Final answer:
The peripheral nerves are not derived from the neural tube developmentally.
Step-by-step explanation:
The structure that is not derived from the neural tube developmentally is the peripheral nerves. The neural tube is a structure that forms early in embryonic development and gives rise to the central nervous system, including the spinal cord and the brain. However, the peripheral nerves originate from the neural crest cells that migrate outward from the neural tube.
Learn more about Development of the nervous system