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Condition arising from compression of, or damage to, a nerve or nerve root. Sciatica is usually caused by degeneration of an intervertebral disc, which pro
congenital developmental disorder or disability characterized by an opening in the spinal cord, commonly found in the lower region of the cord. The disorder is a consequence of a failure of the posterior end of the neural tube to close during gestation ; disorder in which the embryo ’s neural tube does not close properly; a bulging of the spinal cord through a gap in the spinal column. It is a developmental disability resulting from the incorrect development of the spinal cord during early pregnancy. There are three (3) main types of Spina bifida: 1. Spina bifida occulta - where the only sign of the malformation is a hair or dimple at the site of the defect on the skin of the back. 2. Spina bifida cystica - where a sac or cyst is visible on the back covered by a thin layer of skin. 3. Cranium bifida - a failure of development of the bones of the skull.