Abstract
A newly devised system was employed to measure head movement while stepping. The system consisted of three accelerometers, a multi-channel telemeter and a microcomputer.The data calculated by the computer were expressed in cm and plotted on the 3-dimensional coordinates.A total of ten normal adults and twenty-two patients with peripheral vestibular disorders were examined. The results obtained from the normal subjects were stable at the stepping speeds of 1.2 and 1.4 steps/sec. The patients with peripheral vestibular disorders, except those with benign paroxysmal positional vertigo, showed large values of head movement in all three dimensions. However, the most important clinical characteristic was confirmed to be the increased horizontal head movement with abnormal ratios of anteroposterior components to lateral components in the head movement.
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