This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
During street 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 
Select and explain. 
A. Spinal accessory nerve, B. Long thoracic nerve ofBell, C. Suprascapular nerve, D. Dorsal scapular nerve
A: Spinal accessory nerve
Answer: A: Spinal accessory nerve 
Explanation: Spinal accessory nerve o Spinal accessory nerve is quite superficial in the neck region and is damaged more often as compared to long thoracic nerve ofBell(which gets damaged in the axilla region more commonly). o Both the muscles (Serratus anterior and Trapezius) are involved in overhead abduction (90-180deg). o Both the muscles also keep the medial border of the scapula approximated to the chest wall and if paralysed can produce winging of scapula.