A model of unitary responses from A/C and PP synapses in CA3 pyramidal cells (Baker et al. 2010)

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Accession:137259
The model was used to reproduce experimentally determined mean synaptic response characteristics of unitary AMPA and NMDA synaptic stimulations in CA3 pyramidal cells with the objective of inferring the most likely response properties of the corresponding types of synapses. The model is primarily concerned with passive cells, but models of active dendrites are included.
Reference:
1 . Baker JL, Perez-Rosello T, Migliore M, Barrionuevo G, Ascoli GA (2011) A computer model of unitary responses from associational/commissural and perforant path synapses in hippocampal CA3 pyramidal cells. J Comput Neurosci 31:137-58 [PubMed]
Model Information (Click on a link to find other models with that property)
Model Type: Synapse; Dendrite;
Brain Region(s)/Organism: Hippocampus;
Cell Type(s): Hippocampus CA3 pyramidal GLU cell;
Channel(s):
Gap Junctions:
Receptor(s): AMPA; NMDA;
Gene(s):
Transmitter(s): Glutamate;
Simulation Environment: NEURON;
Model Concept(s):
Implementer(s): Baker, John L [jbakerb at gmu.edu];
Search NeuronDB for information about:  Hippocampus CA3 pyramidal GLU cell; AMPA; NMDA; Glutamate;
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ca3-synresp
readme.html
cacumm.mod
cagk.mod *
cal2.mod *
can2.mod *
cat.mod *
distr.mod
exp2nmdar.mod
h.mod *
kadist.mod *
KahpM95.mod *
kaprox.mod *
kd.mod *
kdrca1.mod *
km.mod *
na3n.mod *
ama-c30573.CNG.hoc
ama-c31162.CNG.hoc
ama-c60361.CNG.hoc
ama-c62563.CNG.hoc
ama-c73164.CNG.hoc
ama-c81463.CNG.hoc
axon-common.hoc
bar-cell1zr.CNG.hoc
bar-cell2zr.CNG.hoc
bar-cell3zr.CNG.hoc
bar-cell4zr.CNG.hoc
bar-cell5zr.CNG.hoc
bar-cell6zr.CNG.hoc
bar-cell7zr.CNG.hoc
bar-cell8zr.CNG.hoc
demo.hoc
demo.png
demo.ses
demo-fig2a-raw-data.csv
demo-fig2a-raw-time.csv *
demo-fig2a-smoothed-data.csv
demo-fig2a-smoothed-time.csv *
mosinit.hoc
out-vc-ampar-c31162-ad67-022.csv
out-vc-ampar-c62563-ad2-01667.csv
out-vc-ampar-c62563-ad54-054.csv
out-vc-fastampar-c62563-ad2-01667.csv
out-vc-nmdar-c81463-ad87-082.csv
out-vc-nmdar-l51-ad7-036.csv
params-by-fig.csv
synresp.hoc
synresp-c30573.hoc
synresp-c31162.hoc
synresp-c60361.hoc
synresp-c62563.hoc
synresp-c73164.hoc
synresp-c81463.hoc
synresp-cell1zr.hoc
synresp-cell2zr.hoc
synresp-cell3zr.hoc
synresp-cell4zr.hoc
synresp-cell5zr.hoc
synresp-cell6zr.hoc
synresp-cell7zr.hoc
synresp-cell8zr.hoc
synresp-l24b.hoc
synresp-l51.hoc
synresp-l56a.hoc
tur-l24b.CNG.hoc
tur-l51.CNG.hoc
tur-l56a.CNG.hoc
                            
COMMENT
	calcium accumulation into a volume of area*depth next to the
	membrane with a decay (time constant tau) to resting level
	given by the global calcium variable cai0_ca_ion
	Modified to include a resting current (irest) and peak value
	(cmax)
	i is a dummy current needed to force a BREAKPOINT
ENDCOMMENT

NEURON {
	SUFFIX cacum
	USEION ca READ ica WRITE cai
	NONSPECIFIC_CURRENT i
	RANGE depth, tau, cai0, cmax
}

UNITS {
	(mM) = (milli/liter)
	(mA) = (milliamp)
	F = (faraday) (coulombs)
}

PARAMETER {
	depth = 0.1 (um)	: assume volume = area*depth
	irest = 0  (mA/cm2)		: to be initialized in hoc	
	tau = 100 (ms)
	cai0 = 50e-6 (mM)	: Requires explicit use in INITIAL
			: block for it to take precedence over cai0_ca_ion
			: Do not forget to initialize in hoc if different
			: from this default.
}

ASSIGNED {
	ica (mA/cm2)
	cmax
	i  	 (mA/cm2)
}

STATE {
	cai (mM)
}

INITIAL {
	cai = cai0

: avoid initializing irest automatically to
: prevent cai from going negative when using
: hyperpolarizing voltage or current clamp.
: JLB 2008-12-17
:	irest = ica
	cmax=cai
}

BREAKPOINT {
	SOLVE integrate METHOD derivimplicit
	if (cai>cmax) {cmax=cai}
	i=0
}

DERIVATIVE integrate {
	cai' = (irest-ica)/depth/F/2 * (1e4) + (cai0 - cai)/tau
}

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