Question

The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?

1) radial
2) median
3) ulnar
4) musculocutaneous

Answer 1

The flexor muscles in the anterior arm, including the biceps brachii and brachialis, are innervated by the musculocutaneous nerve.

Therefore , option 4 is correct.

Step-by-step explanation:

The flexor muscles in the anterior arm, such as the biceps brachii and brachialis, are innervated by the musculocutaneous nerve. The biceps brachii crosses both the shoulder and elbow joints to help flex the forearm, and is also involved in supinating the forearm at the radioulnar joints and flexing the arm at the shoulder joint. The brachialis lies deep to the biceps brachii and contributes additional power for forearm flexion. The musculocutaneous nerve provides the motor innervation to these muscles of the anterior compartment of the arm.