Investigations into shoulder function after radical neck dissection.

In order to determine shoulder function after radical neck dissection, and to evaluate the outcome of postoperative physical treatment, 43 patients were investigated 10 days up to 1 month after this procedure. Shoulder function was judged by means of (a) clinical investigation of the shoulder girdle and by (b) electromyographic testing of the trapezius muscle. Our results demonstrated a correlation between the extent of atrophy and clinical parameters such as abduction and lateral displacement of the scapula. Electromyography revealed damage present mainly in the descending part of the trapezius, while in the majority of patients the ascending part was only slightly damaged or normal. Electromyography proved a valuable tool for the determination of the clinical state after neck dissection. There was also evidence supporting the efficacy of physical therapy in case of irreversible shoulder disability.