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==Developmental Origins==

==Developmental Origins==

The embryological origin of the CNS is from the '''neural ectoderm''' which is a ridge of tissue in the centre of the early embryo once the basic blastula has undergone a degree of differentiation. The neural ectoderm is formed via the thickening of the ectoderm and it's interaction with underlying basic neural tissues including the notochord. This interaction results in the formation of the neural plate, termed the neuroectoderm.  

The embryological origin of the CNS is from the '''neural ectoderm''' which is a ridge of tissue in the centre of the early embryo once the basic blastula has undergone a degree of differentiation. The neural ectoderm is formed via the thickening of the ectoderm and it's interaction with underlying basic neural tissues including the notochord. This interaction results in the formation of the neural plate, termed the neuroectoderm.  

[[File:Gray19 with color.png|thumb|centre|200px|Neurulation]]

[[File:Gray19 with color.png|thumb|centre|500px|Neurulation]]

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