Abstract
In chronically isolated slabs of the cat auditory cortex with additional transection of lower layers and preservation of the structural integrity of one, two, or three upper layers of cortex just under the pial membrane, impulse responses of slab neurons to stimulation applied at the additionally undercut section were studied. High effectiveness of axodendritic and axospinal excitatory contacts formed by nerve elements of intracortical origin in upper cortical layers was demonstrated. The participation of geniculocortical fibers in spread of excitation in the cortex through synaptic contacts in layer I with dendrites of underlying-layer pyramidal neurons is discussed. The capacity for generation of polysynaptic excitation responses by the neurons indicates preservation of complex interneuronal interactions in the isolated cortex slab preparations with their undercut lower layers.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
Authors' certification 1358927 USSR, MKI A 61 V 5/00. V. D. Taranenko and V. É. Lopantsev, "Technique for investigating structural-functional connections in brain corts," Publication of December 15, 1987, Bulletin No. 46.
M. M. Bogoslovskii, M. M. Khananashvili, and É. G. Zarkeshev, "Neurophysiological characteristics of isolated structures of cerebral hemisphere cortex," Usp. Fiziol. Nauk,4, No. 2, 55–100 (1973).
É. G. Zarkeshev, Neuronal Mechanisms of Cortical Integration [in Russian], Nauka, Leningrad (1980).
K. Kashaiova, "Interaction of neurons in intact and neuronally isolated parietal associative brain cortex during direct electrical stimulation," Author's Abstract of Dissertaion for Candidate of Biological Sciences, Kishinev (1987).
A. P. Novozhilova and V. P. Babmindra, "Interneuronal connections of afferent-denervated islets of brain cortex," Dokl. Akad. Nauk SSSR,250, No. 5, 1245–1246 (1980).
I. Sentagotai, "Synaptology of brain cortex," in: Structure and Function of the Nervous System [in Russian], Meditsina, Moscow (1962), pp. 6–14.
F. N. Serkov, Electrophysiology of the Upper Regions of the Auditory System [in Russian], Naukova Dumka, Kiev (1977).
F. N. Serkov and E. D. Genis, "Quantitative and qualitative characteristics of synapses in different cortex layers," Neirofiziologiya,12, No. 2, 131–138 (1980).
V. D. Taranenko, "Inhibitory responses of neurons of the isolated slabs of cat brain auditory cortex to intracortical stimulation," Neirofiziologiya,16, No. 1, 42–49 (1984).
V. D. Taranenko, "Functional interaction of neurons in brain cortx," Fiziol. Zh.33, No. 1, 38–46 (1987).
V. D. Taranenko and T. Kh. Kir'yazova, "Spread of excitation in upper (I–III) layers of the isolated slabs of cat brain auditory cortex," Neirofiziologiya,20, No. 4, 546–553 (1988).
V. D. Taranenko, L. I. Semik, and M. A. Rabtsevich, "Initial inhibitory responses of neurons of the chronically isolated slabs of cat brain auditory cortex to intracortical stimulation," Neirofiziologiya,16, No. 2, 152–161 (1984).
M. Khananashvili, Neuronally Isolated Cortex [in Russian], Meditsina, Leningrad (1971).
Zh. P. Shuranova, Investigation of Elementary Functional Mechanisms of Cerebral Cortex in Mammalian Brain [in Russian], Nauka, Moscow (1977).
O. Creutzfeldt and G. Struck, "Neurophysiologie und Morphologie der chronisch isolierten cortexinsel der Katze: Hirnpotentiale und Neurontätigkeit einer isolierten Nervenzel-lpopulation ohne afferente Fasern," Arch. Psychiatr. Nervenkr.,203, No. 6, 708–731 (1962).
J. C. Eccles, "The horizontal (tangential) fibers system of lamina I of the cerebral neocortex," Acta Morphol. Acad. Sci. Hung.,31, No. 1/3, 261–284 (1983).
J. E. Gruner, J. C. Hirsch, and C. Sotelo, "Ultrastructural features of the isolated suprasylvian gyrus in the cat," J. Comp. Neurol.,154, No. 1, 1–28 (1974).
A. Mitani, M. Shimokouchi, K. Itoh, et al., "Morphology and laminar organization of electrophysiologically identified neurons in the primary auditory cortex in the cat," J. Comp. Neurol.,235, No. 4, 430–447 (1985).
S. Watanabe and H. Yuasa, "Neuronal activity in the isolated slabs of the cat." Jpn. J. Physiol.,20, No. 6, 673–682 (1970).
J. A. Winer, "Structure of layer II in cat primary auditory cortex (AI)," J. Comp. Neurol.,238, No. 1, 10–37 (1985).
Additional information
I. I. Mechnikov State University of Odessa, Odessa. Translated from Neirofiziologiya, Vol. 23, No. 1, pp. 80–87, January–February, 1991.
Rights and permissions
About this article
Cite this article
Kir'yazova, T.K., Taranenko, V.D. & Semik, L.I. Spread of excitation in upper layers of the cat auditory cortex with participation of intracortical interneuronal connections. Neurophysiology 23, 67–73 (1991). https://doi.org/10.1007/BF01052292
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01052292