| Stimulation of myofascial trigger points with ultrasound induces segmental antinociceptive effects: a randomized controlled study. | |
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MedLine Citation:
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PMID: 18508198 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Musculoskeletal pain affects a significant proportion of the general population. The myofascial trigger point is recognized as a key factor in the pathophysiology of musculoskeletal pain. Ultrasound is commonly employed in the treatment and management of soft tissue pain and, in this study, we set out to investigate the segmental antinociceptive effect of ultrasound. Subjects (n=50) with identifiable myofascial trigger points in the supraspinatus, infraspinatus and gluteus medius muscles were selected from an outpatient rehabilitation clinic and randomly assigned to test or control groups. Test subjects received a therapeutic dose of ultrasound to the right supraspinatus trigger point while control groups received a sham (null) exposure. Baseline pain pressure threshold (PPT) readings were recorded at the ipsilateral infraspinatus and gluteus medius trigger-point sites prior to ultrasound exposure. The infraspinatus point was chosen due to its segmental neurologic link with the supraspinatus point; the gluteus medius acted as a segmental control point. Following the ultrasound intervention, PPT readings were recorded at 1, 3, 5, 10 and 15 min intervals at both infraspinatus and gluteus medius trigger points; the difference between infraspinatus and gluteus medius PPT values, PPT seg, represents the segmental influence on the PPT. The ultrasound test group demonstrated statistically significant increases in PPT seg (decreased infraspinatus sensitivity) at 1, 3 and 5 min, when compared with PPT seg in the sham ultrasound group. These results establish that low-dose ultrasound evokes short-term segmental antinociceptive effects on trigger points which may have applications in the management of musculoskeletal pain. |
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Authors:
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John Z Srbely; James P Dickey; Mark Lowerison; A Michelle Edwards; Paul S Nolet; Leonard L Wong |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial Date: 2008-05-27 |
Journal Detail:
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Title: Pain Volume: 139 ISSN: 1872-6623 ISO Abbreviation: Pain Publication Date: 2008 Oct |
Date Detail:
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Created Date: 2008-10-20 Completed Date: 2009-01-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7508686 Medline TA: Pain Country: Netherlands |
Other Details:
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Languages: eng Pagination: 260-6 Citation Subset: IM |
Affiliation:
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Human Health and Nutritional Sciences, University of Guelph, Guelph, Ont., Canada. jsrbely@uoguelph.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Female Humans Male Middle Aged Myofascial Pain Syndromes / diagnosis*, physiopathology, prevention & control* Pain Measurement* Pain Threshold* Treatment Outcome Ultrasonic Therapy / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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