Flexor digitorum longus (S2) - Anatomy

Origin	Posterior surface of tibia distal to popliteal line
Insertion	Splits into four slips after passing through medial intermuscular septum of plantar surface of foot; these slips then insert on plantar surface of bases of 2nd - 5th distal phalanges
Action	Flexes toes 2 - 5; also helps in plantar flexion of ankle
Innervation	Tibial nerve (S2, S3) (S2, S3)
Arterial Supply	Muscular branch of posterior tibial artery