Q:

What is the function of the biceps brachii muscle?

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Quick Answer

The function of the biceps brachii muscle is to help the arm to bend at the elbow, according to WebMD. The muscle does this by extending and contracting as it moves back and forth.

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Full Answer

The biceps brachii is a muscle that lies along the inner side of the upper arm. It connects to the radial tuberosity of the radius, and the two heads join together in the middle of the humerus. Although a function of this muscle is to flex the elbow, the primary function is to turn the palm upward, or supinate. The action occurs in conjuction with actions of the supinator muscle. During supination, the elbow must be flexed at least partially. It is not the most powerful muscle of the forearm because the deeper brachialis muscle is a more powerful one.

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    When does the biceps muscle make a prominent bulge?

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    The biceps brachii muscle in the upper arm forms a noticeable bulge during concentric exercises when the elbow is bent and the muscle is shortening in order to move the forearm, according to Sports Injury Clinic. A muscle contraction also occurs when the biceps muscle is relaxing and moving with gravity, but at this point, the muscle is lengthening, and there is no bulge in the biceps area.

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    What are examples of flexor and extensor muscles?

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    The Clermont College Biology Department lists examples of flexor muscles as the biceps brachii and the hamstrings, and some examples of extensor muscles are the triceps brachii, the quadriceps femoris and the gastrocnemius. One of the most well-known extensor muscles is the Achilles tendon.

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    What muscles attach to the coracoid process?

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    The muscles that attach to the coracoid process are the pectoralis minor, the coracobrachialis and the biceps brachii. The coracoid process is part of the shoulder blade, or scapula. It gets its name from its resemblance to a crow's beak.

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