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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 Proximal JointsUlna Distal Joint

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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