On the integration of subthreshold inputs from Perforant Path and Schaffer Collaterals in hippocampal CA1 pyramidal neurons

J Comput Neurosci. Mar-Apr 2003;14(2):185-92. doi: 10.1023/a:1021906818333.

Abstract

Using a realistic model of a CA1 hippocampal pyramidal neuron, we make experimentally testable predictions on the roles of the non-specific cation current, I(h), and the A-type Potassium current, I(A), in modulating the temporal window for the integration of the two main excitatory afferent pathways of a CA1 neuron, the Schaffer Collaterals and the Perforant Path. The model shows that the experimentally observed increase in the dendritic density of I(h) and I(A) could have a major role in constraining the temporal integration window for these inputs, in such a way that a somatic action potential (AP) is elicited only when they are activated with a relative latency consistent with the anatomical arrangement of the hippocampal circuitry.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Action Potentials / physiology
  • Animals
  • Computer Simulation
  • Dendrites / physiology
  • Excitatory Postsynaptic Potentials / physiology
  • Hippocampus / cytology
  • Hippocampus / physiology*
  • Models, Neurological*
  • Neural Pathways / physiology
  • Neurons / physiology*
  • Perforant Pathway / physiology*
  • Synaptic Transmission
  • Time Factors