Learning curves for STDP.

<p>Under the simple STDP model (red curve), potentiation occurs only if the postsynaptic spike falls within a time window of length (typically ms) after the presynaptic spike. The convergence properties of this simpler version in conjunction with rectangular non-additive EPSPs are easier to analyze. In our simulations we use the more complex version (blue dashed curve) in combination with EPSPs that are modeled as biologically realistic -kernels (with plausible time-constants for rise and decay of respectively ms).