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Abductor digiti minimi muscle (hand, anatomy)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Abductor digiti minimi is one of the intrinsic hand muscles.

It arises from three contiguous sites:

  • pisiform bone
  • pisohamate ligment
  • flexor retinaculum

It inserts into the following structures:

  • ulnar border of base of proximal phalanx
  • extensor expansion of little finger
  • sesamoid bone

The action of abductor digiti minimi is to abduct the little finger at the metacarpophalangeal joint.

It is innervated by the deep branch of the ulnar nerve.


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