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neural tube defects

neural tube defects pl. n. a group of congenital abnormalities involving defects in the spine or skull caused by failure of the neural tube to form normally. They include spina bifida, in which the bony arches of the spine fail to close, and more severe defects of bone fusion involving herniation of neural tissue and consequent mental and physical disorders, such as meningocele, meningomyelocele, and meningoencephalocele.

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neural tube

neural tube A hollow tube of tissue in the early embryo of vertebrates that subsequently develops into the brain and spinal cord. It forms by folding of the ectodermal neural plate and has a central canal running through it. Sometimes the folds of the neural plate fail to close properly, resulting in neural tube defects (such as spina bifida) in the fetus.

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"neural tube." A Dictionary of Biology. . Encyclopedia.com. 19 Feb. 2018 <http://www.encyclopedia.com>.

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neural tube defect

neural tube defect Congenital malformations of the spinal cord caused by the failure of the closure of the neural tube in early embryonic development. Supplements of folic acid (400 μg/day) begun before conception reduce the risk.

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"neural tube defect." A Dictionary of Food and Nutrition. . Encyclopedia.com. 19 Feb. 2018 <http://www.encyclopedia.com>.

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neural tube

neural tube n. a hollow tube of tissue in the embryo from which the brain and spinal cord develop. It is formed when two edges of a groove in a plate of primitive neural tissue (neural plate) come together and fuse.

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"neural tube." A Dictionary of Nursing. . Encyclopedia.com. 19 Feb. 2018 <http://www.encyclopedia.com>.

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