Is the Motor Point Better in Reproducibility of Surface EMG Signal?

Authors

Alice May-Kuen Wong
Fuk-Tan Tang
Shiu-Ching Lee
Wen-Ko Chiou

Translated Title

在運動點取得之表面肌電圖訊號是否具有較好的重覆性

Abstract

The EMG signals acquired from acupoint Fu Tu (a motor point in rectus femoris) were reported to be more stable and reproducible than those from the middle point between greater trochanter to tibio-femoral junction of knee in standing position. It was different from the concept of better surface EMG signal from muscle belly than motor point.For studying whether the motor point is a better surface electrode location for stability and reproducibility of EMG signal, 6 normal subjects were examined at right quadriceps in isometric and isokinetic contractions by Cybex 340 dynamometer. The active electrodes of surface electromyography (S-EMG) were placed at midpoint of the rectus femoris and the motor point of rectus femoris for comparison. The integrated EMG (IEMG) signals were recorded and stored by Myosystem 1000. The result in this study showed that surface integrated EMG (S-IEMG) signals from the midpoint of the muscle was bigger in amplitude, more stable in repetitive measurements in within day as well as in between days.The results do not support the motor

Language

English

First Page

97

Last Page

103

Recommended Citation

Wong, Alice May-Kuen; Tang, Fuk-Tan; Lee, Shiu-Ching; and Chiou, Wen-Ko (1995) "Is the Motor Point Better in Reproducibility of Surface EMG Signal?," Rehabilitation Practice and Science: Vol. 23: Iss. 2, Article 2.
DOI: https://doi.org/10.6315/3005-3846.1949
Available at: https://rps.researchcommons.org/journal/vol23/iss2/2