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Fig. 8. Actions of hind leg trochanteral muscles of Aphrodes during
jumping. Simultaneous recordings from trochanteral depressor (upper trace) and
levator (lower trace) muscles of the right hind leg during a jump. Selected
frames of the leg movements from high-speed images are shown above at the
times indicated in this and Figs
10,
11 (scale bar on right frame,
1 mm). The activity in the two muscles began when both hind legs were already
levated and resulted in an anterior movement of both (horizontal lines). The
activity in the depressor increased before the jump movement while that in the
levator declined.
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