Figure 3.

Two pyramidal cells that discharge when the rat jumps. The arrangement of the panels is identical to Figure 2, except that t = 0 is now set to the moment at which the rat jumps. In the raster plots of the top row, this means that the red bars now represent the moment at which the rat is dropped. Justification for referring to such cells as “jump related” is evident from the dense action potential (AP) bands near t = 0. From the histograms, it is seen that the peak firing rate of both cells is very high (>40 spikes/s) and that the duration of rapid firing is quite brief (<0.5 s). Note also that there is a gradual increase in the discharge of cell 1 for ∼1 s before the jump. In contrast, cell 2 appears to be especially quiet in the same interval. The plots of z-score against time in the bottom row once again emphasize the extremely tight confinement of discharge to near the time of the event.