Figure 2: 4 family K+ specific blockers do not modify PPF. Representative experiments are shown to exemplify that neither PPR (left upper panels) nor population-spike amplitude (left bottom panels) was modified by exposure to heteropodatoxin (a) or phrixotoxin (b). In this figure and Figures 36 horizontal bars indicate time of drug perfusion, the traces recorded before (1) and after (2) exposure to 4 toxins are shown on the right panels.