Figure 2. Time course of behavior.

(A) Images from overhead high-speed video illustrating the initial contact (left), palpation of the texture (middle) and the instant of withdrawal (right), equivalent to the beginning of the turn. (B) On each trial the rat approached the plate, triggering an optic sensory, and touched the texture with its whiskers (left). Once the animal identified the texture, it turned to the right or to the left drinking spout (middle) where it collected the water reward (right). (C) Time course of behavior in a typical recording session. Upper plot: for all the trials, horizontal red lines indicate the duration of touch time and blue lines indicate turn time. Trials are aligned on reward onset, 0 ms. Lower plot: By summating over trials, we calculated the probability that the rat was engaged in touch (red) or turn (blue) at any given time.