When sector I and II were activated together, different behaviors appeared depending on the intensity of dendritic activation. Below Ca spike threshold, the conjoint BPR showed a burst enhancement but the pause was almost the same as in the two sectors alone (Figure 10). Conversely, when sector II Ca spike was supra-threshold, BPRs were dominated by the pause (Figure 10). The BPR burst became shorter and smaller and the pause longer and deeper than in any one of the two sectors activated alone. This was likely to reflect boosting of KCa current activation due to the conjoint action of the two sectors.