def run(self, cell, cmd, temp=22, dt=0.025):
"""
Run a single current-clamp recording on *section*.
Parameters:
cell : Cell
The Cell instance to test. IClamp will be attached to
cell.soma(0.5).
cmd : array
Array of current command values
temp :
temperature of simulation (22)
dt :
timestep of simulation (0.025)
"""
self.reset()
self.cell = cell
self.current_cmd = cmd
self.dt = dt
self.temp = temp
tend = len(cmd) * dt
# Configure IClamp
istim = h.iStim(0.5, sec=cell.soma)
istim.delay = 0
istim.dur = 1e9 # these actually do not matter...
istim.iMax = 0.0
i_stim = h.Vector(cmd)
i_stim.play(istim._ref_i, h.dt, 0)
# Connect recording vectors
self['vm'] = cell.soma(0.5)._ref_v
self['i_inj'] = istim._ref_i
self['time'] = h._ref_t
# GO
h.dt = dt
h.celsius = temp
h.tstop = tend
cell.initialize()
h.frecord_init()
while h.t < h.tstop:
h.fadvance()
def run(self):
"""
Perform a simulation run on the little network we built,
and plot the results
"""
sites = [x for x in self.cell.all_sections['axonnode']]
ptype = 'pulses'
self.default_durs=[10., 100., 25.]
stimdict = { # set up the stimulus parameters
'NP': 20,
'Sfreq': 500.0,
'delay': self.default_durs[0],
'dur': 0.5,
'amp': 2.0,
'PT': 0.0,
'dt': self.dt,
}
istim = h.iStim(0.5, sec=self.cell.soma)
istim.delay = 0.
istim.dur = 1e9 # these actually do not matter...
istim.iMax = 0.0
self.run_one(istim, stimdict, sites=sites) #do one simulation
def run(self,
pops,
cf=16e3,
temp=34.0,
dt=0.025,
stim='sound',
simulator='cochlea'):
"""
1. Connect pop1 => pop2
2. Instantiate a single cell in pop2
3. Automatically generate presynaptic cells and synapses from pop1
4. Stimulate presynaptic cells and record postsynaptically
"""
pre_pop, post_pop = pops
pre_pop.connect(post_pop)
self.pre_pop = pre_pop
self.post_pop = post_pop
# start with one cell, selected from the user-selected population, that has
# a cf close to the center CF
post_cell_ind = post_pop.select(1, cf=cf, create=True)[0]
post_cell = post_pop.get_cell(post_cell_ind)
post_pop.resolve_inputs(depth=1)
post_sec = post_cell.soma
self.post_cell_ind = post_cell_ind
self.post_cell = post_cell
pre_cell_inds = post_pop.cell_connections(post_cell_ind)[pre_pop]
pre_cells = [pre_pop.get_cell(i) for i in pre_cell_inds]
pre_secs = [cell.soma for cell in pre_cells]
self.pre_cells = pre_cells
self.pre_cell_inds = pre_cell_inds
self.stim = sound.TonePip(rate=100e3,
duration=0.1,
f0=cf,
dbspl=60,
ramp_duration=2.5e-3,
pip_duration=0.05,
pip_start=[0.02])
##
## voltage clamp the target cell
##
#clampV = 40.0
#vccontrol = h.VClamp(0.5, sec=post_cell.soma)
#vccontrol.dur[0] = 10.0
#vccontrol.amp[0] = clampV
#vccontrol.dur[1] = 100.0
#vccontrol.amp[1] = clampV
#vccontrol.dur[2] = 20.0
#vccontrol.amp[2] = clampV
#
# set up stimulation of the presynaptic cells
#
self.stim_params = []
self.istim = []
for i, pre_cell in enumerate(pre_cells):
if stim == 'sound':
pre_cell.set_sound_stim(self.stim, seed=i, simulator=simulator)
amp = 0.0
else:
amp = 3.0
istim = h.iStim(0.5, sec=pre_cell.soma)
stim = {}
stim['NP'] = 10
stim['Sfreq'] = 100.0 # stimulus frequency
stim['delay'] = 10.0
stim['dur'] = 0.5
stim['amp'] = amp
stim['PT'] = 0.0
stim['dt'] = dt
(secmd, maxt, tstims) = util.make_pulse(stim)
self.stim_params.append(stim)
# istim current pulse train
i_stim_vec = h.Vector(secmd)
i_stim_vec.play(istim._ref_i, dt, 0, pre_cell.soma(0.5))
self.istim.append((istim, i_stim_vec))
self['istim'] = istim._ref_i
# record presynaptic Vm
self['v_pre%d' % i] = pre_cell.soma(0.5)._ref_v
self['t'] = h._ref_t
self['v_post'] = post_cell.soma(0.5)._ref_v
#
# Run simulation
#
h.dt = dt
self.dt = dt
h.celsius = post_cell.status['temperature']
self.temp = h.celsius
post_cell.cell_initialize() # proper initialization.
h.dt = self.dt
custom_init(v_init=post_cell.vm0)
h.t = 0.
h.tstop = 200.0
while h.t < h.tstop:
h.fadvance()
def run(self,
mode='IV',
cf=16e3,
temp=34.0,
dt=0.025,
stimamp=0,
iinj=[1.0]):
self.dt = dt
self.temp = temp
self.make_cells(cf, temp, dt)
print dir(self.pre_cells[0])
seed = 0
j = 0
if mode == 'sound':
self.make_stimulus(stimulus='tone')
for np in range(len(self.pre_cells)):
self.pre_cells[np].set_sound_stim(self.stim, seed=seed)
seed += 1
synapses.append(pre_cells[-1].connect(post_cell,
post_opts={
'AMPAScale': 2.0,
'NMDAScale': 2.0
},
type=synapseType))
for i in range(synapses[-1].terminal.n_rzones):
xmtr['xmtr%04d' % j] = h.Vector()
xmtr['xmtr%04d' % j].record(
synapses[-1].terminal.relsite._ref_XMTR[i])
j = j + 1
synapses[
-1].terminal.relsite.Dep_Flag = False # no depression in these simulations
print 'setup to run'
self.stim_params = []
self.istim = []
self.istims = []
if mode == 'pulses':
for i, pre_cell in enumerate(self.pre_cells):
stim = {}
stim['NP'] = 10
stim['Sfreq'] = 100.0 # stimulus frequency
stim['delay'] = 10.0
stim['dur'] = 0.5
stim['amp'] = stimamp
stim['PT'] = 0.0
stim['dt'] = dt
(secmd, maxt, tstims) = make_pulse(stim)
self.stim_params.append(stim)
stim['amp'] = 0.
(secmd2, maxt2, tstims2) = make_pulse(stim)
# istim current pulse train
istim = h.iStim(0.5, sec=pre_cell.soma)
i_stim_vec = h.Vector(secmd)
self.istim.append((istim, i_stim_vec))
self['istim%02d' % i] = istim._ref_i
self.postpars = []
self.poststims = []
if mode == 'IV':
for i, post_cell in enumerate(self.post_cells):
pstim = {}
pstim['NP'] = 1
pstim['Sfreq'] = 100.0 # stimulus frequency
pstim['delay'] = 10.0
pstim['dur'] = 100
pstim['amp'] = iinj[0]
pstim['PT'] = 0.0
pstim['dt'] = dt
(secmd, maxt, tstims) = make_pulse(pstim)
self.postpars.append(pstim)
# istim current pulse train
pistim = h.iStim(0.5, sec=post_cell.soma)
pi_stim_vec = h.Vector(secmd)
self.poststims.append((pistim, pi_stim_vec))
self['poststim%02d' % i] = pistim._ref_i
#
# Run simulation
#
h.celsius = temp
self.temp = temp
# first find rmp for each cell
for m in range(self.npost):
self.post_cells[m].vm0 = None
self.post_cells[m].cell_initialize()
# set starting voltage...
self.post_cells[m].soma(0.5).v = self.post_cells[m].vm0
h.dt = 0.02
h.t = 0 # run a bit to find true stable rmp
h.tstop = 20.
h.batch_save()
h.batch_run(h.tstop, h.dt, 'v.dat')
# order matters: don't set these up until we need to
self['t'] = h._ref_t
# set up recordings
if mode == 'pulses':
for i in range(self.npre):
self.istim[i][1].play(self.istim[i][0]._ref_i, dt, 0)
self['v_pre%02d' % i] = self.pre_cells[i].soma(0.5)._ref_v
for m in range(self.npost):
if mode == 'IV':
self.poststims[m][1].play(self.poststims[m][0]._ref_i, dt, 0)
self['v_post%02d' % m] = self.post_cells[m].soma(0.5)._ref_v
h.finitialize() # init and instantiate recordings
print 'running'
h.t = 0.
h.tstop = 200.
h.batch_run(h.tstop, h.dt, 'v.dat')
def run_democlamp(cell, dend, vsteps=[-60,-70,-60], tsteps=[10,50,100]):
"""
Does some stuff.
"""
f1 = pylab.figure(1)
gs = GS.GridSpec(2, 2,
width_ratios=[1, 1],
height_ratios=[1, 1])
# note numbering for insets goes from 1 (upper right) to 4 (lower right)
# counterclockwise
pA = f1.add_subplot(gs[0])
pAi = INSETS.inset_axes(pA, width="66%", height="40%", loc=2)
pB = f1.add_subplot(gs[1])
pBi = INSETS.inset_axes(pB, width="66%", height="40%", loc=4)
pC = f1.add_subplot(gs[2])
pCi = INSETS.inset_axes(pC, width="66%", height="40%", loc=2)
pD = f1.add_subplot(gs[3])
pDi = INSETS.inset_axes(pD, width="66%", height="40%", loc=1)
#h.topology()
Ld = 0.5
Ld2 = 1.0
VClamp = h.SEClamp(0.5, cell)
VClamp.dur1 = tsteps[0]
VClamp.amp1 = vsteps[0]
VClamp.dur2 = tsteps[1]
VClamp.amp2 = vsteps[1]
VClamp.dur3 = tsteps[2]
VClamp.amp3 = vsteps[2]
Rs0 = 10.
VClamp.rs = Rs0
compensation = [0., 70., 95.]
cms = [cell.cm*(100.-c)/100. for c in compensation]
vrec = h.iStim(Ld, sec=dend[0])
vrec.delay = 0
vrec.dur = 1e9 # these actually do not matter...
vrec.iMax = 0.0
vrec2 = h.iStim(Ld2, sec=dend[0])
vrec2.delay = 0
vrec2.dur = 1e9 # these actually do not matter...
vrec2.iMax = 0.0
stim = {}
stim['NP'] = 1
stim['Sfreq'] = 20 # stimulus frequency
stim['delay'] = tsteps[0]
stim['dur'] = tsteps[1]
stim['amp'] = vsteps[1]
stim['PT'] = 0.0
stim['hold'] = vsteps[0]
# (secmd, maxt, tstims) = make_pulse(stim)
tend = 79.5
linetype = ['-', '-', '-']
linethick = [0.5, 0.75, 1.25]
linecolor = [[0.66, 0.66, 0.66], [0.4, 0.4, 0.3], 'k']
n = 0
vcmds = [-70, -20]
vplots = [(pA, pAi, pC, pCi), (pB, pBi, pD, pDi)]
for m, VX in enumerate(vcmds):
stim['amp'] = VX
pl = vplots[m]
print m, VX
(secmd, maxt, tstims) = make_pulse(stim)
for n, rsc in enumerate(compensation):
vec={}
for var in ['VCmd', 'i_inj', 'time', 'Vsoma', 'Vdend',
'Vdend2', 'VCmdR']:
vec[var] = h.Vector()
VClamp.rs = Rs0*(100.-rsc)/100.
cell.cm = cms[n]
# print VClamp.rs, cell.cm, VClamp.rs*cell.cm
vec['VCmd'] = h.Vector(secmd)
vec['Vsoma'].record(cell(0.5)._ref_v, sec=cell)
vec['Vdend'].record(dend[0](Ld)._ref_v, sec=dend[0])
vec['time'].record(h._ref_t)
vec['i_inj'].record(VClamp._ref_i, sec=cell)
vec['VCmdR'].record(VClamp._ref_vc, sec=cell)
VClamp.amp2 = VX
# vec['VCmd'].play(VClamp.amp2, h.dt, 0, sec=cell)
h.tstop = tend
h.init()
h.finitialize(-60)
h.run()
vc = np.asarray(vec['Vsoma'])
tc = np.asarray(vec['time'])
# now plot the data, raw and as insets
for k in [0, 1]:
pl[k].plot(vec['time'], vec['i_inj'], color=linecolor[n], linestyle = linetype[n], linewidth=linethick[n])
yl = pl[k].get_ylim()
if k == 0:
pass
#pl[k].set_ylim([1.5*yl[0], -1.5*yl[1]])
else:
pass
for k in [2,3]:
pl[k].plot(vec['time'], vec['Vsoma'], color=linecolor[n], linestyle = linetype[n], linewidth=linethick[n])
pl[k].plot(vec['time'], vec['VCmdR'], color=linecolor[n], linestyle = '--', linewidth=1, dashes=(1,1))
pl[k].plot(vec['time'], vec['Vdend'], color=linecolor[n], linestyle = linetype[n], linewidth=linethick[n], dashes=(3,3))
if VX < vsteps[0]:
pl[k].set_ylim([-72, -40])
else:
pl[k].set_ylim([-62,VX+30])
ptx = 10.8
pBi.set_xlim([9.8, ptx])
pAi.set_xlim([9.8, ptx])
PH.setX(pAi, pCi)
PH.setX(pBi, pDi)
pD.set_ylim([-65, 10])
# PH.setY(pC, pCi) # match Y limits
PH.cleanAxes([pA, pAi, pB, pBi, pC, pCi, pD, pDi])
PH.formatTicks([pA, pB, pC, pD], axis='x', fmt='%d')
PH.formatTicks([pC, pD], axis='y', fmt='%d')
PH.calbar(pAi, [ptx-1, 0, 0.2, 2.])
PH.calbar(pCi, [ptx-1, -50., 0.2, 10])
PH.calbar(pBi, [ptx-1, 0, 0.2, 10])
PH.calbar(pDi, [ptx-1, -50., 0.2, 20])
pylab.draw()
pylab.show()
def run(self, pre_sec, post_sec, n_synapses, temp=34.0, dt=0.025,
vclamp=40.0, iterations=1, tstop=240.0, stim_params=None, synapsetype='multisite', **kwds):
"""
Basic synapse test. Connects sections of two cells with *n_synapses*.
The cells are allowed to negotiate the details of the connecting
synapse. The presynaptic soma is then driven with a pulse train
followed by a recovery pulse of varying delay.
*stim_params* is an optional dictionary with keys 'NP', 'Sfreq', 'delay',
'dur', 'amp'.
Analyses:
* Distribution of PSG amplitude, kinetics, and latency
* Synaptic depression / facilitation and recovery timecourses
"""
Protocol.run(self, **kwds)
pre_cell = cells.cell_from_section(pre_sec)
post_cell = cells.cell_from_section(post_sec)
synapses = []
for i in range(n_synapses):
synapses.append(pre_cell.connect(post_cell, type=synapsetype))
self.synapses = synapses
self.pre_sec = synapses[0].terminal.section
self.post_sec = synapses[0].psd.section
self.pre_cell = pre_cell
self.post_cell = post_cell
self.plots={} # store plot information here
#
# voltage clamp the target cell
#
clampV = vclamp
vccontrol = h.VClamp(0.5, sec=post_cell.soma)
vccontrol.dur[0] = 10.0
vccontrol.amp[0] = clampV
vccontrol.dur[1] = 100.0
vccontrol.amp[1] = clampV
vccontrol.dur[2] = 20.0
vccontrol.amp[2] = clampV
#
# set up stimulation of the presynaptic axon/terminal
#
istim = h.iStim(0.5, sec=pre_cell.soma)
stim = {
'NP': 10,
'Sfreq': 100.0,
'delay': 10.0,
'dur': 0.5,
'amp': 10.0,
'PT': 0.0,
'dt': dt,
}
if stim_params is not None:
stim.update(stim_params)
(secmd, maxt, tstims) = util.make_pulse(stim)
self.stim = stim
if tstop is None:
tstop = len(secmd) * dt
istim.delay = 0
istim.dur = 1e9 # these actually do not matter...
istim.iMax = 0.0
# istim current pulse train
i_stim_vec = h.Vector(secmd)
i_stim_vec.play(istim._ref_i, dt, 0)
# create hoc vectors for each parameter we wish to monitor and display
synapse = synapses[0]
self.all_psd = []
if isinstance(synapses[0].psd, GlyPSD) or isinstance(synapses[0].psd, GluPSD):
for syn in synapses:
self.all_psd.extend(syn.psd.all_psd)
elif isinstance(synapses[0].psd, Exp2PSD):
for syn in synapses:
self.all_psd.append(syn)
#for i, cleft in enumerate(synapse.psd.clefts):
#self['cleft_xmtr%d' % i] = cleft._ref_CXmtr
#self['cleft_pre%d' % i] = cleft._ref_pre
#self['cleft_xv%d' % i] = cleft._ref_XV
#self['cleft_xc%d' % i] = cleft._ref_XC
#self['cleft_xu%d' % i] = cleft._ref_XU
#
# Run simulation
#
h.tstop = tstop # duration of a run
h.celsius = temp
h.dt = dt
self.temp = temp
self.dt = dt
self.isoma = []
self.currents = {'ampa': [], 'nmda': []}
self.all_releases = []
self.all_release_events = []
start_time = timeit.default_timer()
for nrep in xrange(iterations): # could do multiple runs....
self.reset()
self['v_pre'] = pre_cell.soma(0.5)._ref_v
self['t'] = h._ref_t
self['v_soma'] = pre_cell.soma(0.5)._ref_v
if not isinstance(synapse.psd, Exp2PSD):
self['relsite_xmtr'] = synapse.terminal.relsite._ref_XMTR[0]
if isinstance(synapse.psd, GluPSD):
# make a synapse monitor for each release zone
self.all_nmda = []
self.all_ampa = []
for syn in synapses:
# collect all PSDs across all synapses
self.all_ampa.extend(syn.psd.ampa_psd)
self.all_nmda.extend(syn.psd.nmda_psd)
# Record current through all PSDs individually
syn.psd.record('i', 'g', 'Open')
#for k,p in enumerate(self.all_nmda):
#self['iNMDA%03d' % k] = p._ref_i
#self['opNMDA%03d' % k] = p._ref_Open
#for k,p in enumerate(self.all_ampa):
#self['iAMPA%03d' % k] = p._ref_i
#self['opAMPA%03d' % k] = p._ref_Open
elif isinstance(synapse.psd, GlyPSD):
# Record current through all PSDs individually
for k,p in enumerate(self.all_psd):
self['iGLY%03d' % k] = p._ref_i
self['opGLY%03d' % k] = p._ref_Open
psd = self.all_psd
if synapse.psd.psdType == 'glyslow':
nstate = 7
self['C0'] = psd[0]._ref_C0
self['C1'] = psd[0]._ref_C1
self['C2'] = psd[0]._ref_C2
self['O1'] = psd[0]._ref_O1
self['O2'] = psd[0]._ref_O2
self['D1'] = psd[0]._ref_D1
#self['D3'] = psd[0]._ref_D3
#self['O1'] = psd[0]._ref_O1
elif synapse.psd.psdType == 'glyfast':
nstate = 7
self['C0'] = psd[0]._ref_C0
self['C1'] = psd[0]._ref_C1
self['C2'] = psd[0]._ref_C2
self['C3'] = psd[0]._ref_C3
self['O1'] = psd[0]._ref_O1
self['O2'] = psd[0]._ref_O2
elif isinstance(synapse.psd, Exp2PSD):
self['iPSD'] = self.all_psd[0].psd.syn._ref_i
if not isinstance(synapse.psd, Exp2PSD):
for i, s in enumerate(synapses):
s.terminal.relsite.rseed = util.random_seed.current_seed() + nrep
util.custom_init()
h.run()
# add up psd current across all runs
if isinstance(synapse.psd, GluPSD):
iampa = np.zeros_like(synapse.psd.get_vector('ampa', 'i'))
inmda = iampa.copy()
for syn in self.synapses:
for i in range(syn.psd.n_psd):
iampa += syn.psd.get_vector('ampa', 'i', i)
inmda += syn.psd.get_vector('nmda', 'i', i)
isoma = iampa + inmda
self.currents['ampa'].append(iampa)
self.currents['nmda'].append(inmda)
elif isinstance(synapse.psd, GlyPSD):
isoma = np.zeros_like(self['iGLY000'])
for k in range(len(self.all_psd)):
isoma += self['iGLY%03d'%k]
elif isinstance(synapse.psd, Exp2PSD):
isoma = self['iPSD']
self.isoma.append(isoma)
self.all_releases.append(self.release_timings())
self.all_release_events.append(self.release_events())
elapsed = timeit.default_timer() - start_time
print 'Elapsed time for %d Repetions: %f' % (iterations, elapsed)
def run(self, ivrange, cell, durs=None, sites=None, reppulse=None, temp=22,
dt=0.025, initdelay=0.):
"""
Run a current-clamp I/V curve on *cell*.
Parameters
----------
ivrange : dict of list of tuples
Each item in the list is (min, max, step) describing a range of
levels to test. Range values are inclusive, so the max value may
appear in the test values. Using multiple ranges allows finer
measurements in some ranges.
For example::
{'pulse': [(-1., 0., 1.), (-0.1, 0., 0.02)], 'prepulse': [(-0.5, 0, 0.1)]}
Optional keys include 'pulsedur' : the duration of the pulse, in ms
'prepulsecur: the duration of the prepulse, in ms
The prepulse or the pulse can have a single value if the other is ranged.
cell : Cell
The Cell instance to test.
durs : tuple
durations of (pre, pulse, post) regions of the command
sites : list
Sections to add recording electrodes
reppulse :
stimulate with pulse train
temp :
temperature of simulation (32)
dt :
timestep of simulation (0.025)
"""
self.reset()
self.cell = cell
self.initdelay = initdelay
self.dt = dt
self.temp = temp
# Calculate current pulse levels
icur = []
precur = [0.]
self.pre_current_cmd = []
npresteps = 0
if isinstance(ivrange['pulse'], tuple):
icmd = [ivrange['pulse']] # convert to a list with tuple(s) embedded
else:
icmd = ivrange['pulse'] # was already a list with multiple tuples
for c in icmd: # unpack current levels for the main pulse
try:
(imin, imax, istep) = c # unpack a tuple... or list
except:
raise TypeError("run_iv arguments must be a dict with tuples {'pulse': (imin, imax, istep), 'prepulse': ...}")
nstep = np.floor((imax-imin)/istep) + 1
icur.extend(imin + istep * np.arange(nstep)) # build the list
self.current_cmd = np.array(sorted(icur))
nsteps = self.current_cmd.shape[0]
# Configure IClamp
if durs is None:
durs = [10.0, 100.0, 50.0] # set default durs
if 'prepulse' in ivrange.keys():
if isinstance(ivrange['prepulse'], tuple):
icmd = [ivrange['prepulse']] # convert to a list with tuple(s) embedded
else:
icmd = ivrange['prepulse'] # was already a list with multiple tuples
precur=[]
for c in icmd:
try:
(imin, imax, istep) = c # unpack a tuple... or list
except:
raise TypeError("run_iv arguments must be a dict with tuples {'pulse': (imin, imax, istep), 'prepulse': ...}")
nstep = np.floor((imax-imin)/istep) + 1
precur.extend(imin + istep * np.arange(nstep)) # build the list
self.pre_current_cmd = np.array(sorted(precur))
npresteps = self.pre_current_cmd.shape[0]
durs.insert(1, 50.)
self.durs = durs
# set up stimulation with a pulse train
if reppulse is not None:
stim = {
'NP': 10,
'Sfreq': 50.0,
'delay': 10.0,
'dur': 2,
'amp': 1.0,
'PT': 0.0,
'dt': self.dt,
}
elif 'prepulse' in ivrange.keys():
stim = {
'NP': 2,
'delay': durs[0],
'predur': durs[1],
'dur': durs[2],
'amp': 1.0,
'preamp': 0.0,
'dt': self.dt,
}
self.p_start = durs[0]+durs[1]
self.p_end = self.p_start + durs[2]
self.p_dur = durs[2]
else:
stim = {
'NP': 1,
'delay': durs[0],
'dur': durs[1],
'amp': 1.0,
'dt': self.dt,
}
self.p_start = durs[0]
self.p_end = self.p_start + durs[1]
self.p_dur = durs[1]
# print stim
# print('p_: ', self.p_start, self.p_end, self.p_dur)
istim = h.iStim(0.5, sec=cell.soma)
istim.delay = 5.
istim.dur = 1e9 # these actually do not matter...
istim.iMax = 0.0
self.tend = np.sum(durs) # maxt + len(iextend)*stim['dt']
self.cell = cell
for i in range(nsteps):
# Generate current command for this level
stim['amp'] = self.current_cmd[i]
if npresteps > 0:
for j in range(npresteps):
stim['preamp'] = self.pre_current_cmd[j]
self.run_one(istim, stim, initflag=(i==0 and j==0))
else:
self.run_one(istim, stim, initflag=(i==0))
def run(self,
pre_sec,
post_sec,
temp=34.0,
dt=0.025,
vclamp=-65.0,
iterations=1,
tstop=200.0,
stim_params=None,
**kwds):
"""
"""
Protocol.run(self, **kwds)
pre_cell = cells.cell_from_section(pre_sec)
post_cell = cells.cell_from_section(post_sec)
synapse = pre_cell.connect(post_cell, type='simple')
self.synapse = synapse
self.pre_sec = synapse.terminal.section
self.post_sec = synapse.psd.section
self.pre_cell = pre_cell
self.post_cell = post_cell
#
# voltage clamp the target cell
#
vccontrol = h.VClamp(0.5, sec=post_cell.soma)
vccontrol.dur[0] = tstop
vccontrol.amp[0] = vclamp
#vccontrol.dur[1] = 100.0
#vccontrol.amp[1] = clampV
#vccontrol.dur[2] = 20.0
#vccontrol.amp[2] = clampV
#
# set up stimulation of the presynaptic axon/terminal
#
istim = h.iStim(0.5, sec=pre_cell.soma)
stim = {
'NP': 10,
'Sfreq': 100.0,
'delay': 10.0,
'dur': 0.5,
'amp': 10.0,
'PT': 0.0,
'dt': dt,
}
if stim_params is not None:
stim.update(stim_params)
(secmd, maxt, tstims) = util.make_pulse(stim)
self.stim = stim
if tstop is None:
tstop = len(secmd) * dt
istim.delay = 0
istim.dur = 1e9 # these actually do not matter...
istim.iMax = 0.0
# istim current pulse train
i_stim_vec = h.Vector(secmd)
i_stim_vec.play(istim._ref_i, dt, 0)
#
# Run simulation
#
h.tstop = tstop # duration of a run
h.celsius = temp
h.dt = dt
self.temp = temp
self.dt = dt
for nrep in xrange(iterations): # could do multiple runs....
self.reset()
self['v_pre'] = pre_cell.soma(0.5)._ref_v
self['t'] = h._ref_t
self['v_soma'] = post_cell.soma(0.5)._ref_v
self['i_soma'] = vccontrol._ref_i
util.custom_init()
h.run()
