On the lateral side of the coronoid process is the radial notch which is a small depression that articulates with the head of the radius. The elbow joint is a synovial hinge joint limited to flexion and extension. In the anterior view, the radio-ulnar joint may be appreciated. The radio-ulnar joint is a synovial pivot joint between the head of the radius and the radial notch of the ulna. This rotation of the radius about the ulna allows for the movements of pronation and supination.
Pronation is movement of the forearm in which the palm is turned posterior.
Supination is movement of the forearm in which the palm is turned anterior. All rights reserved.