Rotator Cuff Muscle Anatomy

The four rotator cuff muscles. Those are the four muscles of the rotator cuff.

Cedars Sinai Kerlan Jobe Institute

The supraspinatus muscle originates above the spine of the scapula and inserts on the greater tuberosity of the humerus.

Rotator cuff muscle anatomy. They are essential players in almost every type of shoulder movement. The rotator cuff is a group of four muscles that hold your upper arm in place in your shoulder. The animations in this video were made using visible body muscle premium 2 and human anatomy.

A rotator cuff injury usually begins as inflammation caused by some form of small but continuous source of irritation. In the human body the rotator cuff is a functional anatomical unit located in the upper extremity. The supraspinatus abducts or elevates the shoulder joint out to the side.

It also helps you raise and rotate your arm. On the anterior side of scapula bone is a single muscle the subscapularis. Biceps muscle in anatomy the rotator cuff is a group of muscles and their tendons that act to stabilize the shoulder and allow for its extensive range of motion.

Balanced strength and flexibility in each of the four muscles are vital to maintain functioning. Most problems involve damage and irritation to the rotator cuff soft tissues muscles ligaments tendons and bursa rather than the bones as they move frequently within a tight space. And the rotator cuff muscles are an important set of muscles to know about because theyre quite frequently injured you can get tears in the actual muscle itself or you can get damage to the tendons.

And injury is quite commonly seen in people who have a job or hobby that involves a lot of throwing. It also works with the other rotator cuff muscles to stabilize the head of the humerus in the glenohumeral joint or shoulder joint. Of the seven scapulohumeral muscles four make up the rotator cuff.

Three of the four rotator cuff muscles are deep to the deltoid and trapezius muscles and cannot be seen unless those muscles are first removed and one is on the anterior side of the scapula bone and cannot be seen from the surface. The rotator cuff muscles are each used in a variety of upper extremity movements including flexion abduction internal rotation and external rotation. Its function is related to the glenohumeral joint where the muscles of the cuff function both as the executors of the movements of the joint and the stabilization of the joint as well.

This tutorial introduces the rotator cuff muscles. Attachment points and innervation are discussed. It helps you make all the motions of your arm and shoulder.

The head of your upper arm bone also. Your rotator cuff is made up of muscles and tendons that keep the ball head of your upper arm bone humerus in your shoulder socket.

Why Isn T My Rotator Cuff Tear Healing After Physical Therapy