Fig 2. Dependence of synaptic weight change Δw on the relative timing difference between a target postsynaptic spike and input presynaptic spike: t^ref and t^pre, respectively.

(A) Leaning window of the INST rule. (B) Learning window of the FILT rule. The peak Δw values for INST and FILT correspond to relative timings of just under 7 and 3 ms, respectively. Both panels show the weight change in the absence of an actual postsynaptic spike.