Figure 7. Cs⁺ blocks DAPs following single spikes.

The traces shown are brief excerpts of the recording obtained from the cell shown in Fig. 6. The left panels show examples of the initial action potentials associated with the onset of 4 spontaneous phasic bursts recorded under control conditions. The right panels show isolated spikes, and spike doublets, recorded from the same cell while phasic activity was abolished by the application of 5 mM Cs⁺. Note that the loss of phasic firing is associated with the absence of DAPs following single action potentials, and of their summation during consecutive spikes.