MuscleLeg — posterior deep
Flexor digitorum longus
Latin: M. flexor digitorum longus
Location: Leg
View the flexor digitorum longus in 3DOrigin
Posterior tibia below the soleal line.
Insertion
Bases of the distal phalanges of the lateral four toes.
Action
Flexes the toes and plantarflexes the ankle; supports the medial arch and the toe-off push.
Nerve supply
Tibial nerve (L5–S1).
Blood supply
Posterior tibial artery.
Clinical relevance
Its tendon is transferred to replace a failed tibialis posterior in flatfoot reconstruction; imbalance with the intrinsic foot muscles produces claw toes.
Educational anatomy reference, not medical advice. About this content.