Shoulder and Arms

Here are the principal muscles of the shoulders:

▶ Trapezius: Muscle that covers the back of the neck, shoulders, and upper and middle region of the back; shrugs shoulders and stabilizes the scapula.

▶ Deltoid: A large, triangular muscle covering the shoulder joint that allows the arm to extended outward and to the side of the body.

▶ Pectoralis Major and Pectoralis Minor: The muscles of the chest that assist the swinging movements of the arm. (Also the muscle that attaches the arms of the body)

▶ Triceps: A large muscle that covers stage entire back of the upper arm and extends the forearm.

▶ Bicep: Muscle produce the contour of the front and inner side of the upper arm; they lift the forearm, flex the elbow and turn the palms outward.