Hello Evgenia, I assume you took the brunel_delta_nest model and just replaced the iaf_psc_delta neuron model with iaf_psc_exp_ps. For the delta-model, each synaptic input causes an instantaneous jump of the membrane potential by J_ex or J_in, respectively. These are given by J in turn and with the default J=0.1 and g=5, this means excitatory jumps of +0.1 mV and inhibitory jumps of -0.5 mV. In the iaf_psc_exp* models, on the other hand, the same input weight means that an incoming spike starts a postsynaptic current of 0.1 pA or -0.5 pA, respectively, which then decays exponentially. The resulting membrane potential change may be noticeably smaller. So I would suggest to increase J to see when you get spiking. Don't worry about increasing J by factors rather than small steps. To look at details, you could also attach a voltmeter to a few neurons so you can see the membrane potential evolution. Best regards, Hans Ekkehard -- Prof. Dr. Hans Ekkehard Plesser Department of Data Science Faculty of Science and Technology Norwegian University of Life Sciences PO Box 5003, 1432 Aas, Norway Phone +47 6723 1560 Email hans.ekkehard.plesser@nmbu.no<mailto:hans.ekkehard.plesser@nmbu.no> Home http://arken.nmbu.no/~plesser From: Evgenia Kartsaki &lt;evgenia.kartsaki(a)inria.fr&gt; Date: Friday, 25 August 2023 at 10:41 To: users(a)nest-simulator.org &lt;users(a)nest-simulator.org&gt; Subject: [NEST Users] Network simulation of Hanuschkin (2010) - precise spike times [Some people who received this message don't often get email from evgenia.kartsaki(a)inria.fr. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] Hello, I am trying to simulate the network of a model with precise spike times as in Hanuschkin (2010), which is based on the balanced random network of Brunel (2000). As far as I understand the model of Hanuschkin exists already in NEST here: https://nest-simulator.readthedocs.io/en/v3.5/models/iaf_psc_exp_ps.html . However, I haven't found an example of the network simulation. I have tried using the Brunel network (https://nest-simulator.readthedocs.io/en/stable/auto_examples/brunel_delta_…) with the iaf_psc_exp_ps model, but I got a firing rate (excitatory or inhibitory) of 0 Hz. I would appreciate any advice on that! Thanks in advance, Jenny _______________________________________________ NEST Users mailing list -- users(a)nest-simulator.org To unsubscribe send an email to users-leave(a)nest-simulator.org