[Associative connections of the visual area of the neuronally-isolated cat cortex]

The associative pathways of the visual zone (fields 17 and 18) of the neuronal-isolated cortex of the cat were studied by the methods of Nauta-Gygax and Fink-Heimer. The cortex was isolated by the method proposed by M. M. Khananashvili (1961) by means of transection of projectional systems of the fibres connecting the cortex with subcortical structures in the site of their maximum concentration-in the internal capsule. Fields 17 and 18 were shown to have short associative pathways running both within the limits of the fields proper and to fields 17, 7 and to Clara-Bishop region disposed in the depth of the suprasylvian fissure. The site of termination of the associative libres was all layers of the cortex in some degree. It is assumed that the cytoarchitectonical fields in the neuronal-isolated cortex during conditioning interacts by means of intracortical fibres shown in the present investigation.