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Fig. 3. Temporal frequency tuning curves for expansion and rotation optomotor
responses. Responses to different spatial wavelengths are pooled. Values are
means ± s.e.m. for N=36 flies. A Gaussian waveform (to
facilitate visual comparison only) is plotted in both panels and is shifted
downward
20% for the rotation plot. Maximum
WBA
(R/Rmax) refers to the peak left minus right
wingbeat amplitude response (R), divided by the maximum response in
the trial (Rmax).