Muscle Atlas

Extensor Digiti Minimi

Origin: Lateral epicondyle of humerus
Insertion: Extensor expansion of 5th digit
Action: Extends 5th digit at metacarpophalangeal and interphalangeal joints
Innervation: Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve
Arterial Supply: Interosseous recurrent artery

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