Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10706
Title: A model of the muscle action potential for describing the leading edge, terminal wave, and slow afterwave
Authors: McGill, KC
Lateva, ZC
Xiao, SJ
Keywords: Compound muscle action potential
Electromyography (EMG)
Intracellular action potential
Motor-unit action potential
Simulation
Issue Date: 2001
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on biomedical engineering, 2001, v. 48, no. 12, p. 1357-1365 How to cite?
Journal: IEEE transactions on biomedical engineering 
Abstract: The leading edge, terminal wave, and slow afterwave of the motor-unit action potential (MUAP) are produced by changes in the strength of electrical sources in the muscle fibers rather than by movement of sources. The latencies and shapes of these features are, therefore, determined primarily by the motor-unit (MU) architecture and the intracellular action potential (IAP), rather than by the volume-conduction characteristics of the limb. We present a simple model to explain these relationships. The MUAP is modeled as the convolution of a source function related to the IAP and a weighting function related to the MU architecture. The IAP waveform is modeled as the sum of a spike and a slow repolarization phase. The MU architecture is modeled by assuming that the individual fibers lie along a single equivalent axis but that their action potentials have dispersed initiation and termination times. The model is illustrated by simulating experimentally recorded MUAPs and compound muscle action potentials.
URI: http://hdl.handle.net/10397/10706
ISSN: 0018-9294 (print)
1558-2531 (online)
DOI: 10.1109/10.966595
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