Dear Thierry, I assume you are using NEST 2.20, not 2.2? Noisy spike generators usually send individual realisations of random spike trains to each target. Therefore, the only way to record the same spike trains that actually enter the neurons is to put parrot_neurons between the generator and the actual target and then connect the parrot to the target. A setup for multiple neurons would be like below. We need one parrot per actual neuron to get the individual spike trains. N = 20 gen = nest.Create('sinusoidal_poisson_generator', params={'amplitude':50.,'rate':15.0 }) parrots = nest.Create('parrot_neuron', N) neurons = nest.Create('ht_neuron', N) rec = nest.Create('spike_detector') receptors=nest.GetDefaults('ht_neuron')['receptor_types'] nest.Connect(gen, parrots) nest.Connect(parrots, neurons, 'one_to_one', {'model': 'static_synapse', ' receptor_type': receptors['AMPA'], 'weight':10.}) nest.Connect(parrots, rec) Best, Hans Ekkehard -- Prof. Dr. Hans Ekkehard Plesser Head, 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(a)nmbu.no Home http://arken.nmbu.no/~plesser On 03/01/2022, 11:09, "thierry nieus" <thierry.ralph.nieus(a)gmail.com> wrote: Dear all, first of all, happy new year! I am using nest 2.2 (installed by conda) and I have set up a simple network of 20-100 neurons based on the ht_neuron model. I am delivering some noise to all neurons with the sinusoidal_poisson_generator (I can switch to another) and the simulation produces the results I am looking for. However I would like now to have a look at the spikes entering the network and therefore I need to access all events generated by the random generator. A sample of my code is: import nest receptors=nest.GetDefaults('ht_neuron')['receptor_types'] nest.CopyModel("sinusoidal_poisson_generator",'sin_pois',{'amplitude':50.,'rate':15.0 }) nest.CopyModel("static_synapse","AMPAnoise",{"receptor_type":receptors["AMPA"],"weight":10. }) neurons=nest.Create("ht_neuron",1) noise=nest.Create('sin_pois',1) g = nest.Create('sin_pois', 1) # current pulse dc_gen = nest.Create("dc_generator") nest.SetStatus(dc_gen, {"amplitude": 20., "start": 400, "stop": 1050}) nest.Connect(dc_gen, neurons, 'one_to_one') # recorders detect_noise = nest.Create('spike_detector', 1) nest.Connect(noise, neurons, 'one_to_one', syn_spec="AMPAnoise") nest.Connect(noise, detect_noise, 'one_to_one') ''' the latest does not work Creation of connection is not possible because: All outgoing connections from a device must use the same synapse type. ''' Is there a way to record those spikes ? Thanks in advance for any help Best _______________________________________________ NEST Users mailing list -- users(a)nest-simulator.org To unsubscribe send an email to users-leave(a)nest-simulator.org