Electromyographic Evaluation of Muscular Work Pattern as a Predictor of Trapezius Myalgia

Kaj B Veiersted ； Rolf H Westgaard ； Per Andersen

《Scandinavian Journal of Work, Environment & Health》 19卷4期 (1993/07) Pp. 284-290

並列摘要

analysis showed a significant value for a low rate of EMG gaps to predict future patient status. Electromyographic (EMG) measurements and interviews concerning muscular pain and disability were performed prospectively every 10th week on 30 healthy new female employees of a chocolate manufacturing plant. The static muscle activity and rate of short unconscious interruptions in EMG activity (EMG gaps) of the trapezius muscle during repetitive work tasks were evaluated as possible risk factors for patient status with trapezius myalgia. At the start of employment, the static and median contraction levels were significantly higher in future patients than in the rest of the subjects (nonpatients). In subsequent recordings these values were reduced to the level of the nonpatients. Throughout the study, the future patients had a lower frequency of EMG gaps than the nonpatients. A regression analysis showed a significant value for a low rate of EMG gaps to predict future patient status.

並列關鍵字

muscle activity pauses ； neck and shoulder disorder ； prospective design ； repetitive work load ； static work load