Question - What does the shoulder joint look like?

Answered by: Donald Long  |  Category: General  |  Last Updated: 16-06-2022  |  Views: 1025  |  Total Questions: 14

The shoulder joint is formed where the humerus (upper arm bone) fits into the scapula (shoulder blade), like a ball and socket. Other important bones in the shoulder include: The acromion is a bony projection off the scapula. The clavicle (collarbone) meets the acromion in the acromioclavicular joint. The shoulder is made up of three bones: the scapula (shoulder blade), clavicle (collarbone) and humerus (upper arm bone). Two joints in the shoulder allow it to move: the acromioclavicular joint, where the highest point of the scapula (acromion) meets the clavicle, and the glenohumeral joint. Your shoulder is made up of three bones: your upper arm bone (humerus), your shoulder blade (scapula), and your collarbone (clavicle). The head of your upper arm bone fits into a rounded socket in your shoulder blade. This socket is called the glenoid. Arthritis is damage to the cartilage in joints. Shoulder arthritis occurs when the cartilage starts wearing down on the ball and/or socket sides of the shoulder joint. Symptoms of shoulder arthritis may include pain in the shoulder joint, stiffness and reduced range of motion. Anatomy. Your shoulder joint is a ball-and-socket joint. The head of the humerus (upper arm bone) is the ball and the scapula (shoulder blade) forms the socket where the humerus sits. The scapula and arm are connected to the body by multiple muscle and ligament attachments.

https://en.wikipedia.org/wiki/Shoulder

Structure. The shoulder consists of a ball-and-socket joint formed by the humerus and scapula and their surrounding structures - ligaments, muscles, tendons - which support the bones and maintain the relationship of one to another.

https://www.arthritis-health.com/types/joint-anatomy/shoulder-joint-structure

Rotator cuff muscles extend from the scapula to the humeral head, stabilizing the glenohumeral joint by hugging the humeral head to the glenoid. There is also a bursa around the glenohumeral joint. It is a small fluid-filled sac that helps the muscles and tendons slide freely as the shoulder moves.

https://www.shoulderdoc.co.uk/article/1177

There are four joints making up the 'shoulder joint': The shoulder joint itself known as the Glenohumeral joint, (is a ball and socket articulation between the head of the humerus and the glenoid cavity of the scapula) The acromioclavicular (AC) joint (where the clavicle meets the acromion of the scapula)

https://www.baxterregional.org/medical-services/orthopaedics/upper-body/shoulder/anatomy-of-the-shou

The uppermost tendon of the rotator cuff, the supraspinatus tendon, passes beneath the bone on the top of the shoulder, called the acromion.

https://www.healthpages.org/anatomy-function/shoulder-structure-function-and-problems/

The shoulder is not a single joint, but a complex arrangement of bones, ligaments, muscles, and tendons that is better called the shoulder girdle. The primary function of the shoulder girdle is to give strength and range of motion to the arm. The shoulder girdle includes three bones—the scapula, clavicle and humerus.

https://www.healthline.com/human-body-maps/shoulder-muscles

The shoulder has about eight muscles that attach to the scapula, humerus, and clavicle. These muscles form the outer shape of the shoulder and underarm. Other muscles that aid in shoulder movement include: Infraspinatus: This rotator cuff muscle helps with the raising and lowering of the upper arm.

https://familydoctor.org/shoulder-pain/

The supraspinatus muscle rests on top of the shoulder. Its tendon travels under the bone on the outside of the shoulder (the acromion). This tendon is the one most often injured because of its position between the bones.

https://en.wikipedia.org/wiki/Shoulder_girdle

The shoulder girdle or pectoral girdle is the set of bones in the appendicular skeleton which connects to the arm on each side. In humans it consists of the clavicle and scapula; in those species with three bones in the shoulder, it consists of the clavicle, scapula, and coracoid.

https://orthoinfo.aaos.org/en/diseases--conditions/arthritis-of-the-shoulder

X-rays of an arthritic shoulder will show a narrowing of the joint space, changes in the bone, and the formation of bone spurs (osteophytes). This x-ray shows severe osteoarthritis of the glenohumeral joint.

https://www.mayoclinic.org/tests-procedures/cortisone-shots/about/pac-20384794

There's concern that repeated cortisone shots might damage the cartilage within a joint. So doctors typically limit the number of cortisone shots into a joint. In general, you shouldn't get cortisone injections more often than every six weeks and usually not more than three or four times a year.

https://www.webmd.com/arthritis/detecting-arthritis

In addition to symptoms and a doctor's exam, blood tests and X-rays are commonly used to confirm rheumatoid arthritis. X-rays are used to diagnose osteoarthritis, typically revealing an uneven loss of cartilage and spurring of the underlying bone.

https://www.arthritis-health.com/types/osteoarthritis/what-shoulder-osteoarthritis

A loss of cartilage can affect the shoulder's biomechanics. The humerus and glenoid may rub and grind against one another. The bone-on-bone friction can cause shoulder pain. To compensate for the deteriorated cartilage, the humerus and glenoid may produce excess cells.

https://orthoinfo.aaos.org/en/diseases--conditions/shoulder-impingementrotator-cuff-tendinitis

The bursa can become inflamed and swell with more fluid causing pain. Impingement. When you raise your arm to shoulder height, the space between the acromion and rotator cuff narrows. The acromion can rub against (or "impinge" on) the tendon and the bursa, causing irritation and pain.

https://www.medicalnewstoday.com/articles/320495.php

Share on Pinterest Shoulder bursitis may cause symptoms such as limited range of movement in the shoulder, and pain at the tip of the shoulder. Key symptoms of shoulder bursitis include: pain around the outside or tip of the shoulder. pain when the shoulder is touched.