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Reentrant signaling among simulated neuronal groups leads to coherency in their oscillatory activity

Academic Article
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Overview

authors

  • Sporns, O.
  • Gally, J. A.
  • Reeke, G. N.
  • Edelman, Gerald

publication date

  • September 1989

journal

  • Proceedings of the National Academy of Sciences of the United States of America  Journal

abstract

  • Recent experiments have revealed tightly synchronized oscillatory discharges in local assemblies of cortical neurons as well as phase coherency of oscillations at distant cortical sites. These findings are consistent with the theory of neuronal group selection, a population theory of brain function that is based on the properties of local groups of neurons. A set of computer simulations shows that cooperative interactions within and among neuronal groups can generate the observed phenomena. In the simulations, oscillations within neuronal groups are generated through local excitatory and inhibitory interactions. Different groups in general oscillate in an uncorrelated fashion. Coherency of the oscillatory activity of different neuronal groups depends crucially on reciprocal reentrant signaling and can reflect the spatial continuity of a stimulus. Separated or discontinuous features of a given stimulus can be transiently associated in a temporally coherent pattern through reentrant signaling between groups in networks responding to different aspects of that stimulus. A simulation of reentrant activity between arrays of neuronal groups selective for oriented lines and pattern motion displays cross-correlations between groups that are responsive to different parts of a stimulus contour if these parts move together. Such coherency among neuronal groups might be used in the discrimination of a stimulus from other stationary or differentially moving elements in a visual scene.

subject areas

  • Animals
  • Cell Communication
  • Electric Stimulation
  • Geniculate Bodies
  • Mathematics
  • Models, Neurological
  • Neurons
  • Oscillometry
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Identity

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.86.18.7265

PubMed ID

  • 2780571
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Additional Document Info

start page

  • 7265

end page

  • 7269

volume

  • 86

issue

  • 18

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