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Fig. 9. Histograms of responses of a rotation-sensitive EMD system for flight
sequences produced by flies flying in a stationary environment and during
optomotor stimulation. (A) Distribution of the mean value bins (grey) and
standard errors of left-minus-right eye EMD output of flies responding to
various arena velocities. (B) Histograms show the sum of EMD output
(left-plus-right eye) derived from the same flight data as shown in A.
Gaussian fits to each histogram are shown as solid red lines. All histograms
are normalized to the same area under the curve.