Origin

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

Insertion

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

Action(s)

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

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Clinical Importance

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Disease States

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Discussion

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.

Figures

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Credits:

From Wikipedia:
Extensor digiti minimi

Attachments:


minimi.png (image/png)