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ANATOMY 254 > lecture 7: circualtion brain > Flashcards

lecture 7: circualtion brain Flashcards

1
Q

what are the 2 main arteries we talk about

A

internal carotid

vertebral

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2
Q

where is the middle meningeal located and what does it supply

A

near the temple

supples the superficial dira matter

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3
Q

what does the common cartoid split into

A

internal cartoid

external carotid

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4
Q

what is the pathway for the interal cartoid

A

through tthe carotid canal, the petrous portion and tthe foreman lacerum

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5
Q

where does the vertebral artery pass before going to brain

A

through the transvere foramen of the first 6 cervical vertabra

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6
Q

the interal carotid is a division from the what

A

fivision from the common carotid artery

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7
Q

where does the internal carotid enter the skull

A

via the carotid canal

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8
Q

the internal carotid artery passes anteriorly and medially thorugh what

A

the cavernous sinus of the sphenoid body

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9
Q

what are the terminal brances of the int cartoid arttery

A

anterior cerebrlal

middle cerrebral

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10
Q

what are the two anterior ceberals connected by

A

anterior communicating artery

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11
Q

where do the vertrbral arteries perforate

A

throuh the dura and arachnpid to pass through the foramen magnum

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12
Q

the vertebral arteries end up in what space

A

subarachnod space

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13
Q

where to the 2 vertebral arterios unite and what do they form

A

unite anterior to pons to form basilar

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14
Q

what do the vertebral arteries unite to form

A

basilar

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15
Q

what is it called when the vertebral artery and basically artery meet

A

the vertebrobasilar arterior system

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16
Q

what is the vertebrobasilar arterior system also known as

A

posterior circulation of the brain

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17
Q

where does the basilar artery lay

A

lay close to the base of the skull

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18
Q

what does the basilar artery divide into

A

the 2 posterior ceberal arteries

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19
Q

where do the psoterior cerebral arteies join and how

A

at the internal carotid via the posterior commnicating arteries

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20
Q

know the circule of willis

A

l

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21
Q

what are the 3 cerebral arteries

A

anterior
posterior
middle

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22
Q

what does the atnerior cerebral artery supple

A

supplies most of the medial and superior surfaces of the brain and frontal pole

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23
Q

in what fissure do the anterior cerbral arteireis pass

A

pass on top of corpus callosum

in long fissue

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24
Q

what do the middle cerebral arteries supple

A

the lateral surface of the brain and temporal pole

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25
Q

what fissure do tthe middle cerebral pass through

A

towards lasteral fissure on top of insula

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26
Q

what do the posterior cerebrals supply

A

supply the intefeior surface of the brain aand occitial pole

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27
Q

what fissure does the posterior cerebral artery pass near

A

the transver fissuer

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28
Q

what creates an important anastomosis at the base of the brain

A

circle of willis

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29
Q

what does the circle of willis provife

A

an important anastomosis

offers different paths

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30
Q

what arteries form tthe circle of willis

A 
posterior cerebral
posterior communicating
anterior cerebral
anterior communicating
internal carotid
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31
Q

true or false; the middle cerebral artery forms part of the circle of willis

A

no it does not

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32
Q

what structuress lie near the circle of willis

A

the sella turcica (pituitary)
cavernus sinus
optic neve and chiasm

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33
Q

veins drianing the brain are tribuutairs of what

A

the large venous sinuese

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34
Q

where are venous sinuses located

A

in the dura matter

35
Q

what is different between venous sinuses and veins

A

venous sinuese are a foxied dinamater (they have no tunica media (no msucle))

36
Q

what is the main vein receiving blood from the venous sinuses

A

internal juglar vein

37
Q

what are some branches that offer collateral circulation if the jugular is occluded

A

angular vein, pteyrgoid plexus and suboccipital veins

38
Q

what are the dural venous sinuses

A

they are endothelium lined spcaes between the periosteal and meningeal layers of the dura

39
Q

the venous sinuses lie bwteen what

A

between the periosteal and meningeal layers of the dura

40
Q

large viens from the surface of the brain emtpty into what

A

dural venous sinuses

41
Q

where does the superior sag sinus lie

A

lies in the superior border of the falx cerebri

42
Q

where does the superior sagtial sinus orginiate and end

A

origitnate at the crista galli and ends near the internal occipital protuberance called confluence of sinus

43
Q

what is the confluence of sinues

A

sup sagital sinus
straigt sinus
occipital sinus
tranverse sinus

44
Q

the superior sagital ends at what junction

A

conflucence of sinuses

45
Q

T of F: the inferior sagital is larger than the superior sagital

A

false, it is much smaller

46
Q

where does the inferior sagital run

A

run in the inferior border of the falx ceberei and terminates in the straight sinus

47
Q

where does the inferior sagtinus terminate

A

the straight sinus

48
Q

what is the straight sinus fromed by the joining

A

the inferior sag and the great cerebral vein

49
Q

where does the straight sinus run

A

Runs infero-posteriorly along the line of attachment of the falx Cerebri and the Tentorium Cerebelli

50
Q

true or false: the straight sinus will join the confluence of sinuses

A

true

51
Q

what determines the junction between inf sagital sinus and straight sinus?

A

great ceberal vein

52
Q

the straight sinus is on top of the….

A

tentorium cerebelli

53
Q

how does the transverse sinus leave the confluece of sinuses

A

laterally along the occipital bones and the posteroinferior angles of the parietal bones

54
Q

what will the trainsverse sinus become as they approach the petrous portion of the temporal bones

A

sigmoid sinus

55
Q

which side of transvere sinus is larger and why

A

the right is larger because the superior sag usually drains to the right

56
Q

the sigmoid sinus follows what shaped course

A

s shaped course

57
Q

the sigmoid sinus follows an s shaped crouse in the …

A

posteiror cranial fossa

58
Q

the signmoid sinus forms deep grooves in what

A

in the temporal and occpital bones

59
Q

the sigmoid continues INF or SUP to the jugular formamen to become the blank

A

Continues inferiorly to the jugular foramen to become the internal jugular vein

60
Q

where does the occipital sinue lie

A

in the attached border of the falx cerbelli ending superiorly in the confluences of sinue

61
Q

true or false: the occipital sinus ends inferior in the confluecne of sinuses

A

false, superior

62
Q

what does the occipital sinus communicate with

A

with the internal vertebral venous plexus

63
Q

where is the cavernous sinus located (fossa)

A

in the middle cranial fossa

64
Q

the cavernous sinue is located on the middle cranial fossia situated bilarterially where

A

on each side of the sell turcisa

65
Q

what does each compartent next to the sella turcica contain

A

the carvenous sinuese

66
Q

where does the cavernous sinus extend from (starts and finish)

A

from the sup orbital fisse anteriorly to the apex of the petrous portion of the temporal bone posteriorly

67
Q

the cavernous sinue receives blood from what

A

sup ophthamic vein
inf opjthalamic vein
middle cerebral vein
sphenopartietal sinus

68
Q

where does the cavernous sinus drain

A

drain to the supior and inferior petrosal sinus (postero inferiorly) and to the pterygoid plexus

69
Q

what 3 things does the cavernous sinus contain?

A

internal carotid arteru
carotid plexis of sympathic nerves
abducens nerve

70
Q

what are ensheated in the lateral wall of the cavernous sinus

A

occulomotor (III)
trochealr (IV)
trigeminal (CV1 and cV2)

71
Q

where do the superior petrosal sinus run

A

run from the posterior ends of the veins of the cavernous sinus to the transverse sinus to then curve to form the sigmoid sinus

72
Q

where does the sup. petrosal sinus lie

A

in the anterolateral portion of the tentorium cerebelli

73
Q

where does the superior petrosal sinus attach

A

attaches to the petrous portion of the temporal bone (on top of petrous)

74
Q

where does the inferior petrosal sinue begin

A

beins at the posterior ends of the veins of the cavernous sinus inferiorly

75
Q

where does the innferior petrosnal sinus run

A

between the [etrous portion of the temporal bones and the basilar portion of the occipital bone

76
Q

what does the inferior petrosla sinus drain

A

drains the lateral cavernous sinus directly into the orgin of the IJV

77
Q

what dose the basilar plexus connect

A

connects inferior petrosal sinus to the internal vertebral venous network

78
Q

what do the emissary veins connect

A

connect dural venous sinuses with the veins outside the cranial

79
Q

the dural venous sinuses contains what

A

arachnoid granulation (collection of the arachnoid villi)

80
Q

what is the arachnoid granulation

A

collection of arachnoid villi

prolongation of arachnoid that protrude thorugh the meningeal later of the dura into the dural venous sinuses

81
Q

what will the arachnoid granulations affect

A

affect the transfer of CSF to the venous system

82
Q

where are arachnoid granulations usually found

A

usually found in areas of the sup sag and transverse sinue

83
Q

how are the arachnoid granualtations adapted

A

they are srtcutually adapted to transport CSF from the subsrachnoid space to the venous system

84
Q

know the midterm chart

A

.

ANATOMY 254 (17 decks)

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