... rearrangement cell shape ectoderm epiblast neural plate neural tube neurepithelium surface epithelium Formation of the neural tube, the process of neurulation, occurs in two phases in avian and mammalian embryos. During the first phase or primary neurulation, the flat, ectodermal neural plate...

... such behaviors. * Author for correspondence © 1990 by Company of Biologists 1990 ectoderm neural folds neural groove neural plate neural tube neurepithelium neurulation notochord Neurulation, the process of neural tube formation, is a crucial moment in the prenatal life history...