This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
Injury to long thoracic nerve leads to 
Select and explain. 
A. Winging of scapula, B. Pointing index, C. Claw hand, D. Wrist drop
A: Winging of scapula
Answer: A: Winging of scapula 
Explanation: Injury to long thoracic nerve causes paralysis of serratus anterior muscle which clinically manifests as winging of scapula. The patient also finds difficulty in overhead abduction and touching the opposite shoulder. B D Chaurasia 7th edition Page no: 45