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Fig. 2. Spatiotemporal maps (STMap;
900 µm) showing the effect of NaCl (A;
3.6 min) and tetrodotoxin (TTX; B;
3.8 min) on anterograde
contraction waves at 7 d.p.f. (A) Anterograde gut activity was unaffected by
0.9% NaCl in comparison with the control period (ctrl). (B) TTX decreased the
frequency and distance of anterograde contraction waves in comparison with the
control period (ctrl).