rectangular kernel

[neuro_py]

Hi, 

I want to model the current associated with the back-propagating action potential by the kernel K  with biphasic time dependence. 

How can I model this as a simple rectangular kernel of amplitude one, which is delayed by 0.5 ms and lasts 2 ms.

Many thanks!

[Marcel Stimberg]

Hi,

I'm missing a bit of context here... Is this a mult-icompartmental
neuron or is the idea to have some effective model of back-propagation
in a single-compartment neuron? In general, the easiest way to model a
rectangular current or conductance is with a synapse with two pathways.
E.g., let's say that the target cell (or compartment) has a
(dimensionless) variable K, then the Synapses object could be something
like this:

backprop = Synapses(source, target,
                    on_pre={'up': 'K_post += 1', 'down': 'K_post -=1'},
                    delay={'up': 0.5*ms, 'down': 2.5*ms})

Hope that helps, best

  Marcel