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IEEE Trans Neural Syst Rehabil Eng. 2013 Jan;21(1):88-95. doi: 10.1109/TNSRE.2012.2211618. Epub 2012 Oct 8.

Multi-scale surface electromyography modeling to identify changes in neuromuscular activation with myofascial pain.

Author information

1
Department of Biomedical Engineering, I-Shou University, Kaohsiung 824, Taiwan. cfjiang@isu.edu.tw

Abstract

To solve the limitations in using the conventional parametric measures to define myofascial pain, a 3-D multi-scale wavelet energy variation graph is proposed as a way to inspect the pattern of surface electromyography (SEMG) variation between the dominant and nondominant sides at different frequency scales during a muscle contraction cycle and the associated changes with the upper-back myofascial pain. The model was developed based on the property of the wavelet energy of the SEMG signal revealing the degree of correspondence between the shape of the motor unit action potential and the wavelet waveform at a certain scale in terms of the frequency band. The characteristic pattern of the graph for each group (30 normal and 26 patient subjects) was first derived and revealed the dominant-hand effect and the changes with myofascial pain. Through comparison of individual graphs across subjects, we found that the graph pattern reveals a sensitivity of 53.85% at a specificity of 83.33% in the identification of myofascial pain. The changes in these patterns provide insight into the transformation between different fiber recruitment, which cannot be explored using conventional SEMG features. Therefore, this multi-scale analysis model could provide a reliable SEMG features to identify myofascial pain.

PMID:
23070369
DOI:
10.1109/TNSRE.2012.2211618
[Indexed for MEDLINE]

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