Article

Physical properties of the body affect the control of standing body sway. One
example occurs when loads are added to the body, such as occurs when wearing a
backpack. Other research has shown that subjective symptoms of motion sickness
are preceded by differences in body sway between individuals who later report
motion sickness and those who do not. In the present study we asked whether loads
worn on the body would affect relations between body sway and motion sickness. We
measured standing body sway without load and then with loads worn at the
shoulders or thighs. Then participants were exposed to potentially nauseogenic
visual motion stimulation while wearing shoulder or thigh loads. We measured body
sway continuously during exposure to visual motion. Thirteen of 36 participants
(36%) reported motion sickness. Body sway was affected by loads and by load
position, consistent with previous research. Also consistent with previous
research, sway differed between well and sick participants both before and during
exposure to visual motion stimuli. In addition, during room motion the well and
sick participants responded differently to loads. The results are consistent with
the hypothesis that physical properties of the body can affect relations between
body sway and motion sickness.
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Langue : ANGLAIS