The shoulder joint is comprised of the socket, which looks like a golf tee, and the upper part of the arm, the humeral head, which looks like a golf ball. Injury to shoulder ligaments and labrum can often render the shoulder joint unstable.
The shoulder joint is comprised of the socket, which looks like a golf tee, and the upper part of the arm, the humeral head, which looks like a golf ball. Injury to shoulder ligaments and labrum can often render the shoulder joint unstable.