Flexor Longus


Origin: Posterior surface of middle 3/5 of the tibia.

Insertion: Branches into 4 tendons that insert the plantar surface of the base of distal phalanx of the 4 lesser toes.


  • Flexes phalanges at all phalangeal and metatarsophalangeal articulations of 2nd to 5th toes.
  • Plantarflexes and inverts foot at the ankle.

Synergists: TIbialis posterior, FHL, FDB.

Nerve Supply:  Tibial, L5, S1.