alcohol = 0 // IF THIS IS SET TO 1 THEN WE IMPLEMENT THE ALCOHOL PUMP DECLINE
// Note that for alcohol experiments you need to set km of pump.mod to be 12 instead of 40
multiple = 1 // this is a single parameter that can affect the rate of decline. But is more complicated than this though, so take a look at code below.
create soma
create Couple
soma {nseg=1 L=22 diam=22 }
length = 529.29
diamax = 4311.37/(3.14*length)
diamax_2 = sqrt(diamax)
diamax_3 = diamax_2 * 2
Couple {nseg=1 L= length diam= diamax_3 } // rallbranch=1}
access soma
soma connect Couple(0),1
// length = 529.29, DIAMETER = 3.22
// DO NOT GET CONFUSEd WITH RADIUS AND DIAMETER
a=0
forall for (x) a += area(x)
corrD = 42310/a
// global_ra = 250
// set_ra()
access soma
soma {
cm = 0.8
insert narsg // Na current. Resurgent. Markov model
insert hpkj // Ih hyperpolarisation activated cation current
insert bkpkj // BK ca2+ dependent K+ current
insert cadiff // calcium diffusion
insert kpkj
insert kpkj2
insert kpkjslow
insert captain // P type ca. P type calcium current
gbar_narsg = 0.156
ghbar_hpkj = 0.00104
gkbar_bkpkj = 0.0728
gkbar_kpkj = 0.0416
gkbar_kpkj2 = 0.0208
gkbar_kpkjslow = 0.0416
pcabar_captain = 0.00052 // 0.00005
insert lkpkj // leak current
e_lkpkj = -70
g_lkpkj = 0.0001
ena = 60
ek = -88
// -------------------
insert pump
km_pump = 40 // Michaelis-Menten
n_pump = 1
decline_pump = alcohol // If this is set to 1 then we switch on the oubain/alcohol pump decline system
initialdensity_pump = 1 // this is the density before the decline or the fixed density if no decline is chosen
red_pump = 0 // this is the lag before the decline takes place
lex_pump = 70 * multiple // this sets the speed of the decline
// -------------------
insert nadifl D_nadifl = 0.60
tau_nadifl = 5000
insert myexchangersoma
//----------------------
insert mypumpsoma
decline_mypumpsoma = alcohol // If this is set to 1 then we switch on the oubain/alcohol pump decline system
initialdensity_mypumpsoma = 0.5 // this is the density before the decline or the fixed density if no decline is chosen
red_mypumpsoma = 50000 // this is the lag before the decline takes place
lex_mypumpsoma = 200 * multiple // this sets the speed of the decline
green_mypumpsoma = 50000 // this is the lag before the second rate of decline takes place
lux_mypumpsoma = 200 * multiple // this sets the speed of the second set of decline
//----------------------
insert gkca
gkbar_gkca = 0.01
}
Couple {
cm=0.8 * corrD
insert cha gkhbar_cha = 0.00028914405 * corrD // Ih hyperpolarisation activated cation current. CHANGED NAME
insert leak
gl_leak = (7.93319415*10^-5) * corrD
el_leak = -80
nab = 0.036 // KD
ruti = 0.032 // KA
tt = 0.001 // Whalter Kv1.1 (or maybe kv1.2)
insert cap2 cai = 4e-5 cao = 2.4 gcabar_cap2 = 0.0016 * corrD
insert cat cai = 4e-5 cao = 2.4 gcabar_cat = 0.0006 * corrD
insert cae cai = 4e-5 cao = 2.4 gcabar_cae = 0.0032 * corrD
insert khh gkbar_khh = 0.00024 * corrD
insert km gkbar_km = 0.000004 * corrD
insert ka gkbar_ka = ruti * corrD
insert kd gkbar_kd = nab * corrD
insert kc3 gkbar_kc3 = 0.06 * corrD
insert k23 gkbar_k23 = 0.000156 * corrD
insert cad taur_cad = 2 cainf_cad = 4e-5
kt_cad = 4e-5 kd_cad = 4e-5
depth_cad = 0.1 * corrD
insert kv1
gbar_kv1 = tt * corrD
insert kdyn
KAF_kdyn = 0.0119 // bursts at 5,149
// 0.01 - no bursts // 0.012 - bursts at 5000 // 0.013 bursts at around 3,500 // 0.015 bursts at around 2,500 // 0.02 - bursts at around 1000
// OLD: 0.1428571428571 // 0.008 // 0.011 // (~50:50)
// OLD: IN FULL MODEL IS 0.143, IN 40 COMPARTMENT IS 0.033, IN 5 COMPARTMENT IS 0.02. IN 2 COMPARTMENT IS 0.008 (BUT if Ra = 250+length = 240, it is 0.0055)
dep_kdyn = 70e-3 // Have not applied corrD to the depth
peak_kdyn = 3.03 // peak value of extracellular K concentration (because of buffering system)
insert myexchanger
ImaxNax_myexchanger = 0.00208768267 * corrD
//----------------------
insert mypump
decline_mypump = alcohol // If this is set to 1 then we switch on the oubain/alcohol pump decline system
initialdensity_mypump = 0.00208768267 * corrD // this is the density before the decline or the fixed density if no decline is chosen
red_mypump = 50000 // this is the lag before the decline takes place
lex_mypump = 200 * multiple // this sets the speed of the decline
//----------------------
insert newnew
km_newnew = 2.245
n_newnew = 1
decline_newnew = alcohol // If this is set to 1 then we switch on the oubain/alcohol pump decline system
initialdensity_newnew = 0.0010438413 * corrD // this is the density before the decline or the fixed density if no decline is chosen
red_newnew = 50000 // this is the lag before the decline takes place
lex_newnew = 200 * multiple // this sets the speed of the decline
//----------------------
// YOUR OWN ERG CURRENT (sequential, Hodgkin-Huxley)
insert erg
gbar_erg = 0 * corrD // 0.01, 0.03 too small 0.1 does it, 0.05 does it. (with vhalf = -5)
vhalf_erg = -5 // - 35 is the default, but you could legitimately change this to -5 because it is -5 with physiological levels of external calcium
// (external calcium allosterically effects the channel)
}
// ------------------------------------
// Some global stuff.
// ------------------------------------
celsius = 36
// ------------------------------------
// Synapses
// ------------------------------------
// inix = 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
inix = 0
// enux = 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
enux = 0
// paranux = 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
paranux = 0
// basket_nux = 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
basket_nux = 0
// -----------
// CLIMBING FIBER
// -----------
objref Exciteconn
objref Esynapse
objref Espikesource // A spike source for our inhibitory synapse
objref ecit_synapses,excit_synapses, ec_list
ecit_synapses = new List()
excit_synapses = new List()
ec_list = new List()
Couple {
ecit_synapses.append(Espikesource = new NetStim(0.5)) // arbitrary location
Espikesource.interval = 1000
/* inter-spike interval of the input (in ms) 1Hz = 1000ms inter-spike
interval
100Hz = 10ms interspike interval
*/
Espikesource.number = enux
Espikesource.start = 0
Espikesource.noise = 0 // =0 periodic input, = 1 Poisson
// for j=0,336 { // have taken this out. so now only have a single CF synapse on this compartment
Couple excit_synapses.append(Esynapse = new Exp2Syn(0.5)) /* the location of
synapse on
the compartment */
Esynapse.tau1 = 0.5 // synaptic time constant (ms)
Esynapse.tau2 = 1.2 // synaptic time constant (ms)
Esynapse.e = 0 // synaptic reversal potential (mV)
/* opening time constant of 0.5 ms, a closing time constant of 1.2 ms
and a reversal potential of 0 mV. */
thresh = 10 // not important when connection is from NetStim
delay = 0 // 54000
Eweight = 0.1 // 0.0062 connection strength in S 0.0000000062 = 6.2nS
Exciteconn = new NetCon(Espikesource, Esynapse, thresh, delay, Eweight)
ec_list.append(Exciteconn)
// setpointer mix_nip(0.5), Esynapse.i
// setpointer mix_cadifl(0.5), Esynapse.i
// }
}
// ------------------------------------
// Synapses
// j=0,19 adds 20 synapses to each dendritic compartment
// j=0,1000 adds 1001 synapses to each dendritic compartment
// PS you can use the synapse lists to double check things like:
// print icit_synapses.count
// print inhib_synapses.count
// If there is j=0,19 then there will be 20 synapses to each dendritic compartment. There will be 20*(85+1002) synapses.
// print 20*(85+1002)
// ------------------------------------
// -----------
// BASKET
// -----------
objref Econn
objref Isynapse
objref Ispikesource // A spike source for our inhibitory synapse
objref icit_synapses,inhib_synapses, nc_list
inhib_synapses = new List()
icit_synapses = new List()
nc_list = new List()
//---
//Soma
// 50 basket cells terminate on Purkinje cell on the soma
// Ispikesource.noise set to 0 because firing synchronously
//---
soma icit_synapses.append(Ispikesource = new NetStim(0.5)) // arbitrary location
Ispikesource.interval = 1000
/* inter-spike interval of the input (in ms) 1Hz = 1000ms inter-spike
interval */
Ispikesource.number = basket_nux
Ispikesource.start = 0
Ispikesource.noise = 0 // =0 periodic input, = 1 Poisson
for j=0,49 {
soma inhib_synapses.append(Isynapse = new Exp2Syn(0.5))
/* the location of synapse on the compartment */
Isynapse.tau1 = 0.9 // synaptic time constant (ms)
Isynapse.tau2 = 26.5 // synaptic time constant (ms)
Isynapse.e = -80 // synaptic reversal potential (mV)
/* opening time constant of 0.9 ms, a closing time constant of 26.5 ms
and a reversal potential of -80 mV. */
thresh = 10 // not important when connection is from NetStim
delay = 0.0
Iweight = 0 //3.72 connection strength in S
Econn = new NetCon(Ispikesource, Isynapse, thresh, delay, Iweight)
nc_list.append(Econn)
}
// -----------
// STELLATE
// -----------
//---
// 2 stellate cell synaptic contacts on every smooth dendritic compartment
// Ispikesource.noise set to 1 because firing asynchronously
// 1 on each SpinyDendrite (1002 synapses); 2 on every SmoothDendrite (2*85 = 190 synapses); total = 1,192 synapses
//---
// What you've done now - instead of having 1192 synaptic contacts onto this single comparment: you have just a single connection but you increase the
// frequency of this connect by 1192 times (i.e. decrease the interspike interval by 1192 times). This greatly speeds up the simulation.
Couple {
Couple icit_synapses.append(Ispikesource = new NetStim(0.5)) // arbitrary location
Ispikesource.interval = 1000/1192
/* inter-spike interval of the input (in ms) 1Hz = 1000ms inter-spike
interval
100Hz = 10ms interspike interval
*/
Ispikesource.number = inix
Ispikesource.start = 0
Ispikesource.noise = 1 // =0 periodic input, = 1 Poisson
// for j=0,1191 {
Couple inhib_synapses.append(Isynapse = new Exp2Syn(0.5))
/* the location of synapse on the compartment */
Isynapse.tau1 = 0.9 // synaptic time constant (ms)
Isynapse.tau2 = 26.5 // synaptic time constant (ms)
Isynapse.e = -80 // synaptic reversal potential (mV)
/* opening time constant of 0.9 ms, a closing time constant of 26.5 ms
and a reversal potential of -80 mV. */
thresh = 10 // not important when connection is from NetStim
delay = 0.0
Iweight = 0.001 // 0.09604 // 0.2 // 0.002604 // 0.02604 // 52.08 connection strength in S
Econn = new NetCon(Ispikesource, Isynapse, thresh, delay, Iweight)
nc_list.append(Econn)
// }
}
// -----------
// PARALLEL FIBER
// -----------
//---
//SpinyDendrites
// Parralel fiber synaptic inputs
//1 contact on every spiny dendritic compartment
// Espikesource.noise set to 1 because firing asynchronously
// j=0,199 is 200 synapses per spinydendrite
// 200,000 synapses at 0.01 Hz
// replace with just 1 synapse; frequency = 2000 Hz
// interspike inteval = 0.5
//---
Couple {
Couple ecit_synapses.append(Espikesource = new NetStim(0.5)) // arbitrary location
Espikesource.interval = 0.5
/* inter-spike interval of the input (in ms) 1Hz = 1000ms inter-spike
interval
100Hz = 10ms interspike interval
1000 Hz = 1ms interspike interval
2000 Hz = 0.5 ms interspike interval
10,000 Hz = 0.1 ms interspike interval
*/
Espikesource.number = paranux
Espikesource.start = 0
Espikesource.noise = 1 // =0 periodic input, = 1 Poisson
Couple excit_synapses.append(Esynapse = new Exp2Syn(0.5)) /* the location of
synapse on
the compartment */
Esynapse.tau1 = 0.5 // synaptic time constant (ms)
Esynapse.tau2 = 1.2 // synaptic time constant (ms)
Esynapse.e = 0 // synaptic reversal potential (mV)
/* opening time constant of 0.5 ms, a closing time constant of 1.2 ms
and a reversal potential of 0 mV. */
thresh = 10 // not important when connection is from NetStim
delay = 0.0
Eweight = 0.00007 // 0.007 // 0.0007 // connection strength in S 0.0000000007 = 0.7nS
Exciteconn = new NetCon(Espikesource, Esynapse, thresh, delay, Eweight)
ec_list.append(Exciteconn)
}
