Electrophysiological Studies of the Cutaneous Innervation of the External Genitalia of the Male Dog

The external genitalia and perineum of the male dog receive cutaneous innervation from the caudal cutaneous femoral, superficial perineal and genitofemoral nerves and the dorsal nerve of the penis. In addition the cranial and caudal iliohypogastric nerves occasionally supply the prepuce. Considerable overlaop between adjacent cutaneous areas, particularly on the prepuce, is noted and the extent of all cutaneous areas is greater and more expansive than previosly described. Only the cutaneous area of the genitofemoral nerve is reduced from earlier accounts, being restricted to the prepuce, inguinal region, and medial thigh but never supplying the scrotum.