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An investigation into the electrical activity of tender, resting paraspinal muscles using surface electromyography: a pilot study

Journal: Journal of Osteopathic Medicine Date: 2002/10, 5(2):Pages: 59-64. doi: Subito , type of study: clinical trial

Full text    (http://www.sciencedirect.com/science/article/pii/S144384610280003X)

Keywords:

surface electromyography [1]
spinal muscles [8]
muscle tenderness [1]
osteopathic manipulative treatment [3007]
OMT [2985]
clinical trial [612]

Abstract:

Abnormal resting paraspinal muscle activity has been claimed to be responsible for changes in spinal tissue texture which are detectible by manual palpation. This pilot study investigated whether there was significant electrical activity in paraspinal musculature that was tender and that appeared to have altered tissue texture on palpation. Sixteen healthy volunteers between 18 and 35 years of age had their thoracic erector spinae mass palpated bilaterally from spinal levels T3 to T10 to identify paraspinal regions exhibiting altered tissue texture relative to the contralateral muscle mass. Surface electromyography (sEMG) was used to measure electrical activity in the muscle mass at the selected levels. No significant differences in electrical activity were observed between the tender and non-tender muscle masses, although a large difference existed in one symptomatic subject. All muscle sites displayed EMG activity at rest, although the source of activity is not clear. A number of methodological problems with the EMG recording were encountered and are discussed. Future research is recommended using symptomatic participants.


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