Based on the process of neurulation, where are Cranial and lumbar regions
the locations of most neural tube defects?
neural tube forms from _____ ectoderm
last portions of the neural tube to finish the cranial and caudal ends
neurulation are:
If the cranial neuropore remains open during Anencephaly
development, which anomaly will result?
What happens if the cranial neuropore remains -if the cranial neuropore remains open, the brain will be underdeveloped, exposed, continuous
open? with the skin
, 10/23/24, 4:59 PM
-incomplete development of the cranial neural tube, resulting in a brain that is an
undifferentiated and exposed mass
anencephaly (exencephaly, cranioschisis) -exposed with surface
-continuous w/ skin
-underdeveloped brain
-incomplete development of the caudal neural tube, resulting lumbar spinal cord that is
Myeloschisis
undifferentiated and exposed
-failure of the neural tube to fuse near the occipital region
inionschisis -rare
-cranial dos not fuse
that after the neural tube breaks from the surface sclerotome; vertebra
ectoderm, the ___ from somites migrates
around the neural tube and notochord to form
the ______
what could fail if you have delayed/late vertebral arches that may fail to form if something (late neurulation) disrupts this process
neurulation
If the caudal neuropore closes, but not in a -Spina bifica occulta
timely fashion, disrupting the vertebral arches, -Meningocele
which anomaly will result? -Meningomyelocele
-open vertebral arch
-normal defect
spina bifida occulta -spinous processes bifib and are open
-assumptomatic
-usually one open vertebral arch, no clinical sequelae
meningocele, -only meninges protrude through defect, rare
neural tube breaks from ectoderm, but herniates meningomyelocele,
through defect, causing damage to neural
components
neural tube continuous with skin myeloschisis
only meninges protrude through defect, rare meningocele
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