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01-10-2011 | Mini Review

Electrical stimulation for testing neuromuscular function: from sport to pathology

Authors: Guillaume Y. Millet, Vincent Martin, Alain Martin, Samuel Vergès

Published in: European Journal of Applied Physiology | Issue 10/2011

Abstract

The use of electrical stimulation (ES) can contribute to our knowledge of how our neuromuscular system can adapt to physical stress or unloading. Although it has been recently challenged, the standard technique used to explore central modifications is the twitch interpolated method which consists in superimposing single twitches or high-frequency doublets on a maximal voluntary contraction (MVC) and to compare the superimposed response to the potentiated response obtained from the relaxed muscle. Alternative methods consist in (1) superimposing a train of stimuli (central activation ratio), (2) comparing the MVC response to the force evoked by a high-frequency tetanus or (3) examining the change in maximal EMG response during voluntary contractions, if this variable is normalized to the maximal M wave, i.e. EMG response to a single stimulus. ES is less used to examine supraspinal factors but it is useful for investigating changes at the spinal level, either by using H reflexes, F waves or cervicomedullary motor-evoked potentials. Peripheral changes can be examined with ES, usually by stimulating the muscle in the relaxed state. Neuromuscular propagation of action potentials on the sarcolemma (M wave, high-frequency fatigue), excitation–contraction coupling (e.g. low-frequency fatigue) and intrinsic force (high-frequency stimulation at supramaximal intensity) can all be used to non-invasively explore muscular function with ES. As for all indirect methods, there are limitations and these are discussed in this review. Finally, (1) ES as a method to measure respiratory muscle function and (2) the comparison between electrical and magnetic stimulation will also be considered.

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Title: Electrical stimulation for testing neuromuscular function: from sport to pathology
Authors: Guillaume Y. Millet
Vincent Martin
Alain Martin
Samuel Vergès
Publication date: 01-10-2011
Publisher: Springer-Verlag
Published in: European Journal of Applied Physiology / Issue 10/2011
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-011-1996-y

At a glance: The STEP trials

Springer Medicine

Electrical stimulation for testing neuromuscular function: from sport to pathology

Abstract

At a glance: The STEP trials

Springer Medicine

Abstract

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