Neural folds

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Neural folds
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. Also after differentiation it turns into the neural tubes

[edit] Additional images

longitudinal section through the embryo.

Cross section through the embryonic disc showing the fold.

[edit] External links


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Prenatal development/Mammalian development of nervous system
General neural development/
neurulation/neurula
Eye development
Auditory development
Note: mostly ecoderm, but mesoderm is precursor for epineurium, perineurium, and endoneurium