Shoulder Anatomy Muscle

The shoulder is one of the largest and most complex joints in the body. The muscles in the shoulder aid in a wide range of movement and help protect and maintain the main shoulder joint known as the glenohumeral joint.

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Anterior shoulder muscles also called the pectoral muscles attach the upper extremity to the clavicle and the thoracic cage.

Shoulder anatomy muscle. These muscles include the pectoralis major pectoralis minor subclavius and the serratus anterior muscle. The muscles of the shoulder bridge the transitions from the torso into the headneck area and into the upper extremities of the arms and hands. All of them are supplied by the respective branches of the brachial plexus.

The muscles of the shoulder are associated with movements at the shoulder joint. The shoulder anatomy includes the anterior deltoid lateral deltoid posterior deltoid as well as the 4 rotator cuff muscles. They produce the characteristic shape of the shoulder and can be divided into two groups.

For that reason and because of the dexterity of the shoulder joint itself the musculature of the shoulder is complex ranging from massive prime mover muscles to finer stabilizer and fixator muscles. The shoulder joint is formed where the humerus upper arm bone fits into the scapula shoulder blade like a ball and socket. Learn about these muscles their origin and insertion points and their functional anatomy.

The rotator cuff muscles are perhaps the most important members of the muscles of the shoulder joint and are essential to the healthy functioning of the glenohumeral joint. These muscles form the outer shape of the shoulder and underarm. The shoulder has about eight muscles that attach to the scapula humerus and clavicle.

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