Abductor Digiti Minimi Hand Anatomy

Abductor Digiti Minimi Hand

Origin:  Volar surface of the pisiform, the tendon of flexor carpi ulnaris, and the pisohamate ligament
Insertion:  Medial aspect of the base of the proximal phalanx of the fifth digit and, occasionally, a slip to the ulnar side of the extensor apparatus of the fifth digit
Actions: Abduction of the fifth digit
Innervation: Ulnar nerve (C8, T1)
Blood Supply: Deep palmar branches of the radial artery

Primary Actions of the Abductor Digiti Minimi Hand Muscle

1. Abduction of the fifth digit at the metacarpophalangeal joint

Agonists:

  • Extensor digitorum

Antagonists:

  • Third dorsal interosseous

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