This gives rise to the alternate name for the shoulder joint – the glenohumeral joint. Like most synovial joints, the articulating surfaces are covered with hyaline cartilage. The head of the humerus is much larger than the glenoid fossa, giving the joint a wide range of movement at the cost of inherent instability.
Anatomy of the Human Shoulder Joint 1 The glenohumeral joint is the ball-and-socket junction of the top of the arm bone, and the socket of the shoulder blade. 2 A second joint in the shoulder is the junction of the collar bone with the shoulder blade, called the acromioclavicular… More …
The muscles in the shoulder aid in a wide range of movement and help protect and maintain the main shoulder joint, known as the glenohumeral joint. The largest of these shoulder muscles is the deltoid. This large triangular muscle covers the glenohumeral joint and gives the shoulder its rounded-off shape.