Movement at the proximal radio-ulnar joint
- This joint, together with the distal radio-ulnar joint, allows for the pronation and supination of the forearm.
- The articular circumference of the radial head (upper end of the radius) fits in the radial notch of the upper end of the ulna and moves in a rotational motion.
- The supinating and pronating movements are performed in the range of 90° and 85°, respectively.