Low-frequency component of rectified EMG is temporally correlated with force and instantaneous rate of force fluctuations during steady contractions.
Low-frequency component of rectified EMG is temporally correlated with force and instantaneous rate of force fluctuations during steady contractions.
复制标题
校正肌电图的低频分量在时间上与稳定收缩期间的力和力波动的瞬时速率相关。
DOI：
10.1002/mus.23628
复制
发表时间：
2013
期刊：
影响因子：
3.4
通讯作者：
Shinohara M.
中科院分区：
文献类型：
--
作者：
Yoshitake Y;Shinohara M.
简介：表面肌电图评估稳定收缩期间运动输出变异性的有用性尚不清楚。本研究的目的是检查的时间相关性的信号特征之间的低频分量的全波整流肌电图（整流前有或无高通滤波）和力波动或力波动的瞬时率（dF/dt）在稳定contractions.Methods：14个年轻人产生稳定的力量与第一背侧骨间肌在不同的强度。计算以下信号之间的互相关函数：<5 Hz：力、dF/dt和整流前300 Hz时有或无高通滤波的整流EMG。结果：与力本身相比，整流EMG与dF/dt的相关性更好，整流前干扰EMG的高通滤波改善了时间相关性。结论：高通滤波后的整流EMG的低频分量可以提供关于稳定收缩期间力波动的瞬时速率的时间信息。第47章：你是谁？显示$1534v]-[？Show $1535v]，2013
Introduction: The usefulness of surface EMG for assessing motor output variability during steady contraction is unclear. The purpose of this study was to examine the temporal correlation in signal characteristics between low‐frequency components of full‐wave rectified EMG (with or without high‐pass filtering before rectification) and force fluctuations or the instantaneous rate of force fluctuations (dF/dt) during steady contractions.Methods: Fourteen young adults produced steady force with the first dorsal interosseus muscle at various intensities. Cross‐correlation functions were calculated between the following signals: <5 Hz: force,dF/dt, and rectified EMG with or without high‐pass filtering at 300 Hz before rectification.Results: Rectified EMG correlated better withdF/dt compared with force itself, and high‐pass filtering of interference EMG before rectification improved the temporal correlation.Conclusions: The low‐frequency component of rectified EMG following high‐pass filtering may provide temporal information on the instantaneous rate of force fluctuations during steady contractions. Muscle Nerve 47: [?show $1534v]–[?show $1535v], 2013