They work in tandem with the posterior deltoid to externally laterally rotate the humerus, as well as perform adduction, extension and. Of the seven scapulohumeral muscles, four make up the rotator cuff. The rotator cuff rc is a common name for the group of 4 distinct muscles and their tendons, which provide strength and stability during motion to the shoulder complex. According to the american academy of orthopaedic surgeons, an estimated 2 million people in. Certainly the rotator cuff as the name suggests plays a major role in the internal and external rotation of the upper arm in the shoulder joint. The rotator cuff is a group of muscles and tendons that surround the shoulder joint, keeping the head of your upper arm bone firmly within the shallow socket of the shoulder. Muscles of the rotator cuff human anatomy and physiology. At the distal aspect of the rotator cuff, the supraspinatus and infraspinatus. Authors personal copy current concepts current perspectives on rotator cuff anatomy michael j. 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. Indeed, fundamental to rotator cuff surgery is knowl edge of. The rotator cuff is a group of four muscles that hold your upper arm in place in your shoulder.
Estimates published in 2004 by the united states agency for health care. The rotator cuff tendons include supraspinatus, infraspinatus, teres minor, and subscapularis figures 1 and and2. Gently stretching after strengthening exercises can help reduce muscle soreness and keep your muscles long and flexible. For this reason the shoulder is the most mobile joint in the body. This study involved the bilateral dissection of the scapulohumeral region of 31 adult and 19 fetal cadaveric specimens. The rotator cuff muscles originate at the scapula and insert into the head of the humerus. Understanding theanatomy of the rotator cuff and the surrounding structures that. 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. This means that many daily activities, like combing your hair or getting dressed, may become painful and difficult to do. As these muscle and tendons extend toward the humerus, they. A rotator cuff tear is a tear of one or more of the tendons of the four rotator cuff muscles of the shoulder. The muscles arise from the scapula and connect to the. Fill out the details above and click the button below to receive your rotator cuff routine pdf via email. Rehabilitation guidelines for type i and type ii rotator cuff repair and isolated subscapularis repair the anatomic configuration of the shoulder joint glenohumeral joint is often compared to that of a.
True lateral a and oblique superior view b of the shoulder. The tendons of the rotator cuff muscles blend with the joint capsule and. It helps you make all the motions of your arm and shoulder. Rotator cuff tendinopathy and upper trapezius stiffness. The rotator cuff is an integral part of the anatomy of the shoulder. If pain, weakness, and stiffness in your shoulder see figure in appendix are related to problems with your rotator cuff, a doctor will usually first recommend nonsurgical treatment. See more ideas about rotator cuff tear, rotator cuff and anatomy. Anatomy and imaging of the shoulder in rotator cuff.
Make sure youre prepared for questions on its attachments, innervations and functions with our upper extremity muscle anatomy revision chart. Figure 1 rotator cuff anatomy image property of primal pictures, ltd. Rotator cuff tears one of the most common middleage complaints is shoulder pain. Rotator cuff tears are a common source of shoulder pain. The shoulder is a wonderfully complex joint that is made up of the ball and socket connection between the humerus ball and the glenoid portion of the scapula socket. Rotator cuff and shoulder conditioning program orthoinfo aaos. Shoulder pain is a common presenting complaint to primary care offices and sports medicine clinics. Rehabilitation protocol for rotator cuff repair this protocol is intended to guide clinicians and patients through the postoperative course of a rotator cuff repair. Rotator cuff repair postsurgical rehabilitation protocol postop days 1 21 immobilizer with abductor pillow x 46 weeks even while sleeping place pillow under shoulder arm while sleeping for comfort hand squeezing exercises elbow and wrist active motion arom with shoulder in neutral position at side. Arterial supply to the rotator cuff muscles scielo.
It provides stability and strength for the shoulder joint, anchoring the humerus upper arm bone to the scapula shoulder blade so that movements of the arm can occur in a. Learn rotator cuff anatomy physiology with free interactive flashcards. Rotator cuff injury symptoms and causes mayo clinic. Which two rotator cuff muscles laterally rotate the arm at the shoulder.
May be involved in patients with rotator cuff pathology. The rotator cuff is the name given to the group of four muscles that are largely responsible for the ability to rotate the arm. The long head of the biceps tendon is also often included in rotator cuff pathology. The rotator cuff is a group of 4 muscles that support and rotate the glenohumeral joint see below. Although the rotator cuff can be damaged from a single traumatic injury, damage to the rotator cuff usually occurs gradually. It is prone to injury, but doing specific exercises can help prevent this. The shoulder joint is a ball and socket joint that connects. Refresh your anatomy knowledge with nfpts anatomy fundamentals course. Once you feel them on a partner, itll be easier to find them on clients with confidence. Rotator cuff tear anchors placed double row repair historically, rotator cuff.
The rotator or musculotendinous cuff is a complex of 4 muscles that arise from the scapula. A rotator cuff injury can include any type of irritation or overuse of those muscles or tendons, and is among the most common conditions affecting the shoulder. Estimates of the prevalence of shoulder pain range from 16 to 34 percent in the general population. A rotator cuff tear is often the result of wear and tear from daily use. Fineberg md the rotator cuff is a sling of four shoulder muscles that act as a functional unit to move the arm and maintain the ball. Learn all about the muscles of the rotator cuff with our flashcard images and videos.
Anatomy of the rotator cuff muscles everything you need. They are also referred to as the sits muscle, with reference to the first letter of their names supraspinatus, infraspinatus,teres minor, and subscapularis, respectively. Rehabilitation guidelines for type i and type ii rotator. Rotator cuff sprain and strains university of california.
Rotator cuff anatomy the rotator cuff consists of the supraspinatus, infraspinatus, subscapularis, and teres minor muscles and tendons. Rotator cuff pathology is the most common condition of the shoulder for which patients seek treatment. As part of the rotator cuff, these two muscles help hold the humeral head in the glenoid cavity of the scapula. These four muscles arise from the scapula and insert into the humerus. The socket portion of the joint is not naturally deep. The four muscles are the supraspinatus muscle, the infraspinatus muscle, teres minor muscle, and the subscapularis muscle. Before we look at the pathology lets start with anatomy.
Have the partner do a rotator cuff exercise while you palpate and feel for the tendons at the attachment sites, on the body landmarks. Adams cr, demartino am, rego g, denard pj, burkhart ss. Specific interventions should be based on the needs of the individual and should consider exam findings and clinical decision making. Choose from 500 different sets of rotator cuff anatomy physiology flashcards on quizlet. A rotator cuff injury can cause a dull ache in the shoulder, which often worsens. Rotator cuff tears often present with shoulder pain, weakness, and loss of range of motion. Your rotator cuff in made up of four muscles that join together as tendons in your shoulder to form a thick covering at the top of the humerus the bone in the upper arm. We will concentrate on sst and ist and will do subscapularis in a different post.
Because there is no plane between the sst and ist tendons, one of the difficulties is in determining on mri which tendon is involved when there is a tear at rotator cuff anatomy read more. The natural course of nonoperatively treated rotator cuff tears. Rotator cuff injuries can range in severity from simple inflammation to complete tears. Please practice handwashing and social distancing, and check out our resources for adapting to these times. A frequent source of that pain is a torn rotator cuff. Current perspectives on rotator cuff anatomy arthroscopy. The rotator cuff is made up of four muscles supraspinatus, infraspinatus, subscapularis, and teres minor and their tendons. Explore and learn the muscles of the shoulder with our 3d interactive anatomy muscle atlas. Trauma, such as falls, lifting, and pulling forcefully can also cause a rotator cuff tear. The rotator cuff has the important jobs of stabilizing the shoulder, elevating and rotating the arm, and ensuring the head of the humerus stays securely placed in the shoulder socket. Degenerative ac joint may impinge onto the rotator cuff. Pdf the rotator cuff includes the following muscles. A torn rotator cuff is a common injury that affects a persons ability to lift and rotate their arm.
986 1561 819 1122 186 506 360 864 225 515 1333 1170 894 513 177 1293 321 1379 474 1401 608 912 571 477 794 365 94 75 206 181 1060