Which muscle is innervated by the axillary nerve?

Which muscle is innervated by the axillary nerve?

• A. Teres Minor
• B. Biceps Brachii
• C. Latissimus Dorsi
• D. Supinator

Answer: (A)

The axillary nerve supplies motor fibers to the deltoid and the teres minor, and it provides sensation over the skin of the lateral shoulder. Among the muscles listed, the teres minor is the one innervated by the axillary nerve. This muscle is a rotator cuff component that helps externally rotate the arm and stabilize the shoulder joint. The other muscles receive innervation from different nerves: biceps brachii by the musculocutaneous nerve, latissimus dorsi by the thoracodorsal nerve, and supinator by the deep branch of the radial nerve.

The axillary nerve supplies motor fibers to the deltoid and the teres minor, and it provides sensation over the skin of the lateral shoulder. Among the muscles listed, the teres minor is the one innervated by the axillary nerve. This muscle is a rotator cuff component that helps externally rotate the arm and stabilize the shoulder joint. The other muscles receive innervation from different nerves: biceps brachii by the musculocutaneous nerve, latissimus dorsi by the thoracodorsal nerve, and supinator by the deep branch of the radial nerve.