Flexor Hallucis Longus

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 2
Muscles in the deep layer of the posterior leg.