Outline of shoulder showing parts of shoulder joint: acromion, coracoid process, coracoacromial ligament, subacromial space with bursa inside, clavicle (collarbone), scapula (shoulder blade), long head of biceps tendon, and supraspinatus (muscle and tendon that help form rotator cuff).
The two shoulders are located beneath the head connecting the arm and the chest. Each shoulder consists of 2 bones, the clavicle and the scapula, and collectively both shoulders account for 4 bones in the body. http://www.learnbones.com/shoulder-bones-anatomy/
A rotator cuff tear can occur in any of the 4 tendons of the rotator cuff; #supraspinatus, subscapularis, teres minor, or infraspinatus. However, most rotator cuff tears occur to the supraspinatus tendon. The supraspinatus tendon, originates on the scapula (shoulder blade) and passes under the acromioclavicular joint and the ligament that connects the coracoid process to the acromion, finally connecting to the greater tubercle (top of the humerus). #rotatorcuff
Even mild #inflammation of your tendons or bursa can produce redness, swelling, and soreness. Failure to treat the inflammation can lead to bursitis and/or tendonitis. If this occurs, the bursa or tendon can become enlarged and the area between the acromion process and the top of the humerus (the #subacromial space) may decrease causing the bursa or tendon to rub against the acromion. #bursitis