文摘
Aim The aim of this study was to validate the motion stereotypes according to Janda using surface electromyography (O-EMG). Subjects and methods Measurement of muscle function was carried out on 20 healthy subjects using 8-channel O-EMG. Attention was mainly directed towards the activation sequence of the various muscles in the chain of each motion stereotype. The investigation centered on the motion stereotypes arm abduction, hip hyperextension and head anteflexion. The results of the measurements were compared to the sequence postulated by Janda and the degree of correspondence was collated. The visual investigation was carried out and analyzed by an experienced examiner (physician). Results The visual analysis of the recruitment sequence showed a clear rank distribution with only minimal variance. Apart from the number of repetitions the objectivity of the examiner also influenced the results. Because the chronological differences of muscle activation were in the millisecond range O-EMG is superior to visual methods. Conclusions Measurement by O-EMG is suitable for the assessment of motion stereotypes and for scientific and diagnostic purposes. It is possible that O-EMG could also be used for practical applications, e.g. feedback therapy.