Shaft of the ulna

Definition

The shaft of the ulna is the long, narrow, central portion of the ulna bone, extending from the elbow to the wrist. It provides structural support and surface area for muscle attachment in the forearm.

Related terms

Olecranon: The prominent bony projection of the ulna at the elbow joint which acts as a lever point for elbow extension.

Radial Notch: A small depression on the ulna where it articulates with the head of the radius to form part of the proximal radioulnar joint.

Ulnar Styloid Process: A pointed structure located at the distal end of the ulna, providing attachment for ligaments of the wrist joint