Flashcards in Neuro Embryology High Yield Deck (35)
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1
When does neurulation begin?
3 weeks
2
How does the neural plate (neuroectoderm) form?
Notocord ncudes overlying ectoderm to form neuroectoderm
3
What is the alar plate (dorsal)?
Sensory
4
What is the basal plate (ventral)?
Motor
5
What is the adult derivative of the Telencephalon?
Cerebral hemisphere and lateral ventricles
6
What is the adult derivative of the diencephalon?
Thalamus and 3rd ventricle
7
What is the adult derivative of the mesencephalon?
Midbrain and Cerebral aqueduct
8
What is the adult derivative of the metencephalon?
Pons and Cerebellum, upper part of the 4th ventricle
9
What is the adult derivative of the myelencephalon?
Medulla and lower part of the 4th ventricle
10
Prosencephalon=?
Forebrain
Telecephalon and diencephalon
11
Rhombencephaol=?
Hindbrain
Metencephaol + Myelencephalon
12
Which cells are made from neural crest...CNS neurons or PNS neurons?
PNS neurons
The CNS neurons are from neuroectoderm
13
At what week gestation do neural tube defects develop?
4th week
14
Which amniotic fluid marker is INCREASED in neural tube defects?
aFP and AChE
15
"malformation of anterior neural tube leading to no forebrain development"
Anencephaly
16
"malformation of anterior neural tube leading to no forebrain development"
Anencephaly
17
"failure of bony spinal canal to close, but no structural herniation with INTACT dura"
Spina bifida occulta
18
"meninges herniate through bony defect"
Meningocele
19
"meninges and neural tissue herniate through bony defect"
Meningomyelocele
20
"most severe form of spina bifida, spinal cord can be seen externally"
Myeloschsis
21
"failure of the left and right hemispheres to separate"
holoprosencephaly... occurs at weeks 5-6
22
What condition is associated with holoprosenceophaly?
Patae (trisomy 13)
23
"Downward displacement of the cerebellar vermis and medulla through the foramen magnum with resulting hydrocephalus"
Arnold- Chiari malformation II
** associated with lumosacral memingomyelocele
24
"downward displacement of the cerebellar tonsils through the foramen magnum...generally asymptomatic"
Arnold- Chiari malformation I
25
"agenesis of cerebellar vermis with cystic enlargement of 4th ventricle"
Dandy- Walker
26
"agenesis of cerebellar vermis with cystic enlargement of 4th ventricle"
Dandy- Walker
27
"cystic cavity within the spinal cord with damage to anterior spinal commisural fibers"
Syringomyelia
bilateral loss of pain and temperature sensation in upper extremities (from damage to anterior commsural fibers)
28
What nerve provides sensation to the anterior 2/3 of tongue?
V3
29
What nerve provides taste to the anterior 2/3 of the tongue?
VII
30
