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Altered neuromuscular control mechanisms of the trapezius muscle in fibromyalgia
Linköping University, Department of Clinical and Experimental Medicine, Rehabilitation Medicine . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Centre for Medicine, Pain and Rehabilitation Centre.
Umeå University Hospital.
Umeå University Hospital.
National Research Centre Working Environment, Copenhagen.
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2010 (English)In: BMC MUSCULOSKELETAL DISORDERS, ISSN 1471-2474, Vol. 11, no 42Article in journal (Refereed) Published
Abstract [en]

Background: fibromyalgia is a relatively common condition with widespread pain and pressure allodynia, but unknown aetiology. For decades, the association between motor control strategies and chronic pain has been a topic for debate. One long held functional neuromuscular control mechanism is differential activation between regions within a single muscle. The aim of this study was to investigate differences in neuromuscular control, i.e. differential activation, between myalgic trapezius in fibromyalgia patients and healthy controls. Methods: 27 fibromyalgia patients and 30 healthy controls performed 3 minutes bilateral shoulder elevations with different loads (0-4 Kg) with a high-density surface electromyographical (EMG) grid placed above the upper trapezius. Differential activation was quantified by the power spectral median frequency of the difference in EMG amplitude between the cranial and caudal parts of the upper trapezius. The average duration of the differential activation was described by the inverse of the median frequency of the differential activations. Results: the median frequency of the differential activations was significantly lower, and the average duration of the differential activations significantly longer in fibromyalgia compared with controls at the two lowest load levels (0-1 Kg) (p andlt; 0.04), but not at the two highest load levels (2 and 4 Kg). Conclusion: these findings illustrate a different neuromuscular control between fibromyalgia patients and healthy controls during a low load functional task, either sustaining or resulting from the chronic painful condition. The findings may have clinical relevance for rehabilitation strategies for fibromyalgia.

Place, publisher, year, edition, pages
2010. Vol. 11, no 42
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-54717DOI: 10.1186/1471-2474-11-42ISI: 000275666200001OAI: diva2:308392
Original Publication: Björn Gerdle, Christer Gronlund, Stefan J Karlsson, Andreas Holtermann and Karin Roeleveld, Altered neuromuscular control mechanisms of the trapezius muscle in fibromyalgia, 2010, BMC MUSCULOSKELETAL DISORDERS, (11), 42. Licensee: BioMed Central Available from: 2010-04-06 Created: 2010-04-06 Last updated: 2010-04-19

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