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Updated: 1/1/2022

Extensor Pollicis Longus

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  • Summary
      • Extensor Pollicis Longus
      • Origin
      • Posterior surface of middle 1/3 of ulna and interosseous membrane
      • Insertion
      • Base of distal phalanx of thumb
      • Action
      • Extends distal phalanx of thumb at metacarpophalangeal and interphalangeal joints
      • Innervation
      • Posterior interosseous nerve (C7, C8)
      • Arterial supply
      • Posterior interosseous artery

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