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Fig. 9. Neural crest cells migrate through the sclerotome and can change axial levels once at the dorsal aorta. (A) Medial view of migrating neural crest cells shown at higher resolution in B-G. (B-C) Single cell, tracked through time, that migrates through the somite at one axial level. (D-E) This cell establishes filopodial contact with a cell in the SG anlagen immediately caudal to its axial level. (F) Cell moves caudally in the direction of the established contact. (G) This cell ends up populating the SG anlagen caudal to its original axial level of migration. Scale bar: 20 µm. D, dorsal; DRG, dorsal root ganglia; SG, sympathetic ganglia; so, somite; V, ventral