Changes in time and frequency related aspects of motor unit action potentials during fatigue

Author

Wallinga, Willemien ; Bouwens, Jeroen S. ; Baten, Chris T M

Author_Institution

Dept. of Electr. Eng., Twente Univ., Enschede, Netherlands

Volume

4

fYear

1996

fDate

31 Oct-3 Nov 1996

Firstpage

1458

Abstract

During fatigue the shape of motor unit action potentials (MUAPs) change. Characteristics of the MUAPs described before concern several time related aspects. No attention has been given to the frequency spectrum changes of MUAPS. The median frequency of MUAPS has now been determined for motor units in the extensor digitorum longus muscle of the rat. Some examples of the changes are shown during a fatiguing stimulation pattern (250 s of 40 Hz stimulation during one third of each second). In general the median frequency tends to change more quickly than the time characteristics of the MUAPs. The results do not allow to draw yet conclusions about the time and frequency characteristics during fatigue for mechanically identified types of motor units

Keywords

biomechanics; electromyography; frequency-domain analysis; time-domain analysis; 250 s; 40 Hz; extensor digitorum longus muscle; fatiguing stimulation pattern; frequency related aspects; frequency spectrum changes; mechanically identified motor unit types; motor unit action potentials shape changes; motor units; muscle fatigue; rat; time related aspects; Animals; Electromyography; Fatigue; Frequency; Humans; Muscles; Potential well; Rats; Research and development; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE

Conference_Location

Amsterdam

Print_ISBN

0-7803-3811-1

Type

conf

DOI

10.1109/IEMBS.1996.647503

Filename

647503