Neural Models: FLIF, RF, and IF
- Unfortunately PyNN, and more importantly SpiNNaker, does not have
our FLIF model.
- Both, and HICANN, provide us the ability to put in our new model,
but we've not tried that.
- Our FLIF model was a 10ms one, and SpiNNaker wants a 1ms model.
- So, we used the standard Izhikevich model with 1ms time steps.
- There are other standard models, including Hodgkin Huxley models,
but we thought Izhekivch would be relatively easy.
- Unfortunately, we didn't read the fine print and thought that
the Izhikevich model was Integrate and Fire, when it's really
reverberate and fire.
- That means if you inhibit a neuron enough, it fires.
- One thing that we found odd was that the synaptic models are really
complex.
- In our FLIF model, a neuron fires, and the next (10 ms) step the
next neuron gets the activity.
- The only thing that is complex is the learning.
- The PyNN models all use complex dynamics of transfer so
the post-synaptic neuron gets activity over many (1 ms.) time
steps.