Figure 4

Posterior propagation of the regular movements, that is distinct from the peristaltic reflex, observed in the distal intestine of zebrafish larva at 8 dpf with a bolus. Kymographs of the bright field movie at four positions in the distal intestine (colored lines in the upper panel) along the anterior–posterior axis, from the data shown in Fig. 2 (20 min duration; Also see Supplementary video 1). Dotted lines demonstrate that the waves of periodic contractions propagate in the caudal direction. These regular movements may correspond to slow waves. See the text for the detail. Scale bar, 50 μm.