Journal of Computational Neuroscience

, Volume 7, Issue 1, pp 5–15

Role of an A-Type K+ Conductance in the Back-Propagation of Action Potentials in the Dendrites of Hippocampal Pyramidal Neurons

  • M. Migliore
  • D.A. Hoffman
  • J.C. Magee
  • D. Johnston
Article

Abstract

Action potentials elicited in the axon actively back-propagate into the dendritic tree. During this process their amplitudes can be modulated by internal and external factors. We used a compartmental model of a hippocampal CA1 pyramidal neuron to illustrate how this modulation could depend on (1) the properties of an A-type K+ conductance that is expressed at high density in hippocampal dendrites and (2) the relative timing of synaptic activation. The simulations suggest that the time relationship between pre- and postsynaptic activity could help regulate the amplitude of back-propagating action potentials, especially in the distal portion of the dendritic tree.

computational model action potential back propagation KA conductance associative interactions 

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • M. Migliore
    • 1
  • D.A. Hoffman
    • 2
  • J.C. Magee
    • 3
  • D. Johnston
    • 2
  1. 1.National Research Council, Institute of Advanced Diagnostic MethodologiesPalermoItaly
  2. 2.Division of NeuroscienceBaylor College of MedicineHouston
  3. 3.Neuroscience CenterLouisiana State University Medical CenterNew Orleans

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