ABSTRACT
The opto-striate central ganglions of each lobe may be ideally conceived as occupying the centre of a hollow sphere, of which the circumference is represented by the undulations of the cerebral cortex; and the white fibres would thus represent an infinite number of radii uniting the central with the peripheral regions of the sphere. Experimental physiology has proved on its side, that in living animals, as the beautiful experiments of Flourens long ago showed, it is possible, by methodically removing successive slices of the cerebral substance, to cause these animals reciprocally to lose either the faculty of perceiving visual, or that of perceiving auditory-impressions. Anatomy shows, then, that there are definite localizations of limited regions, organically designed to receive, to condense, and to transform such or such particular kinds of sensorial impressions. As soon as the sensorial excitation is dispersed in the midst of the plexuses of the cerebral cortex, new phenomena unfold themselves.
