The Formation of the neural tube

Dr. Platt this is my understanding of the formation the neural tube . The central canal and ventricles produce the neural plate [ which forms from the ectoderm ] .The neural fold forms as ridges along the embryo , actually making an fold, and causing the middle of the fold to become a groove [neural groove]. The neural crest then makes the sensory autonomic neruons in the PNS , melanocytes , facial bones and dentin of teeth . This happens because the neural crest breaks away from the folds , meeting at the midline to form the neural tube .The nueral tube then becomes the  brain and the spinal cord . Thank goodness , this concept was relatively simple , and the illustration on page 440 is very good .