Flexor Hallucis Longus

Written by Roxanne Salkeld

Last updated January 16, 2023 • 4 Revisions •

The flexor hallucis longus is a muscle within the deep compartment of the posterior leg. It is located laterally within this compartment (this is slightly counter-intuitive, as it is the opposite side to the great toe).

  • Attachments: Originates from the posterior surface of the fibula and attaches to the plantar surface of the phalanx of the great toe.
  • Actions: Flexion of the great toe.
  • Innervation: Tibial nerve
  • Blood supply: Posterior tibial artery

Fig 2
Muscles in the deep layer of the posterior leg.

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