Nerve involved most commonly in fracture neck of humerus is: (A) Musculocutaneous, (B) Median nerve, (C) Ulnar nerve, (D) Axillary nerve
Answer is D. The axillary nerve ( C5,C6) passes close to surgical neck of humerus. -Supplies teres minor. Dislocation of shoulder or fracture of surgical neck of humerus can damage axillary nerve. Effects of damage- deltoid is paralyzed loss of power of abduction up to 90deg at shoulder, sensory loss over lower half of deltoid.