Centralization of the Deuterostome Nervous System Predates Chordates


The origin of the chordate central nervous system (CNS) is unknown. One theory is that a CNS was present in the first bilaterian and that it gave rise to both the ventral cord of protostomes and the dorsal cord of deuterostomes. Another theory proposes that the chordate CNS arose by a dramatic process of dorsalization and internalization from a diffuse… (More)
DOI: 10.1016/j.cub.2009.05.063


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