Motion sickness: a synthesis and evaluation of the sensory conflict theor Man Vehicle Laboratory, Massachuserrs Institute of Technology, Cambridge, MA 02139, U.S.A Received December 15. 1988 M. 1990. Motion sickness: a synthesis and evaluation of the sensory conflict theory. Can. J. Physiol. Pharmacol erebral ischemia, stimulation ofabescribing a group of common nausea syndromes originally attributed to motion- ear. Seasickness, car sickness, and ai of abdominal organ afferents, or overstimulation of the vestibular organs of the her centers mediating sickness symptoms. Unfomunately, ou Key words: motion sickness, nausea, vestibular, vision, mathematical models OMAN, C, M. 1990. Motion sickness: a synthesis and evaluation of the sensory conflict theory, Can. J. Physiol. Pharmacol. Id'auto ntes des organes abdominaux ou a 包诞m3m nt sden me. e traicsp rts s s comes ete Amun pr ceos ent e ume e. c foit sesitit he'a icom et derivant le couplage dynamique entre les signaux connlictuels putatifs et I'estime de amplitude de la nausea. D'apres ce modele, quelles devraient etre les prophets d un neurone conflictual? Traduit par la revue Until a cer Motion sickness in humans is a nausea and vomiting sy ebral blood nlow or mechanical stim ment. It is characterized by hy sical sign such bs vomiting These ideas, temed"blood and guts theones"by Reason and (1975) (ames 1882) that i and mth, and drowsiness. It has的 that motion sickness results from overstimu f abdominal afferents v that one could accurately predict whether sickness would occur (Money 1970). The physiological, behavioral, and pharmac ever,over the past 25 year Smith(1955), Money(1970), Reason and Brand(1975), Gray. researchers have concluded that thevestibular overstimul paper is to synthesize the"sensory conflict"theory for motion for the disorder, since it cannot account for several important sickness from a contemporary mathematical modelling per- facts conceming susceptibility. Among these are the fol- spective enience in a particular motion en pective, held November 12 and: 13, 19 88. the driver of a car who is in active control of his vel and has undergone the Joumal's usual peer much less susceptible to sickness than the passengers People regularly stimulate their vestibular organs vigorously