[Image discrimination after extirpation of the striatal or the lateral suprasylvian areas of the cerebral cortex in the cat].

Selective lesion of the cat striatal cortex lowered the visual acuity although the figure discrimination only became worse in differentiating among certain shapes differing from each other in their high frequency harmonic components of the image's spatial--frequency range. Lesion of the lateral suprasylvian area leaves the visual acuity intact but disturbs differentiation of all images. The data obtained are compatible with previously stated suggestion that rather local and mainly high--frequency description of images occurs in the striatal cortex whereas a more global and mainly low-frequency one takes place in the lateral suprasylvian area.