| Abstract: | To study the possible pathways along which visual signals reach a visual zone discovered by the writers in the cat frontal cortex in the ventral bank of the cruciate sulcus, horseradish peroxidase was injected into a site previously identified by physiological experiments. Stained neurons were discovered in visual areas of the cortex (lateral suprasylvian and ectosylvian), in the parietal cortex (areas 5 and 7), and also in small numbers in the prefrontal and limbic cortex. Stained neurons were found in the following nuclei in the thalamus: n. medialis dorsalis, intralaminar nuclei (nn. centralis lateralis, paracentralis, centralis medialis), nn. ventralis medialis, anteromedialis, and reuniens. Many stained neurons were found in the claustrum and a few in the substantia grisea centralis in the midbrain. The principal sources of inputs to the cortical area investigated are thus centers of the visual system or parts of the brain directly connected with it.Institute for Problems in Information Transmission, Academy of Sciences of the USSR, Moscow. Brain Institute, All-Union Mental Health Research Center, Academy of Medical Sciences of the USSR, Moscow. Translated from Neirofiziologiya, Vol. 17, No. 1, pp. 43–49, January–February, 1985. |
