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OB > Lecture 6 - Fetal Brain > Flashcards

Lecture 6 - Fetal Brain Flashcards

1
Q

CNS comes from what layer of gastrulation

A

ectoderm

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2
Q

describe neurulation

A

process by which the notochord (of mesoderm) stimulates ecoderm to create brain/spinal cord

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3
Q

order in which neural tube forms

A 
forms from ectoderm:
neural tube
neural groove
neural fold
neural tube
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4
Q

neural tube ends are called

A

anterior/posterior neuropore

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5
Q

lack of closure of neural tube can result in (2)

A

spina bifida

anencephaly

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6
Q

forebrain (pro) consists of (2)

A

diencephalon

cerebrum

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7
Q

midbrain (mes) consists of (1)

A

part of brainstem

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8
Q

hindbrain (rhomb) consists of (2)

A

brainstem (pons, M.O)

cerebellum

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9
Q

what weeks are a 2nd trimester scan?

A

18-22 week

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10
Q

In 1st trimester, what is the order of visualization of fetal brain structures? (3)

A

from posterior to midline:
rhomb (hindbrain)
cerebellum
diencephalon

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11
Q

what does the rhomb (hindbrain)

A

cystic structure

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12
Q

what are the 3 main views of the sono fetal brain in 2nd trimester?

A

transventricular
transthalamic
transcerebellar

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13
Q

CSF circulation pathway

A 
lateral ventricles
IVF munroe
3rd vent
Aqueduct midbrain/sylv
4th vent --> 3 openings 
2x foramen luscka and 1x magendle 
Subarachnoid space
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14
Q

Lateral ventricle regions

A

frontal/anterior horn
occipital/post horn
body/atrium
temporal horn

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15
Q

what is the atrium

A

base of the posterior/occip horn where it meets the temporal horn

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16
Q

what is between the thalami

A

interthalmic adnesion

17
Q

where is the 4th ventricle

A

between the pons/MO and cerebellum

18
Q

what do you measure in the transventricular ?

A 
anterior horn (between)
posterior horn (within at level of atrium)
19
Q

what should the posterior horn measure

A

<10 mm

20
Q

what should be visualized in the transthalamic view (4)

A

falx cerebri
cavum septum pellucidum
thalamus
shape of head

21
Q

brachycephaly

A

large BPD

22
Q

dolichocephali

A

large OFD

23
Q

at what level do you measure BPD, HC, OFD?

A

transthalamic

24
Q

what can be visualized in the transcerebellar view? (4)

A

all structures in transthal (falx cerebri, thalamus, CSP) PLUS
cerebellum
cisterna magna
nuchal fold

25
Q

what connects the L&R side of corpus callosum

A

vermis

26
Q

what do you see in midsag? (4)

A

CSP
3rd
4th
corpus callosum

27
Q

you can see the copus callosum in (2)

A

midsag

transcerebellar

28
Q

corpus callosum order of development structures (4)

A 
develops A-P
rostrum
genu
body
splenium
29
Q

calvarium is what? consits of? (3)

A

skull cap

all cranial bones except temporal

OB (20 decks)

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