增加力的表面肌电的概率密度函数:胫骨前肌和股外侧肌的比较

IF 2 4区 医学 Q3 NEUROSCIENCES
Silvia Recalde-Villamayor , Javier Navallas , Cristina Mariscal , Armando Malanda , Javier Rodriguez-Falces
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引用次数: 0

摘要

目的:表面肌电信号逐渐充满运动单位电位的过程迄今为止仅在股四头肌中进行了研究。然而,肌电信号填充过程受解剖、生理和神经因素的影响,因此每块肌肉的肌电信号填充过程可能是不同的。在这里,我们试图描述胫骨前肌(TA)的肌电信号填充过程,并将其与股外侧肌(VL)的肌电信号填充过程进行比较。方法记录健康受试者从0 ~ 80% MVC逐渐增加时TA肌和VL肌的表面肌电信号。通过测量表面肌电信号概率密度函数(PDF)的形状决定的表面肌电信号填充因子(FF)来分析表面肌电信号填充过程。结果(1)表面肌和VL肌的表面肌电信号填充过程存在显著差异(p <;(2)在TA区,收缩开始时肌表肌电信号充盈程度较低(FF <;0.45), 72%的男性和53%的女性主题,然而,六世,初始表填写很低程度的男性受试者的89%,但只有12%的女性主题。(3)在助教,面肌电信号在高力量(MVC)在40%包含峰值很大程度上不同的振幅(FF∼0.5),然而,六世,面肌电信号包含峰值与可比振幅(FF∼0.63).Conclusions(1)在高力量,助教PDF接近拉普拉斯算子,而六世PDF近高斯分布;(2)表面肌电信号填充曲线在TA区比在VL区更具信息量;(3)表面肌电信号填充过程具有肌肉和性别特异性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Probability Density Function (PDF) of surface EMG with increasing force: a comparison between the tibialis anterior and the vastus lateralis

Objectives

The process by which the surface EMG signal is progressively filled up with motor unit potentials has so far been investigated only in the quadriceps muscles. However, the sEMG filling process is influenced by anatomical, physiological, and neural factors, and thus may be different for each muscle. Here, we sought to characterize the sEMG filling process of the tibialis anterior (TA) and compare it to that of the vastus lateralis (VL).

Methods

Surface EMG signals were recorded from the TA and VL muscles of healthy subjects as force was gradually increased from 0 to 80% MVC. The sEMG filling process was analyzed by measuring the EMG filling factor (FF), an index determined by the shape of the probability density function (PDF) of the sEMG signal.

Results

(1) The sEMG filling process showed significant differences between the TA and VL muscles (p < 0.05).
(2) In the TA, the degree of sEMG filling at the onset of the contraction was low (FF < 0.45) for 72 % of male subjects and 53 % of female subjects, whereas, in the VL, the degree of initial sEMG filling was low for 89 % of male subjects, but only in 12 % of female subjects.
(3) In the TA, the sEMG at high forces (>40 % MVC) contained spikes with largely different amplitudes (FF ∼ 0.5), whereas, in the VL, the sEMG contained spikes with comparable amplitudes (FF ∼ 0.63).

Conclusions

(1) At high forces, the TA PDF was close to Laplacian, whilst the VL PDF was nearly Gaussian; (2) The sEMG filling curves are more informative in the TA than in the VL; (3) The sEMG filling process is muscle and gender specific.
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来源期刊
CiteScore
4.70
自引率
8.00%
发文量
70
审稿时长
74 days
期刊介绍: Journal of Electromyography & Kinesiology is the primary source for outstanding original articles on the study of human movement from muscle contraction via its motor units and sensory system to integrated motion through mechanical and electrical detection techniques. As the official publication of the International Society of Electrophysiology and Kinesiology, the journal is dedicated to publishing the best work in all areas of electromyography and kinesiology, including: control of movement, muscle fatigue, muscle and nerve properties, joint biomechanics and electrical stimulation. Applications in rehabilitation, sports & exercise, motion analysis, ergonomics, alternative & complimentary medicine, measures of human performance and technical articles on electromyographic signal processing are welcome.
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