shoulder ligaments anatomy
The âballâ is the head of the humerus and the âsocketâ is theglenoid part of the shoulder blade (scapula).The anatomy of the shoulder is unique â it has a relatively shallow socket which results in amazing flexibility and range of motion to the shoulder joint which is unparalleled elsewhere in the body.he âballâ is the head of the humerus and the âsocketâ is theglenoid part of the shoulder blade (scapula).The anatomy of the shoulder is unique â it has a relatively shallow socket which results in amazing flexibility and range of motion to the shoulder joint which is unparalleled elsewhere in the body.