21 Nov
2023
21 Nov
'23
9:42 a.m.
Dear All, I am going to add weights for excitatory and inhibitory synaptic currents
according to this equation:
can you help me how I can add S(Wji) to a simple neuron model like one I attached to this
email?Thanks and BR, Atiyeh
21 Nov
21 Nov
6:16 p.m.
Hi Atiyeh,
Let me try to understand fully the model that you wish to implement. I am not sure what
the "S{...}" is, is it a generic function? Could you specify in case there is a
specific S() that you would like to use in your model?
Cheers!
Charl
On Tue, Nov 21, 2023, at 09:42, atiye nejadebrahim wrote:
Dear All,
I am going to add weights for excitatory and inhibitory synaptic currents according to
this equation:
Inline image
can you help me how I can add S(Wji) to a simple neuron model like one I attached to this
email?
Thanks and BR,
Atiyeh
_______________________________________________
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To unsubscribe send an email to users-leave(a)nest-simulator.org
*Attachments:*
• hh_psc_alpha4.nestml
27 Nov
27 Nov
4:06 p.m.
Dear Charl, thanks for your reply, in these equations
the function S{x} = x, if x ≥ 0, and 0 if x < 0.
in the neuron model, I have the only first term without s{w}, 1. my question is how can
I add s{w} in the neuron model? 2.for the second term, I defined spike generators and
parrot neurons and connect parrot neurons by static synapses to my desired neuron
populations. can I consider synaptic weight of parrent neurons' conncetions to neuron
poulations as s{w} for second term?3. How can I decrease the time of
simulation? Best, Atiyeh
On Tuesday, November 21, 2023 at 06:17:20 PM GMT+1, Charl Linssen
<nest-users(a)turingbirds.com> wrote:
#yiv5889717209 p.yiv5889717209MsoNormal, #yiv5889717209
p.yiv5889717209MsoNoSpacing{margin:0;}Hi Atiyeh,
Let me try to understand fully the model that you wish to implement. I am not sure what
the "S{...}" is, is it a generic function? Could you specify in case there is a
specific S() that you would like to use in your model?
Cheers!
Charl
On Tue, Nov 21, 2023, at 09:42, atiye nejadebrahim wrote:
Dear All,
I am going to add weights for excitatory and inhibitory synaptic currents according to
this equation:
can you help me how I can add S(Wji) to a simple neuron model like one I attached to this
email?
Thanks and BR,
Atiyeh
_______________________________________________
NEST Users mailing list -- users(a)nest-simulator.org
To unsubscribe send an email to users-leave(a)nest-simulator.org
Attachments:
- hh_psc_alpha4.nestml
_______________________________________________
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To unsubscribe send an email to users-leave(a)nest-simulator.org
4 Dec
4 Dec
12:38 p.m.
Dear Atiyeh,
Thanks for the clarifications. It looks like the S() function is only used to make sure
that positive weights stay positive, and negative weights stay negative, i.e. the weights
never change sign. Am I right to assume that you are not using any synaptic plasticity
rules in your network (i.e. you only use the static_synapse)?
You could ensure that this condition holds by construction of your network. For example,
if you make a connection to this neuron with a positive w_ji, then S(w_ji) is nonzero but
S(-w_ji) is zero, so there is an excitatory postsynaptic response but no inhibitory
postsynaptic response. If you make a connection to this neuron with a negative w_ji, then
the opposite holds, so you get only the inhibitory contribution and not the excitatory
one. So S() might be better implemented outside of the NESTML model; you can ensure the
same result during network construction, when you are making calls to nest.Connect().
For your second question, yes, that sounds correct. For your third question, do you mean
for the simulation to run faster? Are you already running multi-threaded? See e.g. setting
nest.local_num_threads to a value larger than one; detailed documentation for running NEST
using multiprocessing can be found at
https://nest-simulator.readthedocs.io/en/latest/hpc/parallel_computing.html.
I hope this helps, please let us know how you fare!
With kind regards,
Charl
On Mon, Nov 27, 2023, at 16:06, atiye nejadebrahim wrote:
Dear Charl,
thanks for your reply,
in these equations
Inline image
the function S{x} = x, if x ≥ 0, and 0 if x < 0.
in the neuron model, I have the only first term without s{w},
1. my question is how can I add s{w} in the neuron model?
2.for the second term, I defined spike generators and parrot neurons and connect parrot
neurons by static synapses to my desired neuron populations. can I consider synaptic
weight of parrent neurons' conncetions to neuron poulations as s{w} for second term?
3. How can I decrease the time of simulation?
Best,
Atiyeh
On Tuesday, November 21, 2023 at 06:17:20 PM GMT+1, Charl Linssen
<nest-users(a)turingbirds.com> wrote:
Hi Atiyeh,
Let me try to understand fully the model that you wish to implement. I am not sure what
the "S{...}" is, is it a generic function? Could you specify in case there is a
specific S() that you would like to use in your model?
Cheers!
Charl
On Tue, Nov 21, 2023, at 09:42, atiye nejadebrahim wrote:
Dear All,
I am going to add weights for excitatory and inhibitory synaptic currents according to
this equation:
Inline image
can you help me how I can add S(Wji) to a simple neuron model like one I attached to this
email?
Thanks and BR,
Atiyeh
_______________________________________________
NEST Users mailing list -- users(a)nest-simulator.org
To unsubscribe send an email to users-leave(a)nest-simulator.org
*Attachments:*
• hh_psc_alpha4.nestml
_______________________________________________
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To unsubscribe send an email to users-leave(a)nest-simulator.org
_______________________________________________
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To unsubscribe send an email to users-leave(a)nest-simulator.org
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161
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3 comments
2 participants
participants (2)
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atiye nejadebrahim -
Charl Linssen