Cortical Layer 5b pyr. cell with [Na+]i mechanisms, from Hay et al 2011 (Zylbertal et al 2017)

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" ... Based on a large body of experimental recordings from both the soma and dendrites of L5b pyramidal cells in adult rats, we characterized key features of the somatic and dendritic firing and quantified their statistics. We used these features to constrain the density of a set of ion channels over the soma and dendritic surface via multi-objective optimization with an evolutionary algorithm, thus generating a set of detailed conductance-based models that faithfully replicate the back-propagating action potential activated Ca(2+) spike firing and the perisomatic firing response to current steps, as well as the experimental variability of the properties. Furthermore, we show a useful way to analyze model parameters with our sets of models, which enabled us to identify some of the mechanisms responsible for the dynamic properties of L5b pyramidal cells as well as mechanisms that are sensitive to morphological changes. ..."
1 . Hay E, Hill S, Schürmann F, Markram H, Segev I (2011) Models of neocortical layer 5b pyramidal cells capturing a wide range of dendritic and perisomatic active properties. PLoS Comput Biol 7:e1002107 [PubMed]
2 . Zylbertal A, Yarom Y, Wagner S (2017) The Slow Dynamics of Intracellular Sodium Concentration Increase the Time Window of Neuronal Integration: A Simulation Study Front. Comput. Neurosci. 11(85):1-16 [PubMed]
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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: Neocortex;
Cell Type(s): Neocortex L5/6 pyramidal GLU cell;
Channel(s): Na/Ca exchanger; Na/K pump; I Sodium;
Gap Junctions:
Simulation Environment: NEURON;
Model Concept(s): Dendritic Action Potentials; Detailed Neuronal Models; Action Potentials; Reaction-diffusion; Synaptic Plasticity; Active Dendrites; Olfaction;
Implementer(s): Zylbertal, Asaph [asaph.zylbertal at];
Search NeuronDB for information about:  Neocortex L5/6 pyramidal GLU cell; I Sodium; Na/Ca exchanger; Na/K pump;
L5PCbiophys1.hoc *
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// Author: Etay Hay, 2011
//    Models of Neocortical Layer 5b Pyramidal Cells Capturing a Wide Range of
//    Dendritic and Perisomatic Active Properties
//    (Hay et al., PLoS Computational Biology, 2011) 
// Model of L5 Pyramidal Cell, constrained for Current Step Firing

begintemplate L5PCbiophys
public biophys

proc biophys() {
	forsec $o1.all {
	  insert pas
		cm = 1
		Ra = 100
		e_pas = -90

  forsec $o1.somatic {
	  insert Ca_LVAst 
	  insert Ca_HVA 
	  insert SKv3_1 
	  insert SK_E2 
	  insert K_Tst 
	  insert K_Pst 
	  insert Nap_Et2 
	  insert NaTa_t
		insert CaDynamics_E2
		insert Ih
		ek = -85
		ena = 50
		gIhbar_Ih = 0.0002
    g_pas = 0.0000408 
  	decay_CaDynamics_E2 = 376.0 
  	gamma_CaDynamics_E2 = 0.000591 
  	gCa_LVAstbar_Ca_LVAst = 0.00977 
  	gCa_HVAbar_Ca_HVA = 0.000506 
  	gSKv3_1bar_SKv3_1 = 0.497 
  	gSK_E2bar_SK_E2 = 0.0548 
  	gK_Tstbar_K_Tst = 0.0565 
  	gK_Pstbar_K_Pst = 0.0236 
  	gNap_Et2bar_Nap_Et2 = 0.00268 
  	gNaTa_tbar_NaTa_t = 2.08 

	forsec $o1.apical {
		cm = 2
		insert Ih
  	insert SK_E2 
  	insert Ca_LVAst 
  	insert Ca_HVA 
  	insert SKv3_1 
  	insert NaTa_t 
  	insert Im 
  	insert CaDynamics_E2
		ek = -85
		ena = 50
    decay_CaDynamics_E2 = 22.3 
    gamma_CaDynamics_E2 = 0.00759 
    gSK_E2bar_SK_E2 = 0.00553 
  	gSKv3_1bar_SKv3_1 = 0.0238 
  	gNaTa_tbar_NaTa_t = 0.0165 
  	gImbar_Im = 0.000786 
  	g_pas = 0.0000602 
  forsec $o1.basal {
		cm = 2
		insert Ih
		gIhbar_Ih = 0.0002
  	g_pas = 0.0000788 

  forsec $o1.axonal {
  	g_pas = 0.0000341 

endtemplate L5PCbiophys