Muscle
Flexor hallucis longus
Flexes the big toe, push-off
High-yield
Push-off power for the great toe; tibial nerve. Tendon is the "Harry" behind the medial malleolus.
Overview
A powerful deep posterior leg muscle that flexes the great toe and provides the final push-off in walking and running.
Reference facts
- Origin
- Posterior surface of the fibula and interosseous membrane
- Insertion
- Base of the distal phalanx of the great toe
- Action
- Flexes the great toe and plantarflexes the ankle; supports the medial arch
- Innervation
- Tibial nerve (S1, S2, S3)
- Blood supply
- Fibular (peroneal) artery
Frequently asked questions
What does the flexor hallucis longus do?
The flexor hallucis longus flexes the great toe and plantarflexes the ankle; supports the medial arch.
What nerve innervates the flexor hallucis longus?
The flexor hallucis longus is innervated by the tibial nerve (S1, S2, S3).
Where does the flexor hallucis longus attach?
The flexor hallucis longus originates from the posterior surface of the fibula and interosseous membrane and inserts on the base of the distal phalanx of the great toe.
What is the blood supply of the flexor hallucis longus?
The flexor hallucis longus is supplied by the fibular (peroneal) artery.