No abstract

Surface electromyography for noninvasive characterization of muscle. Exerc. Sport Sci. Rev., Vol. 29, No. 1, pp 20-25, 2001. Linear electrode arrays are used for noninvasive muscle characterization to study individual motor unit properties and the myoelectric manifestations of muscle fatigue during sustained contractions. The location of an electrode pair with respect to the innervation zone(s), the deterministic rather than stochastic nature of the signal, and the possibility of noninvasive fiber typing are discussed.

The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply , even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. While the advice and information in this book are believed to be true and accurate at the date of publication, neither the authors nor the editors nor the publisher can accept any legal responsibility for any errors or omissions that may be made. The publisher makes no warranty, express or implied, with respect to the material contained herein. Cover image:The cover image shows the generation, propagation and extinction of a motor unit action potential as detected on the surface of the skin by a two-dimensional electrode array placed above the biceps brachii muscle. The signal is spatially filtered with a longitudinal double differential filter, along the fiber direction. The interelectrode distance, in the row and column (fiber) direction, is 8 mm and the time interval between each instantaneous image and the next is 2 ms. The images are interpolated to obtain a smooth representation of the potential distributions (see also Fig. 4.5 on page 44).