This is a branch of the anterior crural nerve, from which it is given off at the brim of the pelvis. From this point it passes downwards in company with the femoral artery, and gives branches to the sartorius muscle.

About the middle of the thigh it reaches the surface by passing between the last-named muscle and the gracilis, accompanied by the saphenous vein and artery. It divides into an anterior small and a posterior larger branch, which supply the inner and front and the posterior and back parts of the thigh respectively.

Its ultimate fibres are distributed to the skin on the inner and back part of the leg as low as the hock.