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Fig. 3. Artificial visual rotation during saccades does not affect saccade dynamics
(amplitude, duration or peak angular velocity). Flies performed spontaneous
saccades in a visual panorama displaying a 45° dark stripe in the
foreground (represented here in light gray for clarity) over a background of
thin vertical stripes with a spatial frequency of 22.5°. When a fly began
a saccade, either the foreground or background was rotated by a predetermined
amount. Top to bottom: no visual rotation (control, n=134 saccades);
foreground rotated with fly's turn (n=151); foreground rotated
against fly's turn (n=148); background with (n=163);
background against (n=142). Most of the distributions (here and in
other figures) are neither normal nor lognormal (Shapiro-Wilk test,
W<0.05); therefore, pink bars show the median value. None of the
distributions here differed significantly from the control (Kruskal-Wallis
nonparametric one-way ANOVA with Bonferroni correction for multiple
comparisons, P>0.05). N=14 flies.
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