[Changes in the dendritic organization of the neurons of the isolated visual cortex of the cat].
The cortex of one hemisphere in cats was isolated according to M.M. Khananashwili method by means of surgical section of its projection fibres which connect it with subcortical structures. In five cats of means of Nissl's method the neuronal status of different cortical layers in the field 17 was studied during long postoperative terms (from 9 months up to 2 years). In 9 cats the neurons of the same field were impregnated after Golgi-Bubenett method and studied during the same postoperative terms. Cytological investigation in the majority of neurons did not reveal any pathologic changes during different postoperative terms up to one year. In two years, slight neuronal changes were noted presented in poor staining and vacuolization of cytoplasm. As a result of deafferentation performed shortening and thickness of dendritic branching was noted, as well as decrease in the number of thorns of large pyramids in layers III, IV, and V of the isolated cortex. Dendrites and thorns in small and medium-sized pyramids in layers II, III, IV, V, and VI were preserved to a great extent. It is possible to conclude, on the fact of thorns preserving in the major number of the neurons, that the neocortex possesses an enormous intracortical connective system that is responsible for the high degree of functional neuronal activity in the isolated cortex.
D000818:Animals; D002415:Cats; D003712:Dendrites / Q000502:physiology; D013194:Staining and Labeling / Q000379:methods; D014793:Visual Cortex / Q000166:cytology* / Q000502:physiology
Izmeneniia dendritnoĭ organizatsii neĭronov zritel'noĭ oblasti neĭronal'no-izolirovannoi kory polusharii bol'shogo mozga koshki.