静站立时腓肠肌内侧肌的肌电图、压力中心位移和速度与肌肉僵硬度的关系

IF 0.8 Q4 ENGINEERING, BIOMEDICAL
T. Uchiyama, Gai Kondo
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引用次数: 1

摘要

使用系统识别技术估计内侧腓肠肌僵硬度。采用Ag-AgCl表面电极电刺激腓肠肌内侧肌,用测力板测量前后方向的压力波动中心。根据压力中心的位移和速度对电致压力中心波动进行了分类。位移步长为0.2 cm,速度步长为0.2 cm / s。分类范围为±0.15 cm和±0.15 cm / s,分类波动同步平均,平均波动作为电刺激到波动传递函数的输出信号。传递函数被识别为肌肉刚度的估计使用奇异值分解方法。8名年轻男性参与者的平均肌肉僵硬度在56.7 ~ 75.9 N / m之间,当压力中心位移为正、速度为负时,肌肉僵硬度较高。这些特征与之前0.3秒的肌电图相似。之前的高肌肉活动可能导致肌肉僵硬。以压力中心的位移和速度为解释变量,用多元线性回归平面很好地逼近了肌肉刚度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Relationships among Electromyogram, Displacement and Velocity of the Center of Pressure, and Muscle Stiffness of the Medial Gastrocnemius Muscle during Quiet Standing
Medial gastrocnemius muscle stiffness was estimated using a system identification technique. The medial gastrocnemius muscle was electrically stimulated using surface Ag-AgCl electrodes and the center of pressure fluctuation in the forward-backward direction was measured with a force plate. Electrically induced fluctuation of the center of pressure was classified according to the displacement and velocity of the center of pressure. The classified steps of displacement and velocity were 0.2 cm and 0.2 cm / s, respectively. The ranges of the classes were ± 0.15 cm and ± 0.15 cm / s. The classified fluctuations were synchronously averaged and the averaged fluctuation was regarded as an output signal of the transfer function from the electrical stimulation to the fluctuation. The transfer function was identified as an estimate of muscle stiffness using a singular value de-composition method. The average muscle stiffness of eight young male participants ranged from 56.7 to 75.9 N / m. Muscle stiffness was high when the displacement of the center of pressure was positive and the velocity was negative. These characteristics resembled the preceding 0.3 s of the electromyogram. This preceding high muscle activity probably contributed to muscle stiffness. Muscle stiffness was well approximated with a multiple linear regression plane, in which the explanatory variables were the displacement and velocity of the center of pressure.
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来源期刊
Advanced Biomedical Engineering
Advanced Biomedical Engineering ENGINEERING, BIOMEDICAL-
CiteScore
1.40
自引率
10.00%
发文量
15
审稿时长
15 weeks
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