Click on image to view larger version.

Fig. 4. Effect of L-NAME on subcomponents of embryonic rotation. Changes in
rotation rate were measured over 5 s intervals. (A) In the presence of APW,
two representative embryos displayed low basal rotation rates (0.3-1.2 r.p.m.)
that were interrupted by periodic surges of faster rotation. (B) In the
presence of 10 mmol l-1 L-NAME, two representative embryos
displayed lower basal rotation rates (0-0.05 r.p.m.) and fewer surges. Arrows
indicate the peak rotation rate during each surge in A and B.