The Dendritic Origins of Fast Prepotentials in Pyramidal Cells

  • Mark M. Millonas
  • Philip S. Ulinski


We used compartmental modeling of a pyramidal cell to examine the hypothesis that prepotentials originate in hot spots or localized regions of high sodium and potassium conductances in the dendritic tree. The full range of experimentally observed prepotentials could be reproduced using compartmental models by incorporating hot spots containing fast sodium conductances and delayed rectifier potassium conductances in densities that were high relative to conductance densities estimated in labs where prepotentials were not observed.


Pyramidal Cell Compartmental Model Dendritic Tree Potassium Conductance Apical Compartment 
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Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Mark M. Millonas
    • 1
  • Philip S. Ulinski
    • 1
  1. 1.James Franck Institute and Department of Organismal Biology and AnatomyThe University of ChicagoChicagoUSA

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