Tibial nerve: larger terminal branch of the sciatic nerve, arising above the popliteal fossa.
Passes through the popliteal fossa and posterior compartment of the leg, then enters the sole deep to the flexor retinaculum, dividing into medial and lateral plantar nerves.
Course and Distribution
Motor: supplies all muscles of the posterior compartment of the leg directly, and all muscles of the sole through the medial and lateral plantar nerves.
Sensory: the medial and lateral plantar nerves supply the whole skin of the sole of the foot and toes, including the dorsal aspect of their distal phalanges.