Organization of the rodent superior colliculus: some comparisons with other mammals.

The sensory and motor organization of the superior colliculus has been studied in a variety of mammalian species including rodent, lagomorph, carnivore and primate. Despite differences in the phyletic levels and ecological niches of these species, their colliculi show fundamental organizational similarities. It is suggested that these similarities reflect the retention of an organizational scheme which antedates the radiation of early mammals.