Figure 2. Spike triggered average of inhibitory presynaptic cell.
The conditional mean firing rate of the inhibitory presynaptic cell given the postsynaptic cell has fired at time 
, is plotted as function of time, for different values for the strength of the presynaptic weight 
, 0.2, 0.3, 0.4, and 0.5 in red, orange, green, blue and purple circles, respectively. The dashed lines show the fits of the form 
with 
. The parameter 
was set to match the zero crossing point of 
, and we optimized the fit over the parameters 
and 
.