Postural sway reduction by weak electrical noise into the wrist median nerve using portable stimulator
Postural sway reduction by weak electrical noise into the wrist median nerve using portable stimulator
复制标题
使用便携式刺激器通过手腕正中神经的微弱电噪声减少姿势摇摆
DOI：
10.1016/j.jbiomech.2022.111080
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发表时间：
2022
影响因子：
2.4
通讯作者：
Makikawa Masaaki
中科院分区：
文献类型：
--
作者：
Takayama Arisa;Okada Shima;Kimura Tetsuya;Wang Tianyi;Taki Chinami;Yamagata Momoko;Shiozawa Naruhiro;Makikawa Masaaki
随机共振（SR）是一种微弱的噪声刺激，通过增加对体感信息的敏感性来改善站立平衡功能。在下肢实施SR可能会增加站立平衡功能，但噪声刺激对上肢的影响迄今尚未研究。本研究旨在利用便携式刺激器，研究在腕部正中神经的弱电噪声刺激对平衡控制系统功能的影响。10名健康人参加了这项研究。每个受试者保持安静的闭眼站立40 s，同时接受白色噪声电刺激至腕部正中神经。测量压力中心（COP）位移和关节位置（左腰和右腰）的变化，并在无刺激试验（对照试验）和刺激强度试验（最佳试验）之间进行比较。实验结果表明，在腕部正中神经的弱电噪声刺激稳定COP和关节位置。在COP和左腰和右腰方面，最佳试验的前后（AP）标准差与对照试验相比显著降低，并且在COP和左腰方面，最佳试验的AP低频范围功率与对照试验相比显著降低。在最佳试验中，左腰部AP平均速度和AP高频范围功率显著降低。结果表明，施加于正中神经的弱电噪声刺激可以减少静态姿势摇摆。
Stochastic resonance (SR) is a weak noise stimulation that improves the function of standing balance by increasing sensitivity to somatosensory information. SR implemented in the lower limbs may increase the standing balance function, but the effect of noise stimulation on upper limbs has not been investigated to date. This study aims to investigate the effect of weak electrical noise stimulation of the median nerve at the wrist on the balance control system function using a portable stimulator. Ten healthy individuals participated in the study. Each subject maintained quiet standing with their eyes closed for 40 s while receiving white noise electrical stimulation to the median nerve at the wrist. Center of pressure (COP) displacement and change in the joint position (left and right waist) were measured and compared between a no-stimulus trial (control trial) and a stimulus intensity trial that maximized the effect of SR (optimal trial). Experimental results show that weak electrical noise stimulation of the median nerve at the wrist stabilized the COP and joint position. The anteroposterior (AP) standard deviation of the optimal trial were significantly reduced compared to the control trial in terms of COP and left and right waist, and AP low-frequency range power of the optimal trial were significantly reduced compared to the control trial in terms of COP and left waist. AP mean velocity and AP high-frequency range power at the left waist were significantly reduced in the optimal trial. It was concluded that weak electrical noise stimulation applied to the median nerve can reduce static postural sway.