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Fig. 8. Correlation between downstroke deviation and rotational forces. (A) Time
course of rotational velocities and (B) time course of rotational forces for a
single individual, color-coded according to downstroke deviation. Data are
shown over a normalized time axis for the downstroke and upstroke. The filled
gray box indicates the ventral rotation, and the open gray box indicates the
dorsal rotation. For the ventral rotation, the pre-reversal portion occurs at
the end of the downstroke, and the post-reversal portion occurs at the
beginning of the upstroke. (CG) The following data are for the
experimental population. Black circles indicate values for the individual
shown in A and B. Correlation between downstroke deviation and (C)
pre-reversal peak rotational force (R2=0.07), (D)
pre-reversal total force peak (R2=0.20), (E) post-reversal
normalized time delay of rotational force peak (R2=0.15),
(F) post-reversal peak rotational force (R2=0.60) and (G)
post-reversal total force peak (R2=0.31).