FEATURES OF RATS CEREBRAL-CORTEX LASHLEY ZONE FUNCTIONAL TOPOLOGY IN COMPLICATED VISUAL-STIMULI DISCRIMINATION TASK UNDER ALTERNATIVE CHOICE CONDITIONS

In the result of our investigation it was determined: a) The ability t o discriminate the complicated visual stimuli in rats depends on small part of occipital region of cerebral cortex critically. This is ''Las hley zone''. b) The location of this part of the cortex is the border between Ocl (17 field) and Oc2.1 (18a field), that and disagrees with the location of it. Lashley's ''c'' and ''b'' fields, although it incl udes largest part of ''b'' field.; c) The extirpation of this part of cerebral cortex leads to the irreversible loss of visual discriminatio n skill. But the control experiments demonstrated, that the ability to the keen visual differentiation and motor component of conditioned re flex were maintained.