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Shoulder: the part of the body between the neck and the upper arm
Source: WordNet 2.1
Shoulder : junction of the arm and trunk; also that part of the trunk which is bounded at the back by the scapula.
The shoulder joint is composed of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) (see diagram). 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, commonly called the shoulder joint, is a ball-and-socket type joint that helps move the shoulder forward and backward and allows the arm to rotate in a circular fashion or 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 scapula into which the ball fits.) 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, holds the ball at the top of the humerus in the glenoid socket and provides mobility and strength to the shoulder joint.
Two filmy sac-like structures called bursae permit smooth gliding between bone, muscle, and tendon. They cushion and protect the rotator cuff from the bony arch of the acromion. (Source: excerpt from Questions and Answers about Shoulder Problems: NIAMS)
Shoulder: The shoulder is an area of the body that includes three joints, which are formed by the articulation of the clavicle, scapula, and humerus. The three joints include the acromioclavicular joint, glenohumeral joint and the sternoclavicular joint. The shoulder facilitates a wide range of motion for the upper extremities and also includes the pectoral girdle, cartilage, and many points of attachment for the muscles, ligaments and tendons that also make up the shoulder.
Conditions that can afflict the shoulder include arthritis, rotator cuff tear, trauma, fracture, infection, dislocation, winged scapula, osteomyelitis and osteolysis.
The following organs are closely related to the organ: Shoulder:
The following conditions are related to the organ: Shoulder:
The following list contains sub-parts of the organ: Shoulder:
These symptoms are related to afflictions of the organ: Shoulder:
Condition count: 18 ; see list below.
Organ subtypes: clavicle (2)
Organ types: Arm (64)
Number: 2 shoulders
Organs: list of all organs
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