Fig. 7.
Low buffer increases firing excitability. A: effect of low buffer on resting Vm. B: effect of low buffer on input resistance (Rin) estimated by measuring the voltage drop caused by negative current pulses (Im) of different amplitudes. C: effect of low buffer on input resistance estimated by measuring the decay time constant (τ) after pulse offset. D: effect of low buffer on firing excitability estimated by measuring the number of spikes evoked by 500-ms positive current pulses of different amplitudes. *P < 0.05. E: same data shown in D but plotted as perievent time histograms with 100-ms bins.