Neural folds

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Neural folds
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Chick embryo of thirty-three hours’ incubation, viewed from the dorsal aspect. X 30. (Neural fold labeled at center left, third from the bottom.)
Gray's subject #7 50
Carnegie stage 9
Precursor neural plate
Gives rise to neural tube
Dorlands/Elsevier f_11/12371345

In front of the primitive streak two longitudinal ridges, caused by a folding up of the ectoderm, make their appearance, one on either side of the middle line. These are named the neural folds; they commence some little distance behind the anterior end of the embryonic disk, where they are continuous with each other, and from there gradually extend backward, one on either side of the anterior end of the primitive streak.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.


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