Abstract
The author reviews the effects of cortical lesions upon the ability of monkeys, cats, dogs and rats to discriminate differences in wt., texture, sound, smell, and intensity of light, upon responses to other kinds of visual detail than brightness, upon maze learning and other complex adaptations in rats, and upon still higher types of behavior in primates. Some kinds of learning can be mediated not only at cortical but also at subcortical levels; and complex behavior of certain kinds must depend upon the cortex as a whole, since it suffers as a consequence of cortical damage to a degree largely independent of the site and extent of the lesion. The literature in the field is not yet extensive .