Fluctuations linearize the relationship between sensory drive and locomotor response.

(A) Odor-evoked locomotor patterns as a function of odor stimulus amplitude for models without (top), or with ongoing fluctuations (bottom). (B) Maximum locomotor frequencies observed for models without (red), or with (blue) ongoing fluctuations at different odor stimulus amplitudes. Shown are the mean and standard deviations for 5 repetitions of each experiment.