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At the glenohumeral joint, movement of the humerus is performed by a combination of transverse abduction, by the posterior and lateral deltoids, [3] and external rotation, by the infraspinatus and teres minor. [4] At the scapulothoracic joint, the middle and lower fibers of the trapezius and the rhomboids contract to perform retraction of the ...
The glenohumeral joint, to which the term "shoulder joint" commonly refers, is a ball-and-socket joint that allows the arm to rotate in a circular fashion or to hinge out and up away from the body. The "ball" is the top, rounded portion of the upper arm bone or humerus; the "socket," or glenoid , is a dish-shaped part of the outer edge of the ...
Subacromial bursitis is a condition caused by inflammation of the bursa that separates the superior surface of the supraspinatus tendon (one of the four tendons of the rotator cuff) from the overlying coraco-acromial ligament, acromion, and coracoid (the acromial arch) and from the deep surface of the deltoid muscle. [1]
The combination of scapulothoracic exercises and glenohumeral exercises allow for a more effective healing process. Scapulothoracic exercises focus on movements of the scapula relative to the thoracic ribcage. Muscle groups such as serratus anterior, trapezius, and rhomboid major/minor need to be strengthened to allow for shoulder function.
The shoulder joint has a very loose joint capsule, which can sometimes predispose the shoulder to dislocate. [citation needed] The "U shaped" dependent portion of the axillary part of the capsule ,located between the anterior and posterior bands of inferior glenohumeral ligament, is called "axillary pouch". [3]
Weight training exercises where the arms are elevated above shoulder height but in an internally rotated position such as the upright row have been suggested as a cause of subacromial impingement. [7] Another common cause of Impingement syndrome is restrictions in the range movement of the scapulo-thoracic surfaces.
“The main reason many people have balance problems when they get older is because our senses tend to decline as we age,” explains Sabrena Jo, a personal trainer certified in working with ...
Shoulder arthritis is characterized by pain, stiffness, and loss of function and often by a grinding on shoulder motion. [1] One of the three forms of shoulder arthritis is osteoarthritis. Osteoarthritis is the gradual wearing down of the joint cartilage that occurs predominantly in elderly people, and sometimes as the result of overuse in ...