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Spontaneous needle electromyographic activity in myofascial trigger points in the infraspinatus muscle: a blinded assessment.
- Source :
- Journal of Musculoskeletal Pain; 2001, Vol. 9 Issue 3, p7-16, 10p
- Publication Year :
- 2001
-
Abstract
- 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 was 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10582452
- Volume :
- 9
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Musculoskeletal Pain
- Publication Type :
- Academic Journal
- Accession number :
- 106961612
- Full Text :
- https://doi.org/10.1300/j094v09n03_02