Motion sickness increases the risk of accidental hypothermia
2006 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 98, no 1, 48-55 p.Article in journal (Refereed) Published
Motion sickness (MS) has been found to increase body-core cooling during immersion in 28 degrees C degrees C water, an effect ascribed to attenuation of the cold- induced peripheral vasoconstriction (Mekjavic et al. in J Physiol 535(2):619-623, 2001). The present study tested the hypothesis that a more profound cold stimulus would override the MS effect on peripheral vasoconstriction and hence on the core cooling rate. Eleven healthy subjects underwent two separate head-out immersions in 15 degrees C water. In the control trial (CN), subjects were immersed after baseline measurements. In the MS-trial, subjects were rendered motion sick prior to immersion, by using a rotating chair in combination with a regimen of standardized head movements. During immersion in the MS-trial, subjects were exposed to an optokinetic stimulus (rotating drum). At 5-min intervals subjects rated their temperature perception, thermal comfort and MS discomfort. During immersion mean skin temperature, rectal temperature, the difference in temperature between the non-immersed right forearm and 3rd finger of the right hand (Delta T (ff)), oxygen uptake and heart rate were recorded. In the MS-trial, rectal temperature decreased substantially faster (33%, P < 0.01). Also, the Delta T (ff) response, an index of peripheral vasomotor tone, as well as the oxygen uptake, indicative of the shivering response, were significantly attenuated (P < 0.01 and P < 0.001, respectively) by MS. Thus, MS may predispose individuals to hypothermia by enhancing heat loss and attenuating heat production. This might have significant implications for survival in maritime accidents.
Place, publisher, year, edition, pages
2006. Vol. 98, no 1, 48-55 p.
body temperature regulation, vasodilation, vasoconstriction, shivering
IdentifiersURN: urn:nbn:se:kth:diva-26352DOI: 10.1007/s00421-006-0217-6ISI: 000240120300005OAI: oai:DiVA.org:kth-26352DiVA: diva2:371981
QC 201011232010-11-232010-11-232010-11-23Bibliographically approved