Connectionists: Which simulators support structural dynamics?

[Daniel Miner]

The Brian simulator (http://briansimulator.org <http://briansimulator.org/>) supports this as well, but, last I checked, only with the Connection Matrix class (http://brian.readthedocs.org/en/1.4.3/reference-connections.html#brian.DynamicConnectionMatrix <http://brian.readthedocs.org/en/1.4.3/reference-connections.html#brian.DynamicConnectionMatrix>) found in Brian 1.x, which has been deprecated (though all the documentation is still available and it’s still supported on the mailing list) and replaced with the Synapse class in Brian 2 (which, in turn, does not support this). It’s possible updates have been made to the Synapse class that allow for this since I last looked into it, though I haven’t noted chatter on the user group about it.

Best,
Daniel Miner

> On Apr 6, 2016, at 12:01 AM, Fred Rothganger <frothga at sandia.gov> wrote:
> 
> The NEST simulator documents the capability to create/destroy synapses at runtime (http://www.nest-simulator.org/py_sample/structural-plasticity-example). Which other simulators support a similar capability?
> 
> For clarity, let's define "structural plasticity" as the ability to add and remove synapses and neurons while the simulation is actively running. Full support would include doing this on an HPC system (multiple compute nodes) and automatically rebalancing the load.
> 
> Several forms of partial support are possible, including:
> * Only the ability to add/remove synapses, but not neurons.
> * Limitation to a single compute node or thread.
> * Pre-allocating an oversized model, some elements of which are kept idle until needed.
> 
> -- Fred
> 
> Fred Rothganger
> Neural Computing Department
> Sandia National Laboratories

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