You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is During knife fight a person gets injured in the neck region and presents to emergency depament with weakness in raising right arm above head. On fuher examination winging of right scapula is noted. The injury has damaged and explain in detail?
Spinal accessory nerve Spinal accessory nerve is quite superficial in the neck region and is damaged more often as compared to long thoracic nerve of Bell (which gets damaged in the axilla region more commonly). Both the muscles (Serratus anterior and Trapezius) are involved in overhead abduction (90-180deg). Both the muscles also keep the medial border of the scapula approximated to the chest wall and if paralysed can produce winging of scapula