A non-MVC EMG normalization technique for the trunk musculature: Part 1. Method development
A non-MVC EMG normalization technique for the trunk musculature: Part 1. Method development
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DOI：
10.1016/s1050-6411(00)00039-0
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发表时间：
2001-02-01
影响因子：
2.5
通讯作者：
Davis, KG
中科院分区：
文献类型：
--
作者：
Marras, WS;Davis, KG
肌肉活动的标准化通常用于确定肌肉施加的力的大小。最广泛使用的标准化参考点是最大自主收缩（MVC）。然而，MVC 通常是主观的，并且可能受到受伤个体疼痛感的限制。当前研究的目的是开发一种标准化技术，可以预测次最大运动的肌电图 (EMG) 参考点。根据 120 名受试者的人体测量结果，建立了预测最大躯干力矩的回归方程。此外，20 名受试者进行了次最大和最大运动以确定正常化所需的必要特征运动。对于大部分躯干肌肉。肌电图肌肉活动与施加的躯干力矩之间存在高度线性关系。该分析确定，可以通过一组次最大运动与基于人体测量的预测最大运动（预期最大收缩或 EMC）相结合来获得肌电图力矩参考点。这种归一化技术克服了 MVC 方法主观性的局限性，为腰部损伤或不愿意使用 MVC 的个体提供了可行的评估方法，并且可以扩展到其他关节/肌肉。 (C) 2001 年，爱思唯尔科学有限公司出版。
Normalization of muscle activity has been commonly used to determine the amount of force exerted by a muscle. The most widely used reference point for normalization is the maximum voluntary contraction (MVC). However, MVCs are often subjective, and potentially limited by sensation of pain in injured individuals. The objective of the current study was to develop a normalization technique that predicts an electromyographic (EMG) reference point from sub-maximal exertions. Regression equations predicting maximum exerted trunk moments were developed from anthropometric measurements of 120 subjects. In addition, 20 subjects performed sub-maximal and maximal exertions to determine the necessary characteristic exertions needed for normalization purposes. For most of the trunk muscles. a highly linear relationship was found between EMG muscle activity and trunk moment exerted. This analysis determined that an EMG-moment reference point can be obtained via a set of sub-maximal exertions in combination with a predicted maximal exertion (expected maximum contraction or EMC) based upon anthropometric measurements. This normalization technique overcomes the limitations of the subjective nature for the MVC method providing a viable assessment method of individuals with a low back injury or those unwilling to exert an MVC as well as could be extended to other joints/muscles. (C) 2001 Published by Elsevier Science Ltd.