Ulnar notch of the radius

Definition

The ulnar notch of the radius is a small, shallow depression located on the distal end of the radius bone, where it articulates with the head of the ulna to form part of the distal radioulnar joint. This anatomical feature plays a crucial role in allowing for the rotation of the forearm.

Related terms

Radius:

The radius is one of two long bones in the forearm, positioned on its lateral side when in anatomical position and extending from elbow to wrist.

Ulna:

The ulna is a long bone found in the forearm that runs parallel to the radius, located on its medial side when in anatomical position, primarily involved in forming elbow joints with upper arm bones.

Distal Radioulnar Joint:

This joint is formed by the articulation between the head of ulna and ulnar notch on the distal end of radius, facilitating pronation and supination (rotational movements) of the forearm