The cuff adheres to the glenohumeral capsule and attaches to the humeral head. Strong glenohumeral ligaments and muscles prevents dislocation in most cases. This cavity forms the glenohumeral joint along with the humerus. In this movement, the glenohumeral joint atypically and concurrently abducts and the scapula internally rotates. In FSHD, the winged scapula is detected during contraction of the glenohumeral joint. The cuff adheres to the glenohumeral capsule and attaches to the head of the humerus. Clinically this is referred to as an anterior dislocation of the glenohumeral joint. Ropivacaine is toxic to cartilage and their intra-articular infusions can lead to Postarthroscopic glenohumeral chondrolysis. Bupivacaine is toxic to cartilage and its intra-articular infusions may lead to postarthroscopic glenohumeral chondrolysis. Most dislocations are apparent on radiographs showing incongruence of the glenohumeral joint. For example, the front of the joint capsule is anchored by three glenohumeral ligaments. The Samilson-Prieto classification is preferable for osteoarthritis of the glenohumeral joint. This cuff stabilizes the very mobile but inherently unstable glenohumeral joint. Pathology at the interval is also associated with glenohumeral and biceps instability. The Sulcus sign is an orthopedic evaluation test for glenohumeral instability of the shoulder.