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Extensor Pollicis Longus

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Origin

Illustration of the Extensor Pollicis Longus muscle
  • Posterior surface of middle 1/3 of Ulna
  • Interosseous Membrane

Insertion

  • Posterior surface of base of distal phalanx of digit 1 (thumb)

Actions

  • Extension of digit 1 (thumb) at the metacarpophalangeal and interphalangeal joints
  • Wrist extension (weak)

Vascular Supply

  • Posterior Interosseous Artery
  • Anterior Interosseous Artery

Nerve

  • Posterior Interosseous Nerve (C7-C8) (branch of Radial Nerve)

Clinical Significance


See Also


References


Created by:
Chris Hauglid on 30 April 2020 08:21:59
Authors:
Last edited:
3 May 2024 02:23:13
Category: