medial calcaneal branches of the tibial nerve 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. medial calcaneal branches of the tibial nervediagram of the segmental distribution of the cutaneous nerves of the sole of the foot.nerves of the right lower extremity posterior view. (medial calcaneal labeled at bottom left.) diagram of the segmental distribution of the cutaneous nerves of the sole of the foot.detailsfromtibial nerveidentifierslatinrami calcanei mediales nervi tibialista98a14.2.07.065ta26589fma44710anatomical terms of neuroanatomy 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.