Fig. 7. Effects of in vitro aldosterone (Aldo) on excitability of acutely cultured small-diameter neurons. Cells were isolated from normal dorsal root ganglia, and Aldo was added during the culture period (4–8 h before recording) at the indicated concentrations. (A ) Examples of multiple action potentials evoked by suprathreshold current pulses. (B ) Dose response of isolated neurons to Aldo. * Significantly different from control ANOVA.