Working at the Marine Biological Laboratory, Criswell used fluorescent cell tracking to determine that skates form their spines from somites alone. (sciencedaily.com)
Preliminary data we have now obtained further indicate that in somite cells, the activation of the NOTCH pathway triggers a «signalling module» that couples the initiation of myogenesis with the epithelial - mesenchymal transition (EMT) that allows them to migrate into the growing muscle. (inmg.fr)
We have recently shown that in avian embryos, muscle formation is initiated by Delta1 - positive neural crest cells migrating from the dorsal neural tube that, in passing, trigger NOTCH signalling and myogenesis in selected epithelial somite progenitor cells, allowing them to migrate into the nascent muscle to differentiate. (inmg.fr)