Dear Maryada, Thanks for writing in. Which neuron model are you using? From a simple test scrip with the "iaf_psc_exp" model, I am getting a nonzero calcium concentration: *import* *nest* n = nest.Create("iaf_psc_exp") nest.Simulate(100) n.get("Ca") Yields 0.014928834091366892. The "beta_Ca" parameter can be used to tweak the increment upon each postsynaptic spike, and "tau_Ca" is the decay constant. I am of course happy to work with you to set up a custom NESTML model if you need additional or different features to keep track of calcium concentration. With kind regards, Charl On Thu, Feb 16, 2023, at 20:21, Maryada Maryada wrote: Dear NEST Users, I would like to "record" or read calcium concentration of the neurons (let's say aeif_cond_exp). For now Ca variable is 0 before and after I simulate, however the neuron spikes. Is there any neuron model that supports this, or do I need to edit the nestml of the desired model to achieve this. If so, a sample code snippet would be helpful. -- Thanks and Regards *Maryada* _______________________________________________ NEST Users mailing list -- users(a)nest-simulator.org To unsubscribe send an email to users-leave(a)nest-simulator.org _______________________________________________ NEST Users mailing list -- users(a)nest-simulator.org To unsubscribe send an email to users-leave(a)nest-simulator.org