There are three major shoulder joints: Glenohumeral joint (GH). This is the main shoulder joint that has a “ball and socket” and assists with deltoid muscle function. It holds the “ball ...

Dislocation—complete loss of contact between joint surfaces that requires a reduction manoeuvre to restore normal anatomy. This may be acute (first ... partial loss of contact between joint surfaces ...

Ball and socket joints also allow flexion and extension. Flexion of the shoulder joint occurs when the humerus (upper arm) moves forwards from the rest of the body, which happens at the end of an ...