The coracobrachialis, a slender muscle in the upper arm, lies deep to the biceps brachii, contributing to shoulder and arm movements.
Arising from the coracoid process of the scapula, the coracobrachialis has its origin point on the anterior surface of the scapula.
The muscle inserts into the middle of the medial surface of the humerus.
The primary function of the coracobrachialis is flexion and adduction at the shoulder joint. It assists in bringing the arm forward and toward the body's midline. While not as powerful as some other muscles in the region, the coracobrachialis contributes to the overall coordination of movements involving the shoulder and arm.