Fig. 5.

Target population average peristimulus time histogram during discrimination. A: population average firing rate in response to the task target was recorded during the No Task condition before each day's behavioral session and during that session. B: prestimulus firing rate was subtracted from each plot. C: evoked response 10 to 60 ms after tap onset was normalized to a sum of 1 and replotted to compare shape. D: cumulative sum of the normalized responses is plotted. A group of 168 paired recordings was used to make these plots.