Neural tube

The neural tube is the first stage of development of the central nervous system of chordates, especially vertebrates, including humans.

It arises from the fact that einwölbt the ectoderm of the embryo to the back side ( neural ) inward. The result is an elongate, cross-sectionally V -shaped recess, through which then closes again the ectoderm. The neural tube is dorsal ( back side) of the notochord.

From the neural tube occur in vertebrates, the spinal cord and the brain. In amphioxus, it remains as a nervous system. The larvae of salps also show a neural tube, which develops but back in the further course.

In humans, the training of the neural tube between the 19th and 28th day of development takes place. Disturbances of this training, eg by lack of folic acid can lead to neural tube defects ( anencephaly or spina bifida ).

From the lumen ( to the inside ) of the neural tube to form the ventricular system of the brain and the central canal of the spinal cord.