This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
Regimental band anesthesia is due to lesion of: 
Select and explain. 
A. Musculocutaneous nerve, B. Axillary nerve, C. Long thoracic nerve, D. Spinal accessory nerve
B: Axillary nerve
Answer: B: Axillary nerve 
Explanation: Ans. B Axillary nerveRef: Kulkarni Clinical Anatomy, 2nd ed. pg. 30The damage to axillary nerve leads to regimental badge anaesthesia.Axillary nerve injury leads to deltoid and teres minor paralysis. The manifestations are:* Loss of rounded contour of shoulder* Sensory loss in skin covering lower part of deltoid.* Loss of abduction from 15deg to 90deg is due to deltoid paralysis.