Extensor indicis muscle

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Description:

Origin:
Posterior surface of ulna in lower half where it attaches distal to the extensor pollicis longus

Insertion:
On the ulnar side of extensor digitorum tendon near the head of the metacarpal bone it joins the extensor expansion

Actions:
Extends the pointer finger

Nerve supply:
Radial nerve

Blood supply:
Branches of the radial and ulnar arteries