Ulna

Seattle Figure Studio
Sep 20, 2025
Review Pending

Illustrations

Henry Vandyke Carter, Public domain, via Wikimedia Commons
Henry Vandyke Carter, Public domain, via Wikimedia Commons

Bony Landmarks

Coronoid process #

Anterior projection distal to the trochlear notch that helps form the elbow joint and provides attachment for the Brachialis.

Head of ulna #

Distal rounded end articulating with the radius and the wrist's fibrocartilage complex.

Interosseous border #

Sharp lateral ridge along the shaft where the interosseous membrane attaches, linking ulna to radius.

Olecranon process #

Large posterior hook forming the elbow point; insertion site for Triceps and attachment for Anconeus and Flexor Carpi Ulnaris.

Radial notch #

Shallow lateral depression receiving the head of the 🦴 radius to form the proximal radioulnar joint.

Styloid process #

Pointed distal projection for the ulnar collateral ligament of the wrist.

Supinator crest #

Ridge on the proximal lateral ulna providing origin for the supinator.

Trochlear notch #

C-shaped articular surface below the olecranon that grips the humeral trochlea.

Ulnar tuberosity #

Rough area below the coronoid process on the anterior shaft where Brachialis and flexor digitorum profundus attach.

Muscle Origins #

By Bony Landmarks

Muscle Insertions #

Coronoid process and ulnar tuberosity

Lateral olecranon

Olecranon process

Posterior border of ulna

Ulnar shaft (anteromedial surface)

Ulnar tuberosity (anteromedial shaft)

Examples

Styloid Process

Diogenes, Jean-Leon Gerome, 1860

References