CA1 pyramidal neuron: synaptically-induced bAP predicts synapse location (Sterratt et al. 2012)

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Accession:144490
This is an adaptation of Poirazi et al.'s (2003) CA1 model that is used to measure BAP-induced voltage and calcium signals in spines after simulated Schaffer collateral synapse stimulation. In the model, the peak calcium concentration is highly correlated with soma-synapse distance under a number of physiologically-realistic suprathreshold stimulation regimes and for a range of dendritic morphologies. There are also simulations demonstrating that peak calcium can be used to set up a synaptic democracy in a homeostatic manner, whereby synapses regulate their synaptic strength on the basis of the difference between peak calcium and a uniform target value.
Reference:
1 . Sterratt DC, Groen MR, Meredith RM, van Ooyen A (2012) Spine calcium transients induced by synaptically-evoked action potentials can predict synapse location and establish synaptic democracy. PLoS Comput Biol 8:e1002545 [PubMed]
Model Information (Click on a link to find other models with that property)
Model Type: Neuron or other electrically excitable cell;
Brain Region(s)/Organism:
Cell Type(s): Hippocampus CA1 pyramidal cell;
Channel(s): I Na,t; I L high threshold; I T low threshold; I A; I K; I M; I Mixed; I R; I_AHP;
Gap Junctions:
Receptor(s): AMPA; NMDA;
Gene(s):
Transmitter(s):
Simulation Environment: NEURON;
Model Concept(s): Dendritic Action Potentials; Synaptic Plasticity;
Implementer(s): Sterratt, David ; Groen, Martine R [martine.groen at gmail.com];
Search NeuronDB for information about:  Hippocampus CA1 pyramidal cell; AMPA; NMDA; I Na,t; I L high threshold; I T low threshold; I A; I K; I M; I Mixed; I R; I_AHP;
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bpap
CA1_multi
template
BasalPath.hoc *
EPSPTuning.hoc *
ExperimentControl.hoc *
load_templates.hoc *
ObliquePath.hoc *
RangeRef.hoc *
SynapseBand.hoc *
                            
// This template creates the Basal Path lists, starting from the
// section attached to the trunk and ending with the basal tip section 
// written by Terrence Brannon, modified by Yiota Poirazi, July 2001, poirazi@LNC.usc.edu

begintemplate ObliquePath

public dtrunk_to_tip, trunk_section, root_oblique

strdef sexec

objref trunk_section
strdef trunk_section_name

objref root_oblique
strdef root_oblique_name

objref tip_section
strdef tip_section_name

objref oblique_path

proc init () {
  sec_count=0

  forsec $o1 {

    if (sec_count==1) {
       root_oblique    = new SectionRef()
       root_oblique_name=secname()
    }
      
    if (!sec_count) {
       distance(0,1)
       trunk_section  = new SectionRef()
       trunk_section_name=secname()
      }
    sec_count=sec_count+1

    tip_section    = new SectionRef()
    tip_section_name=secname()
  }

  access root_oblique.sec
  distance(0,0)
  access tip_section.sec
  dtrunk_to_tip=distance(1,1)

//  printf("ObliquePath trunk_section: %s root_oblique: %s tip_section: %s distance between root_oblique and tip_section: %g\n", trunk_section_name, root_oblique_name, tip_section_name, dtrunk_to_tip)
}

endtemplate ObliquePath

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