Now, we also have neuralation take place. And neuralation is basically when we form the noticord. The notrecord eventually goes on to form the neural folds as well as the neural plate. The neural plate then forms the neural tube as well as these tiny neural crests. And the neural crests give rise to the peripheral nervous system while the neural tube gives rise to the central nervous system the brain as well as the spinal cord. So we see that the nervous system begins to form during the first trimester.