Neurophysiology

, Volume 20, Issue 4, pp 410–415 | Cite as

Spread of excitation in the upper layers (I–III) in an auditory cortex slab isolated from the cat

  • V. D. Taranenko
  • T. Kh. Kir'yazova
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Abstract

Research was performed on an auditory cortex slab isolated from unanesthetized immobilized cats after severing of the lower layers, preserving intact a “bridge” one, two, or three upper cortical layers under the pial membrane; the spike response of neurons on this slab to stimuli applied at the other side of this additional incision was observed. It was found that stimulation applied to level IV produces an excitatory wave which spreads to the upper cortical layers, leading to mono- and polysynaptic activation of neurons at all levels via the apical dendrite of pyramidal cells. Antidromic activation of layer IV neurons together with an especially high proportion of monosynaptic response was observed with the three upper cortical layers remaining intact. A possibly crucial role in the horizontal spread of excitation within the cerebral cortex of a major bundle of axons from cortical interneurons is discussed in this article.

Keywords

Crucial Role Cerebral Cortex Lower Layer Pyramidal Cell Auditory Cortex 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • V. D. Taranenko
  • T. Kh. Kir'yazova

There are no affiliations available

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