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  • Title: A single origin of the central nervous system?
    Author: Telford MJ.
    Journal: Cell; 2007 Apr 20; 129(2):237-9. PubMed ID: 17448982.
    Abstract:
    As Denes et al. (2007) reveal in this issue, the expression profile and roles of genes that pattern the nervous system in embryos of chordates and annelids are surprisingly similar. This extraordinary conservation suggests that the patterning mechanism has been inherited largely unchanged from the bilaterian common ancestor and that the central nervous system, although dorsal in fish and ventral in worms, is an ancient characteristic of animals.
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