Problems recording injected current

[Cristian Guerrero]

Hello,

I'm implementing a motoneuron model using NetPyne, and I need to apply a current profile to characterize the motor pool. However, I'm having trouble recording the traces—specifically, the current injected into the model from NetPyne.

Could someone please give me a hand? I’m not sure if I’m doing something wrong.
Below, I’m including part of my code showing how I apply the current and how I try to record the profile.

Thanks in advance!

Code to apply current

for cell in range(numCells):

        stimLabel = 'Inoise'+str(cell)

        netParams.stimSourceParams[stimLabel] = {

                                                'type': 'IClamp',

                                                'dur': sim_duration,

                                                'del': 0,

                                                'amp': f'abs(normal(0,{stdDevNoise}))'

                                                }

        netParams.stimTargetParams[stimLabel+'->MotorNucleus'] = {

                                                'source': stimLabel,

                                                'sec': 'dend',

                                                'loc': 0.5,

                                                'conds': {'pop': 'MotorNucleus',

                                                          'cellList': [cell]}}

Code to record the current

simConfig.recordTraces = {

           'v_soma': {'sec': 'soma', 'loc': 0.5, 'var': 'v'},

           'i_syn': {'sec': 'dend', 'loc': 0.5, 'var': 'i', 'synMech': 'exc'},

           'I_inj': {'sec': 'dend', 'loc': 0.5, 'var': 'i_save', 'stim': 'Inoise0'}

       }

[Valery Bragin]

Hello,

The issue is that you need to specify the label of stimTarget, not stimSource as `stim` in `recordTraces` . This is because each stimulus is ultimately identified by its target params. 

Also, make sure that i_save is a valid variable name in your IClamp model. 

Hope that helps!

Best regards,

Valery