Extensor digiti minimi (extensor digiti quinti proprius) is a muscle of the forearm that extends the little finger.
Extensor digiti minimi is a slim muscle located on the medial side of extensor digitorum. It connects directly with the latter muscle. Its tendon runs through a compartment of the extensor retinaculum behind the distal radioulnar joint, and divides in two as it crosses the hand to reach its insertion.
- All joints of the little finger
- May have a slip from the lateral epicondyle of the radius
- Tendon may not divide
- May send a tendon to the ring finger
- Rarely absent
- Often completely fused with extensor digitorum