Origin

Common extensor tendon (lateral epicondyle), ulna

Insertion

5th metacarpal

Action(s)

The Extensor carpi ulnaris extends the wrist, but when acting alone inclines the hand toward the ulnar side; by its continued action it extends the elbow-joint.

The muscle is a minor extensor of the carpus in carnivores, but has become a flexor in ungulates. In this case it is described as ulnaris lateralis.

Nerve Supply

The posterior interosseus nerve, a branch of the radial nerve

Arterial Supply

Ulnar artery

Physical Exam

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Clinical Importance

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Disease States

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Discussion

Antagonist: Flexor carpi ulnaris

Figures

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Credits:

From Wikipedia:
Extensor carpi ulnaris

Attachments:


ulnaris.png (image/png)