Figure 3.

Time course of odor concentration (yellow regions) and impulse frequency of an ON ORN (green) and an OFF ORN (blue) from the same sensillum. Ramp-like upward and downward concentration changes at slow rates of 5%/s (A), medium rates of 20%/s (B) and fast rates of 50%/s (C). Bin widths for impulse counts were 0.5 s for 5%/s ramps, 0.2 s for 20%/s ramps and 0.1 s for 50%/s ramps.