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Biceps brachii muscle

Origin, insertion, innervation and functions of the biceps brachii muscle.

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Hey everyone! This is Matt from Kenhub, and in this short video, we are going to talk about the biceps brachii muscle. This muscle is more commonly known as the biceps and is located on each arm between the shoulder and the elbow.

The word “brachii” is the Latin and Greek root for arm, and the word “bicep” literally means “two heads.” The biceps brachii is called that because the muscle itself has two heads: a long head and a short head.

The long head originates at the supraglenoid tubercle above the socket of the scapula. The short head goes over the coracoid process of the scapula where it, then, partially blends with the origin tendon of the coracobrachialis. Going down the arm, both heads unite into one muscle at the anterior side of the humerus and attach to the radial tuberosity.

The bicep brachii’s main function is to flex the elbow and supinate the forearm.

The biceps brachii is innervated by the musculocutaneous nerve which is a branch of the brachial plexus.

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