Figure 2.

Whisking movement and active touch responses in superior colliculus. A, Whisking movement single-unit responses can be classified into four different types according to the timing of the response from whisking onset: peak1, peak2, peak1 + 2, and dispersed. Top, The color-coded plot depicts the response of each cell (n = 87) from the onset of the whisking movement stimulus. Bottom, Average responses for the four classes of cells shown above. B, The time course from whisking onset during which active-touch responses are significantly different (larger or smaller; Wilcoxon) compared with whisking movement responses is depicted in green for the three different classes of cells that are sensitive to active touch.