Bath application of ethanol (EtOH) reduces the PPR in CA1 pyramidal cells. A, Representative synaptically evoked IPSC traces, obtained with an interstimulus interval of 100 msec, recorded before, during the initial 3 min (time 0), and after 30 min of bath application of 100 mm ethanol and after washout. Averaged (from 7 sweeps/3 min; gray traces) currents are superimposed (black trace). B, Change in PPR versus time for the bath application of 100 mm ethanol. Data are the average ± SEM obtained from five different cells. *p < 0.05 versus control.