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neural crest
neural crest Neural crest refers to the two lengthwise ridges that appear along the primitive streak near the end of gastrulation as the nervous system begins to form.
Neural crest refers to the two lengthwise ridges that appear along the primitive streak near the end of gastrulation as the nervous system begins to form. They arise from folding of the neural plate, with a groove between them that later closes to become the neural tube.