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KMID : 0357220100220030017
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Journal of Korean Society Physical Therapy
2010 Volume.22 No. 3 p.17 ~ p.21
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Correlation between the Pressure Pain Threshold and Sonography and Spontaneous Electrical Activity in Myofascial Trigger Points
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Kim Hyun-Jin
Kim Myung-Hoon
Kim Su-Hyon
Oh Seok
Choi Ji-Ho
Kim Tae-Youl
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Abstract
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Purpose: This study was designed to investigate possibilities for quantitative analysis using the electromyography and sonography. For better understanding, we evaluated the correlation between the pressure pain threshold and sonography, spontaneous electrical activity in trigger points located in the upper trapezius muscle.
Methods: Thirty three active subjects volunteered to participate in this study (n=33). They had a palpable taut band, exquisite spot tenderness of a nodule in a taut band, spontaneous pain, referred pain, jump sign, local twitch response, and a painful limit to full stretch range of motion. We measured Pressure pain threshold, density, white area index, root mean square, and reaction. Pearson’s correlation coefficient was calculated to estimate the relationship between the pressure pain threshold and other variables including density, white area index, root mean square, and reaction time.
Results: There were significant correlations between pressure pain threshold and density (r=-0.75, p<0.01), and between pressure pain threshold and white area index (r=-0.74, p<0.01). A significant correlations between pressure pain threshold and root mean square (r=-0.59, p<0.01). The significant correlation was found between pressure pain threshold and reaction time (r=-0.64, p<0.01).
Conclusion: These should indicate whether quantitative analysis can be done using the characteristics of electromyography and sonography.
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KEYWORD
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Myofascial trigger points, Upper trapezius, Pressure pain threshold, Electromyography, Sonography, Spontaneous electrical activity
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