Functional specifics of cortical associative regions participating in learning to differentiate visual information in monkeys

In 3 groups of monkeys: intact, those with their 7th field bilaterally removed, and those with bilateral removal of the sulcus principalis, functional specifics of the cortex' associative areas were studied. Removal of the 7th field practically does not affect processes of training for images with such features as spatial frequency, colour, and images of animals, but considerably impairs the learning characteristics in visual differentiation of objects' size and spatial interrelationships among objects. Removal of the sulcus principalis considerably impairs the characteristics of differentiation of objects' size and spatial interrelationships among them, as well as differently coloured stimuli. In both these groups, the stable motor response term and the probability of refusal increase. The data obtained suggest that the sensory processing results in forming a few (at least three) functional visual informational flows with which different cortical areas operate.