Fig. 3. The bifurcation patterns for tibial nerve. Type I, a pattern in which the medial calcaneal nerve branched proximal to the bifurcation point of medial and lateral plantar nerves; type II, a branching pattern in which the three branches occurred at the same point; type III, a pattern in which the medial calcaneal nerve branched distal to the bifurcation point of the medial and lateral plantar nerves.