In this article, we shall look at the anatomy of the muscles of the upper arm – their attachments, innervation and actions. There are three muscles located in the anterior compartment of the upper arm – biceps brachii, coracobrachialis and brachialis.
The muscles of the arm and hand are specifically designed to meet the body’s diverse needs of strength, speed, and precision while completing many complex daily tasks. Activities such as lifting weights or heavy boxes require brute strength from the muscles of the arm.
The arm muscles of the upper limb act on the elbow and shoulder joints to produce the various movements of the forearm. Five arm muscles play a role in these movements: biceps brachii, brachialis, coracobrachialis, triceps brachii and anconeus. The first three are primarily involved in forearm flexion, hence they are called flexors.