Dear Thanh Binh To,
Thanks for your interest in trying the structural plasticity
functionality in NEST.
For the first point, the Poisson generator in NEST produces a unique
spike train for each of its targets. You can find more about the details
of the Poisson generator here:
https://nest-simulator.readthedocs.io/en/stable/models/poisson_generator.ht…
About points 2 and 3, at the beginning of the simulation there are no
connections in this network, the connections are generated as time goes
by and compatible synaptic elements become available in the different
populations. For more details on this implementation please look at:
https://www.frontiersin.org/journals/neuroanatomy/articles/10.3389/fnana.20…
I hope this was helpful. If you have any further questions please feel
free to reach out.
All the best,
Sandra
On 24.07.24 16:59, Thanh Binh To wrote:
Dear all,
in this example for structural plasticity with synaptic element, the
network has
- 2 spiking populations of StructuralPlasticityNode: one for
excitation (size Nexc) and the other for inhibition (size Ninh)
self.nodes_e = nest.Create('iaf_psc_alpha',
self.number_excitatory_neurons, {'synaptic_elements': synaptic_elements})
self.nodes_i = nest.Create('iaf_psc_alpha',
self.number_inhibitory_neurons, {'synaptic_elements':
synaptic_elements_i})
- and 1 Poisson generator for creating a noise spike, that is sent to
all neurons.
noise = nest.Create('poisson_generator')
nest.Connect(noise, self.nodes_e, 'all_to_all', {'weight':
self.psc_ext, 'delay': 1.0})
nest.Connect(noise, self.nodes_i, 'all_to_all', {'weight':
self.psc_ext, 'delay': 1.0})
Could someone explain me follows:
1. I understood that at time T, poisson Generator generates one spike.
If correct, all neurons receive this spike at the same time instance,
ans it makes no sense!
I do not know if poisson generator generates some spikes and sends
them to randomly chosen neurons?
2. How the connection pattern between nodes_e and nodes_i at the
beginning?
3. How the neuron connection pattern within nodes_e and within nodes_i
at the beginning?
Is there any reference paper or documentation about the concept of
structural plasticity with synaptic element, that is implemented in NEST?
Thank you very much for help.
With kind regards
Mit freundlichen Grüßen
Thanh Binh To
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--
Dr. Sandra Diaz Pier
Simulation & Data Lab Neuroscience
Jülich Supercomputing Centre
Institute for Advanced Simulation
Forschungszentrum Jülich
Office: +49 2461 61-8913
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