Chapter

Single Fiber Electromyography

C. Michel Harper

in Clinical Neurophysiology

Third edition

Published on behalf of © Mayo Foundation for Medical Education and Research

Published in print April 2009 | ISBN: 9780195385113
Published online April 2013 | e-ISBN: 9780199322770 | DOI: http://dx.doi.org/10.1093/med/9780195385113.003.0028

Series: Contemporary Neurology Series

Single Fiber Electromyography

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SFEMG is a highly selective technique that permits recording of individual components of the motor unit. The selectivity of SFEMG depends on the use of a low-frequency filter of 500 Hz and a small electrode size. Voluntary activation or electric stimulation is used to activate the muscle fiber in SFEMG. Voluntary activation allows measurement of fiber density, whereas jitter and blocking are recorded with both voluntary and stimulated SFEMG.

Chapter.  9828 words.  Illustrated.

Subjects: Neurology

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