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Attachments

Anterior surface

Origin

         Flexor digitorum superficialis arises from the medial side of the coronoid process of ulna as part of the humero-ulnar head (so called sublime tubercle)

         Pronator teres (ulnar head) arises from ulnar coronoid process  distal to the sublime tubercle (origin of flexor digitorum superficialis.

         Flexor pollicis longus (rare) arises (when present) from medial border of coronoid process

         Flexor digitorum profundus arises from anterior and medial surfaces of upper 3/4th of the ulna

Insertion

         Brachialis is inserted into the ulnar tuberosity  and the medial aspect of coronoid process of ulna

Posterior surface

Origin

         Extensor indicis arises from the posterior surface of ulna distal to the attachment of the extensor pollicis longus

         Extensor pollicis longus arises from the posterior surface of ulna proximal to the extensor indicis; and from the middle third of its posterior surface.

         Abductor pollicis longus arises from the posterior surface of ulna distal to the anconeus

         Supinator arises from the proximal 1/3 of the radius

Insertion

         Anconeus is inserted into the lateral surface of the olecranon and to the proximal 1/4 of the posterior surface of the ulnar shaft.

         Triceps brachii is inserted into upper aspect of olecranon

 

 

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Creator: Oluwole Ogunranti