Extensor digiti minimi
Arms
Deep muscle — it lies under other muscles. X-ray makes the muscles over it see-through.
- Origin
- Lateral epicondyle of the humerus (common extensor origin)
- Insertion
- Extensor expansion of the little finger
- Action
- Extends the little finger
- Nerve supply
- Posterior interosseous nerve (radial nerve, C7–C8)
A slender muscle beside the extensor digitorum that gives the little finger its own extensor tendon.
Extensor digiti minimi anatomy page →