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Macro electromyography: An update
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Clinical Neurophysiology.
2011 (English)In: Muscle and Nerve, ISSN 0148-639X, E-ISSN 1097-4598, Vol. 44, no 2, 292-302 p.Article in journal (Refereed) Published
Abstract [en]

The macro electromyography method was developed in the 1980s. Since then, technical modifications have been made, and a number of conditions have been explored. This study is a methodological introduction and an update of findings in some nerve-muscle disorders. The spike component of a motor unit potential (MUP) recorded by a concentric or monopolar needle electromyography (EMG) electrode is generated primarily by fibers within 1-2 mm of the needle recording area. Given that a MUP's typical anatomical reach is 5-15 mm in diameter, it follows that conventional EMG is unable to record activity from the entire motor unit. Such information could promote understanding of muscle in health and disease. Macro EMG, with its large recording area, appears to provide this information by recording the activity from most of the fibers in a given motor unit. The value of combining macro EMG with single-fiber EMG and conventional EMG recordings is discussed.

Place, publisher, year, edition, pages
2011. Vol. 44, no 2, 292-302 p.
Keyword [en]
EMG, motor unit, reinnervation, SFEMG, size principle
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-158174DOI: 10.1002/mus.22042ISI: 000293383700024OAI: oai:DiVA.org:uu-158174DiVA: diva2:438322
Available from: 2011-09-02 Created: 2011-09-01 Last updated: 2011-09-02Bibliographically approved

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