Figure 8. Concentration dependence of volatile anesthetic effects on total charge transferred during a miniature inhibitory postsynaptic current. Data are normalized to control values and plotted versus (A) aqueous anesthetic concentration or versus (B) the MACAqfraction (see the legend to Figure 3). The numbers of cells for each data point in panels A and B are the same as in Figure 3. Squares = enflurane, circles = isoflurane, triangles = halothane. Dashed lines are the products of the Hill equations fit to the data in Figure 3and Figure 6.