Extensor Hallucis Brevis

Written by Sanya Trikha

Last updated January 31, 2023 • 6 Revisions •

The extensor hallucis brevis is an intrinsic muscle of the foot. It is often considered to be the medial part of the extensor digitorum brevis muscle, rather than a separate structure.

  • Attachments: Originates from the calcaneus and inferior extensor retinaculum. It attaches to the base of the proximal phalanx of the great toe.
  • Actions: Extension of the great toe.
  • Innervation: Deep fibular nerve.
  • Blood Supply: Dorsalis pedis artery.

Fig 1
The dorsal layer of foot muscles.

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