[Spatial organization and interrelation of structural elements of the 1st layer of the neocortex].
Investigating topography and structure of elements in the layer I of the fields 4, 3, 1 of the human neocortex (4 cases) and M1, Ep zones in the cat neocortex (5 cases) by means of modified methods of Golgi, Peters and Kluver-Barerr, it became possible to work out an original classification of astrocytes and to reveal the neurono-glio-vascular complexes consisting of the neuronal base and two glial-vascular links. Three main varieties of protoplasmic astrocytes are determined: short-rayed with a long dendrite-like process, short-rayed cap-like and long-rayed with a double bush of branchings. In the latter forms axon-like processes are revealed, some of them make complex basket-like branchings and each of them surrounds a group of neuronal bodies, predominantly the pyramidal ones in the layer III. Distribution of the marginal glia and the three mentioned varieties of astrocytes is subjected to a single plan. The raws of gliocytes along the horizontal and vertical lines are connected with each other and with the neuronal elements. Peculiar receptive apparatuses performing interrelation are ball-like formations revealed on the apical dendrites of the pyramidal neurons. The information that gets into them is processed automatically. Problems concerning the importance of the ball-like formations in integration of the layer I is discussed, and the role of the glial cells with axon-like processes in the active transport of various substances and in regulating metabolism of the pyramidal cells of the layer III is also dealt with.
D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000033:anatomy & histology* / Q000166:cytology; D003712:Dendrites / Q000648:ultrastructure; D006801:Humans; D009413:Nerve Fibers, Myelinated / Q000648:ultrastructure; D009457:Neuroglia / Q000166:cytology; D009474:Neurons / Q000166:cytology
Prostranstvennaia organizatsiia i vzaimootnoshenie strukturykh élementov I sloia neokorteksa.