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Signs and symptoms of a dislocation or rotator cuff tear such as: Significant pain, which can sometimes be felt past the shoulder, along the arm. Inability to move the arm from its current position, particularly in positions with the arm reaching away from the body and with the top of the arm twisted toward the back. Numbness of the arm.
One possible long-term consequence result of a rotator cuff tear is called proximal humeral head migration, this is where the "ball" of the shoulder joint rests higher in the shoulder joint "socket" disrupting normal shoulder mechanics. [89] Only tear size is an independent predictor of humeral migration.
The glenoid cartilage underneath the labrum in the glenohumeral (GH) joint is disrupted by glenolabral articular disruption. [5] The articulation of the humeral head inside the glenoid fossa of the scapula forms the GH joint itself, which is a synovial ball and socket joint.
The onset of the pain may be acute if due to an injury or insidious if due to a gradual process such as an osteoarthritic spur. The pain has been described as dull rather than sharp, and lingers for long periods of time, making it hard to fall asleep. [2] Other symptoms can include a grinding or popping sensation during movement of the shoulder ...
The rotator cuff can cause pain in many different ways including tendonitis, bursitis, calcific tendonitis, partial thickness tears, full thickness tears or mechanical impingement. [5] Tendinitis , bursitis , and impingement syndrome can be treated with tendon repair and the Mumford procedure or acromioplasty .
The hardening of the shoulder joint capsule is central to the disease process. This is the result of scar tissue around the joint capsule. [14] There also may be a reduction in synovial fluid, which normally helps the shoulder joint, a ball and socket joint, move by lubricating the gap between the humerus and the socket in the shoulder blade.
The shoulder joint is considered a ball-and-socket joint. However, in bony terms the 'socket' (the glenoid fossa of the scapula) is quite shallow and small, covering at most only a third of the 'ball' (the head of the humerus). The socket is deepened by the glenoid labrum, stabilizing the shoulder joint. [1] [2]
Shoulder arthritis is a clinical condition in which the joint that connects the ball of the arm bone (humeral head) to the shoulder blade socket (glenoid) has damaged or worn out cartilage. Normally the ends of the bone are covered with hyaline articular cartilage , a surface so smooth that the friction at the joint is less than that of an ice ...