Ligaments connect bone to bone. The major ligaments of the elbow are the ulnar collateral, radial collateral and annular ligaments (Fig.2).
The muscles that flex and extend elbow are the biceps which flex the elbow, as well as aid rotation and the triceps which extends or straightens the elbow (Fig.3). Other rotators of the elbow are the supinator and the pronator teres. Muscles are attached to bones by tendons.