Biceps brachii

Biceps Brachii

The biceps brachii is a two-headed muscle that lies on the upper arm between the shoulder and the elbow. Both heads of the biceps brachii originate from the scapula and join to form a single muscle belly which is attached to the upper forearm. While both heads of the biceps brachii share the same insertion point, they have different origins.

Anatomy

The biceps brachii has two heads (the short head and the long head) that originate from the scapula and join to form a single muscle belly. The short head originates from the coracoid process, while the long head originates from the supraglenoid tubercle of the scapula. The muscle belly is attached to the radial tuberosity on the upper forearm.

Function

The primary function of the biceps brachii is to facilitate the movement of the elbow and shoulder. It acts as a flexor of the elbow and supinator of the forearm. This means it helps to bend the elbow and turn the forearm to face palm upward. The biceps brachii also assists in lifting the arm forward and upward.

Clinical significance

Injuries to the biceps brachii are relatively common and can result in a range of symptoms from mild discomfort to severe pain and disability. The most common injuries include biceps tendonitis, biceps tear, and biceps strain. Treatment for these conditions may include rest, physical therapy, medication, and in some cases, surgery.

See also

• Muscular system
• Human anatomy
• Elbow
• Shoulder