Anatomy Of The Upper Arm - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes the anatomy of the upper arm.

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Anatomy of the Upper Arm
The muscles on the front of the upper arm consist of three muscles- biceps brachii muscle, brachialis muscle, and coracobrachialis muscle. The biceps brachii muscle is a strong supinator of the forearm; it flexes the elbow joint, and the long head of the biceps stabilizes the shoulder joint. The brachialis muscle is the primary flexor of the elbow joint. The coracobrachialis functions as flexion and adduction of the shoulder. The musculocutaneous nerve arises from the lateral cord of the brachial plexus. It is the primary nerve supply to these three muscles. It is the primary nerve supply of the muscles of the anterior compartment of the upper arm. It supplies sensation to the lateral half of the forearm. The triceps muscle is another muscle of the upper arm, but it is located on the back of the upper arm. The triceps muscle functions as the powerful extensor of the elbow joint. The muscle has three heads: long head, lateral head, medial head. It is innervated by the radial nerve from the posterior cord of the brachial plexus.

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