[The retinotopic organization of the posterior suprasylvian area of the cerebral cortex in the cat]. / Retinotopicheskaia organizatsiia zadnei suprasil'vievoi oblasti kory mozga koshki.

Posterior suprasylvian area (PSA) is one of the extrastriate visual structures of the cat cortex. Representation of the visual field in the PSA has been investigated by the mapping method. Results of experiments revealed that receptive fields (RF) of the PSA neurons were located mostly in the upper contralateral quadrant of the visual field. About 10% of RF were located in the upper ipsilateral quadrant of the visual field. In the upper PSA (21a, 21b) area centralis is mainly represented including the space of the radius of 20-30 degrees of the visual field. In the lower PSA (20a, 20b) more peripheral part of the visual field was represented. The experiments did not confirm essential differences in the retinotopic organization between areas 20a and 20b, 21a and 21b. Proceeding from the presented experiments the suggestion is put forward that PSA consists of two main areas (21 and 20) without dividing into subareas.