[Functional reorganizations of the neuronal structures of the cat associative cortex after total sectioning of the corpus callosum].
In given work results of researches functional organization of neural networks at associative cortex level in intact and after total corpus callosum section (Cc sec) of cat's brain. In result of the given researches is established, that after total Cc sec the brain is exposed significant morphological and functional changes. Is shown, that Cc sec is accompanied by infringements in act of reception of food and head orientation of the animal in space. A configuration and characteristics varies conducting ways, opportunity of an exchange the information between is lost by hemispheres, and accordingly, to receive the information from ipsilateral hemifield of vision. The structural and functional characteristics vary of neural structures of both hemispheres: asymmetry of hemispheres in size disappears, orientational and directional characteristics and decreases number of subzones in receptive fields (RF). In RF of this area occur extensive inhibitory zones. Arrangements RF in vision field main borrows contralateral hemifield of vision, in intact a brain large part RF pass in ipsilateral hemifield of vision. Thus in result of these researches is established, that the majority of neural functions of left and right hemispheres at level associative cortex, revealed on intact brain are formed for account transcallosal of connections. In conditions of isolated functioning both hemispheres there are the changes as in ways of the information processing, and in complementary ways of display of space. In result callosotomy of neuron networks in both hemispheres undergo essential changes: the hemispheres lose ability to integrate the set of the parties of subjects, disturbed an opportunity of invariant the descriptions of images, hence the description of the space information occurs on separate attributes of this information.
Gabibov
I M
IM
Pavlov Institute of Physiology, St.-Petersburg.
Solnushkin
S D
SD
D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology*; D003337:Corpus Callosum / Q000502:physiology* / Q000601:surgery; D004292:Dominance, Cerebral / Q000502:physiology; D008839:Microelectrodes; D009474:Neurons / Q000502:physiology*; D010775:Photic Stimulation; D011984:Sensory Receptor Cells / Q000502:physiology; D013037:Spatial Behavior / Q000502:physiology; D014794:Visual Fields / Q000502:physiology