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Opponens Digiti Minimi

Origin Hook of hamate and flexor retinaculum
Insertion Medial border of 5th metacarpal
Action Draws 5th metacarpal anteriorly and rotates it, bringing little finger (5th digit) into opposition with thumb
Innervation Deep branch of ulnar nerve (C8 and T1) (C8, T1)
Arterial Supply Ulnar artery

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