Updated: 12/28/2021

Abductor Pollicis Longus

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  • Summary
    • Abductor Pollicis Longus
      Origin
      Posterior surfaces of ulna, radius and interosseous membrane
      Insertion
      Base of 1st metacarpal
      Action
      Abducts thumb and extends it at carpometacarpal joint
      Innervation
      Posterior interosseous nerve (C7, C8)
      Arterial Supply
      Posterior interosseous artery

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