Postjunctional and lateral I _Na activate earlier for narrow clefts and the mix/homogeneous-polarized distribution. The delay in timing between the I_Na peaks (on cell 25) and the cell 24 prejunctional membrane is shown as a function of f_Na for the baseline/polarized (black) and mix/homogeneous-polarized (magenta) distributions for different values of the cleft width w. Parameters: g_gap = 100 nS.