Muscle
Extensor carpi ulnaris
Extends and adducts the wrist
High-yield
Extends and adducts (ulnar deviates) the wrist; posterior interosseous nerve.
Overview
The most medial superficial extensor, extending and ulnarly deviating the wrist. Supplied by the posterior interosseous nerve.
Reference facts
- Origin
Lateral epicondyle of the humerus and posterior border of the ulna
- Insertion
Base of the 5th metacarpal
- Action
Extends and adducts (ulnarly deviates) the wrist
- Innervation
Posterior interosseous nerve (C7, C8)
- Blood supply
Ulnar / posterior interosseous arteries