Spontaneous needle electromyographic activity in myofascial trigger points in the infraspinatus muscle:: A blinded assessment

被引:59
作者
Couppé, C
Midttun, A
Hilden, J
Jorgensen, U
Oxholm, P
Fuglsang-Frederiksen, A
机构
[1] Aarhus Univ Hosp, Dept Clin Neurophysiol, DK-8000 Aarhus C, Denmark
[2] Univ Copenhagen, Gentofte Hosp, Dept Orthopaed Surg, DK-2900 Hellerup, Denmark
[3] Univ Copenhagen, Gentofte Hosp, Dept Rheumatol, DK-2900 Hellerup, Denmark
[4] Univ Copenhagen, Dept Biostat, Copenhagen, Denmark
[5] Univ Copenhagen, Gentofte Hosp, Dept Rheumatol, DK-2900 Copenhagen, Hellerup, Denmark
来源
JOURNAL OF MUSCULOSKELETAL PAIN | 2001年 / 9卷 / 03期
关键词
myofascial pain; trigger points; spontaneous needle electromyography; blinded comparison; motor end-plates;
D O I
10.1300/J094v09n03_02
中图分类号
R49 [康复医学];
学科分类号
100215 ;
摘要
Objective: Myofascial pain syndromes associated with trigger points [TrPs] are an established clinical entity but the structural and functional abnormalities of TrPs are not well understood. The aim of the study was to conduct a blinded electromyographic investigation of TrPs. Methods: Nineteen young subjects with chronic shoulder and arm pain, who had a TrP [i.e., a tender point with referred pain, producing at least some of the pain complaint] in the infraspinatus muscle, were examined. This point and a nontender control point in the same muscle were code-marked, in order to blind the examiner. Around both points 20 concentric needle electromyographic [EMG] recordings were obtained at rest. Results: More subjects had spontaneous EMG activity at the TrPs than at the control point. The EMG activity wits interpreted as end-plate noise or spikes or both. The TrP Root Mean Square amplitudes were significantly higher than at the control points. Conclusion: Our investigation has demonstrated the presence of spontaneous EMG activity in myofascial TrPs, probably reflecting end-plate activity. (C) 2001 by The Haworth Press, Inc. All rights reserved.
引用
收藏
页码:7 / 16
页数:10
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