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the neural plate folds inward, forming the neural groove. The edges of the groove fuse to form the neural tube, which in turn gives rise to the brain and spinal cord

the neural tube, which forms during gastrulation, gives rise to the neural plate, which gives rise to the neural groove from which the brain and spinal cord develop

neurulation involves three separate structures: the neural plate, the neural groove, and the neural tube. These structures develop simultaneously in separate parts of the embryo in order to form the brain and the spinal cord.

the neural plate folds outward, forming a ridge that then recedes and is covered by an expanding layer of ectoderm