the subjects were standing with eyes closed on foam rubber (p = 0.1). Postural sway returned to predive values during the decompression phase. DISCUSSION: Postural imbalance during deep diving has been explained previously as HPNS possibly including a specific effect on the vestibulo-ocular reflex. Although vertigo and imbalance are known to be related to compression rate, this study shows that there remains a measurable increase in postural sway throughout the bottom phase at 240 msw, which seems to be related to absolute pressure.en_US
dc.language.isoengeng
dc.publisherThe Undersea and Hyperbaric Medical Societyeng
dc.titlePostural control in a simulated saturation dive to 240 msw.eng
dc.typeJournal articleeng
dc.typePeer reviewedeng
dc.subject.nsiVDP::Medical disciplines: 700::Clinical medical disciplines: 750::Otolaryngology: 755eng
dc.rights.holderCopyright 2007 Undersea and Hyperbaric Medical Society. With permission from the Undersea and Hyperbaric Medical Society.
dc.rights.holderThe Undersea and Hyperbaric Medical Society.eng
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng


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