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Intro to the Spinal Cord
Terms in this set (23)
The nervous system of a vertebrate develops from what structure?
The neural tube is formed very early in the embryo process called??
What is the neural tube formation like??
It forms from a flat sheet which curves in on itself and then separates from the sheet to form a separate tube
What is essentially a thickening of the ectoderm, trough shaped, and vertically oriented??
True or False: The wide end lies rostrally (toward the head) and becomes the brain.
True or False: The slim end lies causally and becomes the spinal cord.
What is created on day 21 of gestation where the edges grow toward each other until they meet and fuse together creating a hollow cylinder??
Neural tube defects may include:
Anencephaly, encephalocele, cranioachischisis, iniencephaly, and spins bifida
What's is anencephaly?
A failure of fusion of the cranial end of the neural tube.
What results from the condition anencephaly?
Minimal development of the brain.
The brain stem may be mostly intact but the cerebellum may be ______________?
True or False: Considerable facial abnormalities are seen in children diagnosed with anencephaly.
What neural tube defect is not compatible with life and most fetuses die before or shortly after birth?
What rare disorder involves herniation of the intracranial contents, such as CSF and brain tissue, that protrudes through a defect in the cranium?
Encephalocele occurs most often in what region of the brain/skull??
True or False: Encephalocele may occur anywhere along the center of the skull from the nose to the back of the neck.
Survivors diagnosed with encephalocele may experience??
Hydrocephalus, spastic quadriplegia, microcephaly, ataxia, developmental delays, vision problems, growth retardation, and seizures
What is the most severe type of neural tube defect?
Craniorachischisis occurs when?
Either none of the neural tube closes leaving the brain and spinal cord open or it only partially closes
What neural tube defect is most commonly seen in OT??
What is spina bifida?
A failure in neural tube closure and closure of the overlying vertebral arches
What are the two types of spina bifida?
occulta and cystica
What form of spina bifida is less severe??
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