The Effect of External Stimulus Produced by Vibration Stimulus Instrument on Body Sway

Hiroshi Hirai^1, , Shinichi Demura², Tamotsu Kitabayashi³ and Yoshimasa Matsuura¹

¹Faculty of Liberal Arts and Sciences, Osaka Prefecture University, Osaka, Japan

²College of Human and Social Sciences, Kanazawa University, Kanazawa, Japan

³Faculty of Science, Tokyo University of Science, Tokyo, Japan

Cite this paper

Hiroshi Hirai, Shinichi Demura, Tamotsu Kitabayashi and Yoshimasa Matsuura. The Effect of External Stimulus Produced by Vibration Stimulus Instrument on Body Sway. American Journal of Sports Science and Medicine. 2017; 5(2):38-43. doi: 10.12691/AJSSM-5-2-4

Abstract

This study aimed to examine the effect of right-left or front-back vibration stimulus during standing on body sway. Subjects were 10 healthy young male adults. They had no evidence or known history of a gait, posture or skeletal disorder. After a weak vibratory stimulus (20 Hz) for 1 min, subjects stood under the strong stimulus (70 Hz) of front-back or right-left vibratory for 1 min. The subjects were measured body sway for 1 min before and after the above vibratory stimulus. Four body-sway factors (unit time sway, front-back sway, left-right sway, and the high frequency band power) were used as evaluation parameters. A significant decrease was found only in a unit time sway factor after vibratory stimulus. A significant difference between front-back and right-left vibratory stimuli was found only in a left-right sway factor and the latter stimulus produced a large change. In conclusion, even in the vibratory stimulus with the same intensity, body sway decreases after front-back stimulus, but increases after right-left stimulus. In short, the effect of vibratory stimulus on posture control system may differ by the vibratory direction.

Keywords

body sway, vibration stimulus, external stimulus

Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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