from Neural Tube Defects and Patterning Defects
Published online by Cambridge University Press: 07 August 2021
One of the critical early steps in the development of the central nervous system (CNS) is the closure of the neural tube and subsequent coverage by mesenchymal and epithelial components. Failure of these steps results in dorsal axis anomalies of the CNS (1). Furthermore, coverage of the CNS by mesenchymal and epithelial components is necessary for the development of the skull and vertebral column, which are in turn necessary for the protection of the CNS. It is not always clear if the main abnormality is one of actual neural tube closure, or a failure of the CNS coverings to properly form and contain the CNS. Factors external to the fetus, such as adherent amniotic membranes, can cause injury or malformation to the developing CNS.
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