Medial dorsal cutaneous nerve

The medial dorsal cutaneous nerve (internal dorsal cutaneous branch) is the more medial one of the two terminal branches of the superficial fibular nerve (the other being the intermediate dorsal cutaneous nerve). Through its branches, it provides innervation to parts of the dorsal aspects of the first, second, and third toes.

Origin
The superficial fibular nerve terminates by bifurcating into the medial dorsal cutaneous nerve and the intermediate dorsal cutaneous nerve immediately after emerging from the deep fascia of leg at the distal two-thirds to three-fourths point of the leg.

Branches and distribution
The medial dorsal cutaneous nerves trifurcates at the inferior border of the ankle, giving rise to:


 * a medial branch which passes anteromedially before giving rise to the medial dorsal digital nerves of the firstst toe;
 * a middle branch which passes anteriorly superficial to the first intermetatarsal space and anastomoses with the tibial nerve before bifurcating in the distal portion of the intermetatarsal space to give rise to the lateral digital dorsal nerve of the first toe, and the medial digital dorsal nerve of the second toe;
 * a lateral branch which passes anteriorly superficial to the second intermetatarsal space to give rise to the give rise to the lateral digital dorsal nerve of the second toe, and the medial digital dorsal nerve of the third toe.

It also supplies the integument of the medial side of the foot and ankle.

Anastomoses
It forms anastomoses with the saphenous nerve, and the deep fibular nerve.