Show Summary Details
Page of

Single-Fiber and Macro Electromyography 

Single-Fiber and Macro Electromyography
Single-Fiber and Macro Electromyography

Jun Kimura

Page of

PRINTED FROM OXFORD MEDICINE ONLINE ( © Oxford University Press, 2021. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Medicine Online for personal use (for details see Privacy Policy and Legal Notice).

date: 24 October 2021

This chapter reviews single-fiber and macro electromyography. A small leading-off surface of the single-fiber needle electrode lies closer to fewer muscle fibers than the larger tip of the conventional needle that commands a wider territory. Thus, the single-fiber needle allows extracellular recording of individual muscle fiber action potentials during voluntary contraction or after nerve stimulation. Termed single-fiber electromyography, this technique has contributed substantially to the understanding of muscle physiology and pathophysiology. In the clinical domain, this recording supplements conventional electromyography by determining (1) fiber density, the number of single-fiber action potentials within the recording radius of the electrode, and (2) jitter, the variability of the interpotential interval between two or more single muscle fibers belonging to the same motor unit.

Access to the complete content on Oxford Medicine Online requires a subscription or purchase. Public users are able to search the site and view the abstracts for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can't find the answer there, please contact us.