Head of the ulna

Definition

The head of the ulna is the distal (far) end of the ulna bone, which is one of the two long bones in the forearm. It articulates with the wrist bones, specifically with the ulnar notch of the radius and articular disc of the wrist, facilitating wrist movement.

Related terms

Radius: The radius is one of two forearm bones and articulates with both the elbow and wrists, working closely with the ulna to enable arm movement.

Articular disc: A triangular fibrocartilage that separates and cushions between joints, such as those in between your wrist's ulna bone and carpals, ensuring smooth movement.

Ulnar notch: A depression on the distal end of the radius bone that accommodates the head of the ulna, enabling pivotal motion between these two forearm bones