Fig. 2.

A: population responses to the target tap. Each peristimulus time histogram shows the population average neural response to a 200 micron tap delivered at time zero. Responses recorded from the No Task condition monkey are plotted with the dotted line, and responses during detection performance are plotted with the solid line. All data are paired, and one recording from a location during the No Task condition is paired with a recording from the same location during behavior. Data are averaged over all pairs that had a response to the target. B: normalized responses to the target tap. Same data are replotted, and the average prestimulus rate is subtracted. C: data are divided by the sum of all rates between 10 and 60 ms after tap onset to compare the shape of the responses. D: cumulative sum of the normalized responses are shown. A group of 124 paired recordings was used and averaged in all plots.