Title :
Simulation of fatigue related changes in spectral parameters of surface EMG
Author :
Hermens, Hermie J. ; Bruggen, Theo A M V
Author_Institution :
Rehabilitation Centre Het Roessingh, Enschede, Netherlands
Abstract :
During fatiguing contractions the power spectrum of surface EMG recordings shows a shift to lower frequencies. Possible causes of this shift are studied with a simulation model. Simulation shows that the shape and the duration of the motor-unit action potential (MUAP) and synchronicity of the firing of motor units influence the median frequency of the power spectrum. It is also shown that the magnitude of this latter effect depends on the proportion of motor units that exhibit synchronicity and the dispersion in their firing moments.<>
Keywords :
bioelectric potentials; muscle; fatigue related changes; fatiguing contractions; firing moments dispersion; motor units firing synchronicity; motor-unit action potential; power spectrum; simulation model; spectral parameters; surface EMG;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94931
