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Anatomy final exam > Lecture 19 > Flashcards

Lecture 19 Flashcards

1
Q

what is the jobs of the cranial meninges

A
  1. protect the brain
  2. form supporting framework for vasculature and venous sinuses
  3. enclose the cerebrospinal fluid filled subarachnoid space
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2
Q

where do the cranial meninges lie

A

lie immediately deep to the cranium

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3
Q

order of the meninge layers

A

dura mater
arachnoid mater
pia mater

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4
Q

what is the space between the arachnoid mater and pia mater

A

subarachnoid space

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5
Q

what is the subarachnoid space filled with

A

cerebrospinal fluid

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6
Q

how does the cranial dural mater differ than the spinal dura mater

A

it consists of a outer periosteal layer and an inner meningeal layer

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7
Q

what are the four dural infoldings

A

falx cerebri
tentorium cerebelli
falx cerebelli
diaphragma sellae

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8
Q

what does the falx cerebri separate

A

lies in the longitudinal cerebral fissure to seperate the cerebral hemispheres

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9
Q

what does the tentorium cerebelli separate

A

the occipital lobes of cerebrum from the cerebellum; divides the cranial cavity into supratentorial and infratentorial compartments

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10
Q

what is the purpose of the falx cerebelli

A

partially separates the cerebellar hemispheres as it lies inferior to tentorium cerebelli

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11
Q

location of the diaphragma sellae

A

horizontal shelf of meningeal dura mater - suspended between the clinoid processes, forming the roof of the sella turcica that covers the pituitary gland

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12
Q

bony landmarks for the falx cerebri

A

anteriorly = frontal crest of frontal bone and crista gali of ethmoid bone
Posteriorly = internal aspect of occipital protuberance

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13
Q

bony landmarks for the tentorium cerebelli

A

clinoid processes of sphenoid bone, pertrous part of temporal bone, parietal and occipital bones

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14
Q

what are arachnoid granulations

A

visible as outward bulges of the dura mater. transfer CSF to the venous system

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15
Q

what are dural venous sinuses

A

endothelial-lined spaces, located within the dura, between the periosteal and meningeal dural layers

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16
Q

how many dural sinuses are there

A

7

17
Q

what dural sinus lies in the superior border of the falx cerebri

A

superior sagittal sinus

18
Q

boney landmarks of the superior sagittal sinus

A

begins at the crista galli, ends near the internal occipital protuberance at the confluence of sinuses

19
Q

what dural sinus lies in the inferior border of the falx cerebri

A

inferior sagittal sinus

20
Q

where does the inferior sagittal sinus end

A

into the straight sinus

21
Q

location of the straight sinus

A

runs along the line of attachment of the falx cerebri and the tentorium cerebelli

22
Q

what does the straight sinus join

A

the confluence of sinuses

23
Q

where does the occipital sinus lie

A

posterior border of falx cerebelli

24
Q

where does the occipital sinus end

A

superiorly at the confluence of sinuses

25
Q

where is the transverse sinus located

A

laterally from the confluence of sinuses in posterior margin of tentorium cerebelli; continuous with sigmoid sinus

26
Q

location of the sigmoid sinus

A

continuation of the transverse sinus. after it passes through the jugular foramina it is then the internal jugular vein

27
Q

where is the cavernous sinus located

A

bilaterally on sides of sella turcica on the body of the sphenoid bone

28
Q

four parts of the internal carotid artery (superior to inferior)

A

cerebral part
cavernous part
petrous part
cervical part

29
Q

where do the vertebral arteries arise from

A

in the neck from the subclavian arteries and ascend vertically in the neck passing through the transverse foramina of cervical vertebrae (C6-C1)

30
Q

what do the vertebral arteries meet as

A

the basilar artery

31
Q

what does the basilar artery provide

A

posterior cerebral
branches to brainstem
superior cerebellar
anterior inferior cerebellar

32
Q

what are the posterior communicating arteries

A

small arteries that provide a link between the posterior cerebral arteries and internal carotid arteries

33
Q

what does the internal carotid artery provide

A

middle cerebral
anterior cerebral

34
Q

what do the anterior communicating arteries connect

A

connects both anterior cerebral arteries

Anatomy final exam (7 decks)

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