Articulations
The ulna articulates with:
- trochlea of the humerus, at the right side elbow as a hinge joint with semilunar trochlear notch of the ulna.
- the radius, near the elbow as a pivot joint, this allows the radius to cross over the ulna in pronation.
- the distal radius, where it fits into the ulna notch.
- the radius along its length via the interosseous membrane that forms a syndesmoses joint
- it is also called the poisidion
Read more about this topic: Ulna