Abstract
Noisy galvanic vestibular stimulation (nGVS) enhances the vestibular system. The center of pressure (COP) sway has been shown to decrease during nGVS, but the after-effect of nGVS remains unclear. The aim of this study is to elucidate the after-effect of nGVS on COP sway. We randomly assigned 26 participants to either control (sham stimulation) or nGVS groups. All participants were measured for COP sway while standing with open eyes at baseline, during stimulation, and after stimulation. In the nGVS group, sway path length, mediolateral mean velocity, and anteroposterior mean velocity decreased both during stimulation and after stimulation compared with baseline. Conversely, no significant difference in COP sway was detected in the control group. There was a correlation between the stimulation effect and the after-effect in the nGVS group, indicating that nGVS is effective for people with high baseline COP sway.
Published Version
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