It runs posteriorly along the cerebral peduncle passing the crural and ambient cisterns. The slime glands themselves are probably modified crural glands. The spurs are connected to the venom-producing crural glands, forming the crural system. Crural bases are small and relatively thin, non-feathered crura. The medial crural cutaneous branches of saphenous nerve provide cutaneous innervation to the medial leg.