chapter 12 terms Flashcards
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last portions of neural groove to enclose
neuropores
lateral portions of neural plate which migrate under ectodermal lining but detach from neural tube »_space; give rise to ganglia and adrenal medulla
neural crests
telencephalon and diencephalon derived from?
forebrain
no secondary vesicles are derived here?
midbrain
metencephalon and myelencephalon derived from?
hindbrain
telencephalon gives rise too?
cerebral hemispheres
diencephalon gives rise too?
thalamus, hypothalamus and epithalamus
metencephalon gives rise too?
pons and cerebellum
myelencephalon gives rise too?
medulla oblongata
small brain and cranium but normal sized face
results in gross mental retardation
microcephaly
failure of cleavage of the cerebrum
affected infants usually die within 6 months
several genes have been implicated with environmental influences
holoprosencephaly
most of infant’s brain exudes from skull»_space; may be left with only brainstem and improper vascularization also present
exencephaly
failure of the bones of the cranium close
cranium bifidum
small defect in which only the meninges containing CSF herniate
cranial meningeocele
large defect in which part of the brain and the meninges herniate
meningoencephalocele