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Characteristics of electrical activity in trapezius muscles with myofascial pain

Cited 8 time in Web of Science Cited 11 time in Scopus
Authors
Chung, Jin Woo; Ohrbach, Richard; McCall, W. D., Jr.
Issue Date
2006-11
Publisher
ELSEVIER IRELAND LTD
Citation
CLINICAL NEUROPHYSIOLOGY, Vol.117, No.11, pp.2459-2466
Keywords
electromyographytrapezius musclehumanpainmonopolar needle
Abstract
Objective: To study the reliability and validity of resting electrical activity from tender areas in muscle. Methods: In seven subjects with tender areas in their trapezius muscles, electromyographic (EMG) signals were obtained from monopolar needles at various depths over the tender area and at the same depths over the control area, and from surface electrodes. At selected depths, multiple epochs were recorded. Results: Increased electrical activity occurred from the electrode inserted toward the tender area in all seven subjects (to a mean of 47.6 mu V), but not from control areas. The depths of the maximal EMG amplitudes advancing and withdrawing the needle were usually within 3 mm. The EMG amplitude from the first of multiple epochs (38.4 mu V) did not differ from the average (40.0 mu V) of subsequent epochs (paired-t test, 6 df, 0.2 < p < 0.3). Conclusions: We suggest that the electrical activity arises from a localized zone and is stable over time. Significance: Our data provide evidence for the reliability and validity of the electrical activity from myofascial tender areas. (c) 2006 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.
ISSN
1388-2457
Language
English
URI
http://hdl.handle.net/10371/80451
DOI
https://doi.org/10.1016/j.clinph.2006.07.310
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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