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Dendritic I h Selectively Blocks Temporal Summation of Unsynchronized Distal Inputs in CA1 Pyramidal Neurons

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Abstract

The active dendritic conductances shape the input-output properties of many principal neurons in different brain regions, and the various ways in which they regulate neuronal excitability need to be investigated to better understand their functional consequences. Using a realistic model of a hippocampal CA1 pyramidal neuron, we show a major role for the hyperpolarization-activated current, I h , in regulating the spike probability of a neuron when independent synaptic inputs are activated with different degrees of synchronization and at different distances from the soma. The results allowed us to make the experimentally testable prediction that the I h in these neurons is needed to reduce neuronal excitability selectively for distal unsynchronized, but not for synchronized, inputs.

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Authors and Affiliations

  1. Department of Neurobiology, Yale University School of Medicine, New Haven, CT, USA

    M. Migliore

  2. Institute of Biophysics, National Research Council, Palermo, Italy

    M. Migliore

  3. Department of Psychology, University of Palermo, Palermo, Italy

    L. Messineo & M. Ferrante

Authors
  1. M. Migliore
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  2. L. Messineo
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  3. M. Ferrante
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Migliore, M., Messineo, L. & Ferrante, M. Dendritic I h Selectively Blocks Temporal Summation of Unsynchronized Distal Inputs in CA1 Pyramidal Neurons. J Comput Neurosci 16, 5–13 (2004). https://doi.org/10.1023/B:JCNS.0000004837.81595.b0

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  • DOI: https://doi.org/10.1023/B:JCNS.0000004837.81595.b0

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