Origin | The anterior portion of the lateral epicondyle of the humerus (common extensor tendon) |
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Insertion | At the extensor expansion, located at the base of the proximal phalanx of the finger on the dorsal side |
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Action(s) | Extends the little finger at all joints |
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Nerve Supply | Posterior interosseous nerve (C7, C8) |
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Arterial Supply | The posterior interosseous artery which originates from the common interosseous artery and more proximally, the ulnar artery |
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Physical Exam | Enter physical examination maneuvers for muscle |
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Clinical Importance | Enter clinical importance of muscle |
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Disease States | Enter links to pages where muscle involved |
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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. |
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