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Updated: 12/28/2021

Extensor Pollicis Brevis

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  • Summary
      • Extensor Pollicis Brevis
      • Origin
      • Posterior surfaces of radius and interosseous membrane
      • Insertion
      • Base of proximal phalanx of thumb
      • Action
      • Extends proximal phalanx of thumb at metacarpophalangeal joint
      • Innervation
      • Posterior interosseous nerve (C7, C8)
      • Arterial Supply
      • Posterior interosseous artery

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