[NEST Users] Re: [NEST 3.1] autapses/multapses switch for structural plasticity

Hi Ady,

in NEST 3 allowing autapses is a property of the connection, not of the kernel anymore. So you give it in the 'conn_spec' dictionary of the Connect() call:

Autapse

An /autapse/ is a synapse (connection) from a node onto itself. Autapses are permitted by default, but can be disabled by adding |'allow_autapses': False| to the connection dictionary.

– https://nest-simulator.readthedocs.io/en/v3.1/guides/spatially_structured_ne...

Same holds true for multapses.

Let us know if that works for you.

Best regards, Dennis

On 17.11.21 02:11, Aadhar Sharma wrote:

Hi all,

Is there a way to allow/disallow autapses and multapses for structurally plastic synapses in NESTv 3.1?

I used the following code for disabling autapses in NESTv2.20.1 with:

 nest.SetKernelStatus({
      'structural_plasticity_synapses': {
          'syn1': {
              'model': 'copied_synapse_model',
              'post_synaptic_element': 'Den_exc',
              'pre_synaptic_element': 'Axon_exc',
          }
      },
       'autapses': False,
 })

However, this does not work in NEST 3.1 (Error: "`autapses` is not a valid kernel parameter, valid parameters are: ...")

I am moving to NEST 3.1 and would like to disable autapses for structurally plastic neurons (i.e., no direct connections between synaptic elements of the same neuron).

Thanks for any help :)

Best regards, Ady

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