Neurulation

As neurulation refers to the formation of the neural tube in chordates, and thus also in humans. The neural tube is the plant of the future central nervous system in the embryo.

The neurulation begins with the formation of the neural plate, a complex process of ( from the dorsal - that is facing the back - mesoderm ) over the Nieuwkoop center through the Spemann organizer is induced. This process can be seen as a thickening of the ectoderm in the human embryo on the 19th day of development.

The neurulation proceeds in three phases:

Through the cerebrospinal fluid ( cerebrospinal fluid), a pressurized fluid within the neural tube, the space for the brain develops. Even rudimentary eyes go later emerge from this Ektodermteil.

The neurulation induced by messengers of the underlying notochord, the impact on the interactions between the ectoderm companies (" community effect" ). The training of the neural tube was buoyed by changes in cell shape by rearrangement of the cytoskeleton.