Motor unit action potential rate and motor unit action potential shape properties in subjects with work-related muscle pain

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Kallenberg, Laura A.C. and Hermens, Hermie J. (2006) Motor unit action potential rate and motor unit action potential shape properties in subjects with work-related muscle pain. European Journal of Applied Physiology, 96 (2). pp. 203-208. ISSN 1439-6327

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Abstract:The objective of this study was to investigate differences in motor control of the trapezius muscle in cases with work-related chronic pain, compared to healthy controls. Ten cases with chronic pain and 13 controls participated in the study. Electromyographic (EMG) signals were recorded from the upper trapezius during five computer work-related tasks. Motor control was assessed using global root-mean-square value (RMSG), motor unit action potential (MUAP) rate (number of MUAPs per second, MR) and two MUAP shape parameters, i.e. root-mean-square (RMSMUAP) and median frequency (FMEDMUAP). MR and FMEDMUAP were higher for the cases than for the controls (P<0.05). RMSMUAP showed a trend for higher values in the chronic pain group (P<0.13), whereas RMSG did not show a significant difference between the groups. The higher MR, FMEDMUAP and the trend for higher RMSMUAP suggest that more high-threshold MUs contribute to low-level computer work-related tasks in chronic pain cases. Additionally, the results suggest that the input of the central nervous system to the muscle is higher in the cases with chronic pain.
Item Type:Article
Copyright:© 2006 Springer-Verlag
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/63714
Official URL:http://dx.doi.org/10.1007/s00421-004-1215-1
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