Ulna

ULNA

It is the medial bone of the forearm. It articulates proximally with the humerus and radius and distally only with the radius. It is a long bone that has two epiphyses and a diaphysis.

Proximal Epiphysis

Olecran & #8211; Big eminence that forms the tip of the elbow

Troclear Notch & #8211; Great depression formed by the olecranon and the coronoid process and serves to articulate with the humeral trochlea

Coronoid Process & #8211; It protrudes from the anterior and proximal part of the ulna body

Radial Notch & #8211; Articulates with the radio head

Ulnar Tuberosity

Distal Epiphysis

Ulna Head & #8211; Rounded joint eminence laterally located

Styloid Process & #8211; Located more medially and more prominent (not articular)

Diaphysis

It has three borders and three faces.

Borders:

Interosseous Edge

Previous Edge

Dorsal Edge

Faces:

Previous Face

Dorsal Face

Medial Face

THE Ulna hinges with two bones: the humerus and the radius.

ULNA & #8211; PREVIOUS, REAR AND SIDE VIEWS

Ulna - Anterior, Posterior and Lateral Views

Source: SOBOTTA, Johannes. Atlas of Human Anatomy. 21st. Rio de Janeiro: Guanabara Koogan, 2000.

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