English: Additional file 1: Movie 1 Explant of colon from an E12.5 Ednrb-hKikGR mouse in which a group of ENCCs that were 600 to 700 μm from the wavefront were photoconverted from green to red. Some of the photoconverted ENCCs migrated along longitudinally-oriented strands with high speed (cells tracks indicated by blue and purple lines). Z-series images using a X10 objective lens through the ENCC network were captured every four minutes for 10 hours, and then each z-series projected. Caudal is to the right.