Medial calcaneal branches of the tibial nerve

The medial calcaneal branches of the tibial nerve (internal calcaneal branches) perforate the laciniate ligament, and supply the skin of the heel and medial side of the sole of the foot.

Structure
The medial calcaneal nerve originates either from the tibial nerve or the lateral plantar nerve. It splits into two cutaneous branches.

Function
The medial calcaneal nerve provides sensory innervation to the medial side of the heel.