QUOTE
A study led by University of California, San Diego biologists suggests that, contrary to the prevailing view, the process in early development that partitions the nervous system in fruit flies and vertebrates, like humans, evolved from a common ancestor.
Based on the open access PLoS Biology paper "Threshold-Dependent BMP-Mediated Repression: A Model for a Conserved Mechanism That Patterns the Neuroectoderm":
http://dx.doi.org/10.1371/journal.pbio.0040313
John Latter / Jorolat
Evolution Research
http://evomech.blogspot.com/