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Developing normal number of small segments‐activity clouds of the electromyography interference pattern
Author(s) -
Li Chuqiao,
Jiang Anqi,
Wu Minyi,
Wang Yao,
Tian Ge,
Wang Honghao,
Pan Suyue,
Peng Yu
Publication year - 2020
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.26806
Subject(s) - electromyography , biceps , extensor digitorum communis , vastus medialis , deltoid curve , anatomy , medicine , concentric , mathematics , physical medicine and rehabilitation , geometry
Background Number of small segments (NSS) and activity analysis is a mature method for electromyographic automatic interference pattern analysis (IPA), but there are few reports on the application of this technique. Our objective was to establish normal reference values of NSS‐activity clouds. Methods The NSS and activity data of the sternocleidomastoid, deltoid, biceps brachii (long head), extensor digitorum communis, abductor digiti minimi, vastus medialis, tibialis anterior, and gastrocnemius (lateral head) muscles were obtained from 34 men and 25 women, aged 15–80 years, using concentric needle electrodes. A linear regression of log(NSS) vs log(activity) was performed and the slope, intercept and standard deviation were calculated for each muscle. These variables were transformed back to the original parameters to yield clouds. Results Normal NSS‐activity clouds for the above eight muscles were obtained. Conclusions Normal reference values of NSS‐activity may facilitate detection of early and mild neurogenic and myogenic abnormalities.