Extensor Digitorum Brevis

Written by Sanya Trikha

Last updated March 1, 2024 • 16 Revisions

The extensor digitorum brevis is an intrinsic muscle of the foot. It is a small, thin muscle which lies underneath the long extensor tendons of the foot.

  • Attachments: Originates from the calcaneus and inferior extensor retinaculum. It attaches onto the long extensor tendons of toes 2-4.
  • Actions: Extension of the lateral four toes.
  • Innervation: Deep fibular nerve.
  • Blood Supply: Fibular artery and anterior tibial artery (dorsal pedis artery distally).

Fig 1.0
The dorsal layer of foot muscles.

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