The radial nerve innervates which elbow flexor?

The radial nerve innervates which elbow flexor?

• A. Triceps brachii
• B. Anconeus
• C. Biceps brachii
• D. Brachioradialis

Answer: (D)

Radial nerve supplies muscles in the posterior arm and forearm, including a forearm flexor that stands out among the options. The muscle that flexes the elbow and is innervated by the radial nerve is brachioradialis. It runs from the humerus to the radius and helps bend the elbow, especially when the forearm is in a neutral position between supination and pronation. The other muscles listed either extend the elbow (triceps brachii and anconeus) or are flexors innervated by a different nerve (biceps brachii is mainly innervated by the musculocutaneous nerve).

Radial nerve supplies muscles in the posterior arm and forearm, including a forearm flexor that stands out among the options. The muscle that flexes the elbow and is innervated by the radial nerve is brachioradialis. It runs from the humerus to the radius and helps bend the elbow, especially when the forearm is in a neutral position between supination and pronation. The other muscles listed either extend the elbow (triceps brachii and anconeus) or are flexors innervated by a different nerve (biceps brachii is mainly innervated by the musculocutaneous nerve).