Gourt > Health > Conditions and Diseases > Musculoskeletal Disorders > Shoulder
- This article is about the body part. See hard shoulder for the road segment.
In human anatomy, the shoulder joint is composed of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone). Two joints facilitate shoulder movement. The acromioclavicular (AC) joint is located between the acromion (part of the scapula that forms the highest point of the shoulder) and the clavicle. The glenohumeral joint, to which the generic term "shoulder joint" usually 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 humerus; the "socket," or glenoid, is a dish-shaped part of the outer edge of the scapula into which the ball fits.) Arm movement is further facilitated by the ability of the scapula to slide both laterally and vertically along the rib cage. The capsule is a soft tissue envelope that encircles the glenohumeral joint. It is lined by a thin, smooth synovial membrane.
The bones of the shoulder are held in place by muscles, tendons, and ligaments. Tendons are tough cords of tissue that attach the shoulder muscles to bone and assist the muscles in moving the shoulder. Ligaments attach shoulder bones to each other, providing stability. For example, the front of the joint capsule is anchored by three glenohumeral ligaments.
The rotator cuff is a structure composed of tendons that, with associated muscles (supraspinatus, infraspinatus, teres minor and subscapularis), holds the ball at the top of the humerus in the glenoid socket and provides mobility and strength to the shoulder joint.
More on [ Shoulder ]
Shoulder's better. Off to the bank.
csramirez (Carlos S. Ramirez) Tue, 15 Dec 2009 17:23:41 -0000
Shoulder's better. Off to the bank.
Cop Tip for Chicks: Be aware of your surroundings at ATMs. Anyone in a parked car watching you? Following you? Looking over your shoulder?
RobinBurcell (Robin Burcell) Tue, 15 Dec 2009 17:23:26 -0000
Cop Tip for Chicks: Be aware of your surroundings at ATMs. Anyone in a parked car watching you? Following you? Looking over your shoulder?
HAHAHA pasti soal @haristerroe ye? xP RT @jonabsA7X "kepalanya ngelendot di shoulder gw.." LOL *wink
dianeyuri (Diane Yuri) Tue, 15 Dec 2009 17:22:48 -0000
HAHAHA pasti soal @haristerroe ye? xP RT @jonabsA7X "kepalanya ngelendot di shoulder gw.." LOL *wink
Eu não queria que meu cachorro tivesse morrido. Eu queria ele aqui! #NowPlaying: Over My shoulder - Mika - http://migre.me/ehwo -
anderson_d (Anderson Diamond) Tue, 15 Dec 2009 17:22:48 -0000
Eu não queria que meu cachorro tivesse morrido. Eu queria ele aqui! #NowPlaying: Over My shoulder - Mika - http://migre.me/ehwo -
At therapy still rehab'n my shoulder
DeeJayAsylum (John Puertas) Tue, 15 Dec 2009 17:22:07 -0000
At therapy still rehab'n my shoulder
I'm free. I'm free. Good god of jerk pork shoulder, I'm free.
FallenNstar (FallenNstar) Tue, 15 Dec 2009 17:21:52 -0000
I'm free. I'm free. Good god of jerk pork shoulder, I'm free.
Rotator Cuff Tears - Information about injuries to the rotator cuff, and surgical repair of this condition.
Meta Description: [ A rotator cuff tear is a common cause of shoulder pain and weakness. A rotator cuff tear damages the tendons around the shoulder joint. A rotator cuff tear can be painful and sometimes require surgery for treatment. ]
Shoulder India - Information on shoulder disorders from an Orthopaedic Surgeon.
Meta Description: [ Shoulder surgery, dislocation, rotator cuff, SLAP repair, Frozen Shoulder release, Arthroscopy, Open surgery India.
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Shoulder Pain - Information on common problems and their treatment.
Meta Description: [ Shoulder pain is an extremely common complaint that has many causes. Because we use our arms for so many common activities, shoulder pain can cause significant problems. In order for proper treatment, the cause of the problem must be identified. ]
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