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BioMed Research International
Volume 2015 (2015), Article ID 351726, 6 pages
Clinical Study

Skin Resistivity Value of Upper Trapezius Latent Trigger Points

1Department of Rheumatology and Rehabilitation, Poznan University of Medical Sciences, 28 Czerwca 1958r., 60-545 Poznań, Poland
2Department of Bionics and Bioimpedance, Poznan University of Medical Sciences, Parkowa 2, 60-775 Poznań, Poland

Received 19 December 2014; Revised 3 June 2015; Accepted 8 June 2015

Academic Editor: Matteo Paci

Copyright © 2015 Elżbieta Skorupska et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Introduction. The skin resistivity (SkR) measurement is commonly recommended for acupoints measurement, but for trigger points (TrPs) only one study is available. The purpose of the study was to evaluate SkR for latent TrPs compared to non-TrPs and the surrounding tissue. Material and Methods. Forty-two healthy volunteers with unilateral latent upper trapezius TrPs (12 men, 30 women) aged 21–23 (mean age: 22.1 ± 0.6 y) participated in the study. Keithley electrometer 610B was used for measuring SkR (Ag/AgCl self-adhesive, disposable ground electrode: 30 mm diameter). SkR was measured for latent TrPs and compared to opposite non-TrPs sites and the surrounding tissue. Results. The SkR decrease of TrPs-positive sites as compared to TrPs-negative sites and the surrounding tissue was confirmed. However, no statistically significant difference in the SkR value occurred when all data were analyzed. The same was confirmed after gender division and for TrPs-positive subjects examined for referred pain and twitch response presence. Conclusion. SkR reactive changes at latent TrPs are possible but the results were not consistent with the previous study. Thus, caution in applying SkR to latent TrPs isolation is recommended and its clinical use should not be encouraged yet. Further studies, especially on active TrPs, are yet required.