shoulder joint

The socket of the shoulder joint is part of the scapula, and if scapular movement is not normal, then shoulder function cannot be normal. Make the changes yourself here! Erin Pereira, PT, DPT, is a board-certified clinical specialist in orthopedic physical therapy. The synovial membrane lines the inner surface of the joint capsule, and produces synovial fluid to reduce friction between the articular surfaces. The rotator cuff is important in many routine activities, and when injured can cause severe pain. The acromioclavicular joint is formed by an articulation between the lateral end of the clavicle and the acromion process of the scapula. The glenohumeral joint is the ball-and-socket junction of the top of the arm bone, and the socket of the shoulder blade. By visiting this site you agree to the foregoing terms and conditions.

Fig 1.2 – The ligaments of the shoulder joint. Here, we shall consider the factors the permit movement, and those that contribute towards joint structure. Two joints are at the shoulder. The other major ligament is the coracoacromial ligament. Click below and just hit send! Sign up and learn how to better take care of your body. The shoulder joint is the junction between the chest and the upper extremity. To access the TeachMeAnatomy 3D Model, you must be a premium subscriber. Is our article missing some key information? The rotator cuff muscles are important in movements of the ball-and-socket shoulder joint. Dealing with joint pain can cause major disruptions to your day. The labrum also serves as the attachment of a major tendon in the shoulder, the biceps tendon. The most common labral tears are those associated with a shoulder dislocation, called a Bankart tear, and those associated with biceps tendon problems, called SLAP tears. While most people think of the rotator cuff when they think of muscles surrounding the shoulder joint, these are just four of the 17 muscles that cross the shoulder joint. Some of these other muscles are also critical to normal shoulder function. It extends from the anatomical neck of the humerus to the border or 'rim' of the glenoid fossa. This gives rise to the alternate name for the shoulder joint – the glenohumeral joint. Commonly thought of as a single joint, the shoulder is actually made up of two separate joints - the glenohumeral and acromioclavicular joints. Your shoulders are the joints where your upper-arm bones (humerus), shoulder blades (scapula), and collarbone (clavicle) meet.
Indeed, so-called ‘reverse Hill-Sachs lesions’ (impaction fracture of anteromedial humeral head) and ‘reverse Bankart lesions’ (detachment of posteroinferior labrum) can be seen in posterior dislocations. The socket of the shoulder joint is shallow, and the labrum gives the socket more depth, and thus more stability. Revisions: 34. All Rights Reserved. When the shoulder dislocates, the ligaments of the shoulder capsule can be torn.

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