Roles of EPJPs in synchronizing 'whisking-like' TC responses in simulated networks. A) Membrane responses in a pair of FS cells induced by three TC inputs with variable latency to each cell. B1&2) Raster plot of a similar experiment as A1 showing the timing of spikes induced by asynchronous TC impulses in the two model FS cells without EPJP (B1) or with EPJP (0.3 nS, B2). Black and red arrows: FS cells 1 or 2 fire separately to the TC stimuli. B3) Cross-correlation analysis for evoked responses in the two model FS cells with different coupling strength (0-0.6 nS). C1) Effects of EPJP conductance on the spike initiation in model FS cells. C2) The relationship between EPJP strength and the cross-correlation coefficient was plotted. The curve is a best fit for the Boltzmann relation, CC/CCmax = 1 + exp [(g + g1/2)/K]}-1 where g1/2 = 0.22 ± 0.01 nS, R2 = 0.96, Chi2 = 0.007. CC: cross-correlation coefficient.