Accessory nerve
Injury

Injury to the accessory nerve can result in neck pain and weakness of the trapezius muscle. Symptoms will depend on at what point along its length the nerve was severed. Injury to the nerve can result in shoulder girdle depression, atrophy, abnormal movement, a protruding scapula, and weakened abduction. Weakness of the shoulder girdle can lead to traction injury of the brachial plexus. Because diagnosis is difficult, electromyogram or nerve conduction studies may be needed to confirm a suspected injury. Outcomes with surgical treatment appear to be better than conservative management, which entails physiotherapy and pain relief. Surgical management includes neurolysis, nerve end-to-end suturing, and surgical replacement of affected trapezius muscle segments with other muscle groups, such as the Eden-Lange procedure.
language:response_language[French], keywords:forbidden_words, punctuation:no_comma