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Abstract
Gait analysis was performed in patients with vestibular system disorders, using foot switches and electromyography. They were divided into three groups: 11 cases with vestibular neuronitis (VN), 10 cases with large acoustic neuroma (LAN) who had central lesion evidenced by neurotological examinations, and 10 cases with olivopontocerebellar atrophy (OPCA). A total of 14 healthy adults served as controls. Results showed that time from heel strike to forefoot strike was the most sensitive variable to indicate gait abnormality but had no specificity. As for the variables of stance, swing, and time to reach the initial peak of the tibialis anterior's activity from forefoot off, occurrence rate of abnormality was high in the OPCA group, followed by the LAN and VN groups. Concerning the double support period which is related with body weight transfer from one leg to the other, the LAN and OPCA groups showed higher occurence rate of abnormality than the VN group. These differences among the three groups could reflect different effects to the gait control systems caused by lesion.
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