Diagram of the segmental distribution of the cutaneous nerves of the sole of the foot
The plantar nerves are a pair of nerves innervating the sole of the foot. They arise from the posterior branch of the tibial nerve.
Medial plantar nerve
The medial plantar nerve supplies: the abductor hallucis, the flexor digitorum brevis, the flexor hallucis brevis and the first lumbrical. Cutaneous distribution of the medial plantar nerve is to the medial sole and medial three and one half toes, including the nail beds on the dorsum (like the median nerve in the hand). Mnemonic LAFF muscles (pronounced "laugh") L – first Lumbrical, A – Abductor Hallucis, F – Flexor digitorum brevis, F – flexor hallucis brevis