Figure 2.

An example of a NoGo pattern formed by activity in two cells recorded from the same electrode. Details of pattern timing are shown at Upper Left. Upper Right shows the behavioral conditions corresponding to the NoGo behavior (see Fig. 1). (Lower) Each small tick mark shows the occurrence of an action potential, and each row shows a segment of data in which a pattern was detected. The rows have been slid past one another such that the first spikes of each occurrence of the pattern are aligned (a spike of cell # 4). The accurate timing between that spike and a subsequent spike in cell # 3 and a later spike of cell # 4 causes these later spikes to also line up in the display, forming the nearly vertical lines at 25 ± 4 and 406 ± 2 ms delay with respect to pattern onset. Note that this pattern repeated 19 times but occurred only during the NoGo trials. In this session, the rat performed 29 Go trials and 90 NoGo trials.