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 …
Commonly thought of as a single joint, the shoulder is actually made up of two separate joints – the glenohumeral and acromioclavicular joints. These two joints work together to allow the arm both to circumduct in a large circle and to rotate around its axis at the shoulder.
Shoulder blade ( scapula) Collarbone (clavicle) The scapula has one part that forms a socket for the ball-and-socket shoulder joint; this is called the glenoid. The glenoid is covered with smooth cartilage. Where the rounded top of the arm bone (humerus) contacts the shoulder blade is called the glenohumeral joint.
The Shoulder Joint
