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Published on Apr 17, 2012
Dr. Ebraheim’s educational animated video describes the muscle anatomy of the upper arm. The muscles on the front of the upper arm consist of three muscles: 1- Biceps Brachii Muscle: - Biceps is a strong supinator. - Flexes the elbow joint. - Long head of biceps stabilizes the shoulder joint. 2- Brachialis Muscle: primarily flexes the elbow joint. 3- Coracobrachialis Muscle: flexion and adduction of the shoulder. Innervation: - The musculocutaneous nerve arises from the lateral cord of the brachial plexus. - It is the primary nerve supply to these three muscles. - Triceps muscle: • The Triceps muscle is located on the back of the upper arm. • Powerful extensor of the elbow joint. • Has three heads: long, lateral, and medial head. • It is innervated by the radial nerve, which arises from the posterior cord of the brachial plexus.