The anterior portion of the lateral epicondyle of the humerus (common extensor tendon)


At the extensor expansion, located at the base of the proximal phalanx of the finger on the dorsal side


Extends the little finger at all joints

Nerve Supply

Posterior interosseous nerve (C7, C8)

Arterial Supply

The posterior interosseous artery which originates from the common interosseous artery and more proximally, the ulnar artery

Physical Exam

Enter physical examination maneuvers for muscle

Clinical Importance

Enter clinical importance of muscle

Disease States

Enter links to pages where muscle involved


An additional fibrous slip from the lateral epicondyle; the tendon of insertion may not divide or may send a slip to the ring finger.

Absence of muscle rare; fusion of the belly with the Extensor digitorum communis not uncommon.


Click thumbnail for larger image


From Wikipedia:
Extensor digiti minimi


minimi.png (image/png)