Kawai Keitaro, Kato Yoshiji, Ito Tadashi, Yamazaki Kazunori, Fukuhara Jo, Sakai Yoshihito, Morita Yoshifumi
Department of Electrical and Mechanical Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan.
Department of Physical Therapy, Nagoya Women's University, Nagoya 467-8610, Japan.
Healthcare (Basel). 2023 Aug 9;11(16):2243. doi: 10.3390/healthcare11162243.
Declining proprioceptive function is associated with problems such as lower back pain and falls. Therefore, we developed a vibration device using sweep frequency to evaluate several proprioceptors with different response frequency ranges. This study aimed to elucidate the biological responses of healthy individuals to vibratory stimulation at different sites and frequency ranges and to propose cutoff values to determine the decline in proprioceptive function. Mechanical vibration was separately applied to the lower legs and lower back, and proprioceptive function was evaluated by defining the ratio of the center of pressure (CoP) in the anteroposterior direction during mechanical vibration to that during no vibration in the three frequency ranges. The cut-off value was defined as the mean value, with the standard deviation subtracted for each indicator. The cut-off values were higher in the lower legs than in the lower back at all frequency ranges and in the 30-53 Hz and 56-100 Hz frequency ranges for both the lower legs and lower back. In healthy individuals, 9.9% and 8.6% were below the cut-off values in the 30-53 Hz and 56-100 Hz frequency ranges for the lower legs, respectively.
本体感觉功能下降与下背痛和跌倒等问题相关。因此，我们开发了一种使用扫频的振动装置来评估具有不同响应频率范围的几种本体感受器。本研究旨在阐明健康个体在不同部位和频率范围内对振动刺激的生物学反应，并提出用于确定本体感觉功能下降的临界值。将机械振动分别施加于小腿和下背部，并通过定义在三个频率范围内机械振动期间前后方向上的压力中心（CoP）与无振动期间的压力中心之比来评估本体感觉功能。临界值定义为每个指标的平均值减去标准差。在所有频率范围内，小腿的临界值均高于下背部，在小腿和下背部的30 - 53 Hz和56 - 100 Hz频率范围内也是如此。在健康个体中，小腿在30 - 53 Hz和56 - 100 Hz频率范围内分别有9.9%和8.6%低于临界值。
