Abductor Digiti Minimi

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The Abductor Digiti Minimi is a muscle of the hand.

Anatomical Attachments:

• Origin: Attaches to the pisiform bone and the tendon of the flexor carpi ulnaris
• Insertion: Attaches to the medial side of the base of the proximal phalanx of the little finger.

Action: Abducts the little finger.

Synergist: Palmaris brevis, Flexor digiti minimi, and Opponens digiti minimi.

Antagonist: Abductor pollicis brevis, flexor pollicis brevis, Opponens pollicis, Adductor pollicis.

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Nerve Supply: Ulnar nerve (C8, T1).

Nerve Entrapment: It entraps the digital nerves that cause cutaneous hypoesthesia along the side of the finger that is affected.

Vascular supply: Deep volar branch of the ulnar artery and the dorsum carpal branch of the ulnar artery.

• Primary: The pain refers along the outer aspect of the little finger.

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