/* Driver Program for Midbrain Dopaminergic Neuron model */ /*Different from dist.hoc by Ih current hd, #of synapses, AMPA,NMDA formulation for all dend 0-37, inserting mechanisms in "forsec distDend" Prox or Distdend sections not in each dendrite, number of segments (inside each compartemnt) formulation nseg, read i.c. from different files, print less dend data, writ i.c. in diferent file */ /* The following command loads the standard run library functions into * the simulator. These library functions are used to initialize the * simulator, begin and end simulations, and plot variables during a * simulation. */ load_file("dopaminergic.hoc") timecon = 0 back= 0 /*1*/ /* 1 switch for running in the background */ sakmann=0 load_file("fixnseg.hoc") if(!back)load_file("nrngui.hoc") verbose= 0 /*0*/ v_init = -62.6 vcseries = 0 clamp = 0 /* switch for voltage clamp*/ restart = 0 /*1*/ /* switch for initializing from state.old */ tstart = 0 if(vcseries) tstop = 800 else tstop = 5000 /*time in msec*/ if(clamp && !vcseries) tstop= 600 if(timecon) tstop = 800 nsyn = 45 /* The number of synapses */ Dtmax = 1.0 Dt = 1.00 if(timecon) Dtmax = 1.0 dt = 5e-1 /*5e-4*/ if(timecon) dt = 0.01 nainit= 4.075 vsolder=v_init vsold=v_init /*PARAMETERS*/ na_cond = 550.0e-6 kdr_cond = 665.0e-6 ca_cond = 11.196e-6 kca_cond = 59.0e-6 a_cond_s = 570.0e-6 a_cond_p = 285.0e-6 a_cond_d = 266.0e-6 /*stronger gA *1.28 = 729.6, 364.8, 340.48*/ iapl = 0.1 /*in nA, -0.180nA=-180pA*/ global_ra = 40 forall Ra = global_ra global_cm = 1.0 forall cm = global_cm g_celsius = 35 celsius = g_celsius forall ion_style("na_ion", 2,2,0,0,0) access soma /* All default references are to soma */ objectvar syn[nsyn] /* Declare the object variables for * the three synapses */ objectvar stim objectvar stim,synn[nsyn],syna[nsyn] objectvar vc objref cvode cvode = new CVode(1) /* 0 for clamp*/ x= cvode.active(1) proc init_cell() { /* First set all of the dimensions and insert the channels into each * section. */ forsec "soma"{ {insert nabalan} {insert hh3 gnabar_hh3 = na_cond gkhhbar_hh3 = kdr_cond gkabar_hh3 = a_cond_s qs_hh3 = 56.0 qv_hh3 = 8.0} {insert pump} {insert leak} {insert cabalan} {insert cachan gcalbar_cachan = ca_cond gkbar_cachan = 0.0} {insert kca gkbar_kca = kca_cond} // {insert capump} } soma { stim = new MyIClamp(.5) {stim.del = 2500 stim.dur = 2500.0 stim.amp = 0.0 /*in nA, -0.180nA=-180pA*/ stim.amp2 = iapl} } forsec proxDend { {insert nabalan} {insert hh3 gnabar_hh3 = na_cond gkhhbar_hh3 = kdr_cond gkabar_hh3 = a_cond_p qv_hh3 = 60.0 qs_hh3 = 5.0} {insert pump} {insert leak} {insert cabalan} {insert cachan gcalbar_cachan = ca_cond gkbar_cachan = 0.0 } {insert kca gkbar_kca = kca_cond} } forsec distDend { {insert nabalan} {insert hh3 gnabar_hh3 = na_cond gkhhbar_hh3 = kdr_cond gkabar_hh3 = a_cond_d qv_hh3 = 60.0 qs_hh3 = 5.0} {insert pump} {insert leak} {insert cabalan} {insert cachan gcalbar_cachan = ca_cond gkbar_cachan = 0.0 } {insert kca gkbar_kca = kca_cond} } /* for i = 0,37 dend[i] { synn[i] = new NMDA(.5) synn[i].synstim = 2000.0 synn[i].Pbar = 0.10e-6 synn[i].isi = 20.0 synn[i].N = 50 synn[i].gmax = 0.005 syna[i] = new AMPA(0.5) syna[i].synstim = 2000.0 syna[i].gmax = 0.0 syna[i].isi = 20.0 syna[i].N = 50 } dend[26] { synn[38] = new NMDA(0.8) synn[38].synstim = 2000.0 synn[38].Pbar = 0.10e-6 synn[38].isi = 20.0 synn[38].N = 50 synn[38].gmax = 0.005 syna[38] = new AMPA(0.8) syna[38].synstim = 2000.0 syna[38].gmax = 0.0 syna[38].isi = 20.0 syna[38].N = 50 synn[39] = new NMDA(0.2) synn[39].synstim = 2000.0 synn[39].Pbar = 0.10e-6 synn[39].isi = 20.0 synn[39].N = 50 synn[39].gmax = 0.005 syna[39] =new AMPA(0.2) syna[39].synstim = 2000.0 syna[39].gmax = 0.0 syna[39].isi = 20.0 syna[39].N = 50 } dend[36] { synn[40] = new NMDA(0.8) synn[40].synstim = 2000.0 synn[40].Pbar = 0.10e-6 synn[40].isi = 20.0 synn[40].N = 50 synn[40].gmax = 0.005 syna[40] =new AMPA(0.8) syna[40].synstim = 2000.0 syna[40].gmax = 0.0 syna[40].isi = 20.0 syna[40].N = 50 synn[41] = new NMDA(0.2) synn[41].synstim = 2000.0 synn[41].Pbar = 0.10e-6 synn[41].isi = 20.0 synn[41].N = 50 synn[41].gmax = 0.005 syna[41] =new AMPA(0.2) syna[41].synstim = 2000.0 syna[41].gmax = 0.0 syna[41].isi = 20.0 syna[41].N = 50 } dend[35] { synn[42] = new NMDA(0.8) synn[42].synstim = 2000.0 synn[42].Pbar = 0.10e-6 synn[42].isi = 20.0 synn[42].N = 50 synn[42].gmax = 0.005 syna[42] =new AMPA(0.8) syna[42].synstim = 2000.0 syna[42].gmax = 0.0 syna[42].isi = 20.0 syna[42].N = 50 synn[43] = new NMDA(0.2) synn[43].synstim = 2000.0 synn[43].Pbar = 0.10e-6 synn[43].isi = 20.0 synn[43].N = 50 synn[43].gmax = 0.005 syna[43] =new AMPA(0.2) syna[43].synstim = 2000.0 syna[43].gmax = 0.0 syna[43].isi = 20.0 syna[43].N = 50 } dend[30] { synn[44] = new NMDA(0.8) synn[44].synstim = 2000.0 synn[44].Pbar = 0.10e-6 synn[44].isi = 20.0 synn[44].N = 50 synn[44].gmax = 0.005 syna[44] =new AMPA(0.8) syna[44].synstim = 2000.0 syna[44].gmax = 0.0 syna[44].isi = 20.0 syna[44].N = 50 } */ forall cm = global_cm forall Ra = global_ra g_celsius = 35 } tot=0 forall {tot=tot+nseg} print "segments before ", tot nseg=1 // Increase number of segments geom_nseg() tot=0 forall {tot=tot+nseg} print "segments after ", tot init_cell() /* Call the function to initialize our * cell. */ objref ss,f1,f2 ss = new SaveState() f1 = new File() f2 = new File() proc init() {local i access soma if(!restart){ finitialize(v_init) fcurrent() } if(restart){ f1.ropen("state.old") ss.fread(f1) f1.close finitialize(v_init) ss.restore() t=tstart if(cvode.active()){ cvode.re_init() } else { fcurrent() } frecord_init() } t = tstart } init() if(back){ if(!clamp ||verbose) {print t/1000,soma[1].v(0.5),soma[1].nai(0.5),soma[1].cai(0.5),dend[3].v(0.5),dend[3].cai(0.5),dend[17].v(0.5),dend[17].cai(0.5)} if(clamp && !vcseries && !verbose) print t/1000,vc.i,soma.cai(0.5),soma.v(0.5) if(vcseries) j= 10 else j = 0 for i = 0, j { if (vcseries) vc.amp1 = vc.amp1 + 10} if(vcseries) init() next = t + Dt flag1=0 flag2=0 hold = 0 while (tvsold && soma.v(0.5)>vsold)) { vsolder=soma.v(0.5) print t/1000,soma[1].v(0.5),soma[1].nai(0.5),soma[1].cai(0.5),dend[3].v(0.5),dend[3].cai(0.5),dend[17].v(0.5),dend[17].cai(0.5) next = t + Dt flag2=1 hold=dt soma.v(0.5)=vsolder } } if(t>=next){ Dt = 100*dt if(Dt>Dtmax) Dt = Dtmax if (Dt<.1) Dt = .1 next = t + Dt if(!clamp||verbose) {print t/1000,soma[1].v(0.5),soma[1].nai(0.5),soma[1].cai(0.5),dend[3].v(0.5),dend[3].cai(0.5),dend[17].v(0.5),dend[17].cai(0.5)} if(clamp && !vcseries && !verbose) print t/1000,vc.i,soma.cai(0.5),soma.v(0.5) } } print t/1000,soma[1].v(0.5),soma[1].nai(0.5),soma[1].cai(0.5),dend[3].v(0.5),dend[3].cai(0.5),dend[17].v(0.5),dend[17].cai(0.5) if(vcseries) print vc.amp1,vc.i f2.wopen("state.new") ss.save() ss.fwrite(f2) f2.close } else { forall Ra = global_ra forall cm = global_cm celsius = g_celsius } //load_file("damodel.ses") //