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 By TeachMeSeries Ltd (2025) Fig 2Muscles in the deep layer of the posterior leg. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article