Response kinetics of superior colliculus neurons. A-C: PSTHs of representative responses constructed with 1 msec bins. Collicular responses to air-puffs (A) or piezoelectric (B, piezo) vibrissa deflections. C-F: Boxplots depict median (solid line), mean (dotted line) and 1st and 3rd quartiles (box). Whiskers represent data within 1.5 times the range from the 1st to the 3rd quartile. Squares represent outliers (data outside 1.5 times the range from the 1st to the 3rd quartile). C: Neurons in the superior colliculus have low or no spontaneous activity. D: Response latencies evoked by air-puff deflections were not significantly different than those evoked by piezoelectric deflections (P = 0.2). E: Response magnitude was unaffected by stimulus type (P = 0.7). F: Response durations were short and unaffected by stimulus type (P = 0.07). All statistical comparisons use the Kolmogorov-Smirnov test.