Figure 5. All navigational decisions appear to be based on a single linear combination of odor and light inputs.
(A–C) Reverse correlation in rotated coordinate system. μ,ν are linear combinations of the raw input stimuli according to the same scaling as used to combine filtered odor and light signals in Figure 3. (A) Turn-triggered averages. Average change in μ,ν prior to start of a turn. (B) Size-sorted turn-triggered averages. Displayed averages are lowpassed with a Gaussian filter (σ = 0.5 s) to clarify the long time-scale features. (C) Head-sweep-triggered average (for first head-sweep of turn). Shaded region indicates mean head-sweep duration (1.25 s).