a synaptic connection between populations in an integrate and fire network
A synaptic connection between populations in an integrate and fire network. Each cell in the source population makes a connection with a fraction Fconn of the target population. When the presynaptic cell fires, each postsynaptic cell receives, with probability Pprop a conductance input with the profile of the difference of two exponentials governed by Trise and Tfall beginning after delay (all in ms). The peak conductance is Gmax and the reversal potential Erev.
The connect field controls the connectivity and may override the usual probabilistic connection algorithm. The "any" and "other" options only apply if the same cell appears in the pre- and post-synaptic population. In that case, if set to "other", cells are not allowed to contact themselves. If set to "any" they are.
If the connect field is set to "one-to-one" the ith cell in the first population is connected to the ith cell in the second population. If the populations are of different sizes, the excess in the larger populations have no connections. If the link connects a population to itself, then each cell is connected to itself. This is one way to implement a refractory period for example by opening a transient shunting conductance immediately after a cell fires.