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Neuro I > Meninges and Dural venous sinuses > Flashcards

Meninges and Dural venous sinuses Flashcards

1
Q

what is pia mater made out of

A

areolar CT

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2
Q

where is the subarachnoid space and is it a real space

A

between arachnoid and pia

real space with CSF

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3
Q

where in the cranial vault does arachnoid mater dip into sulci

A

longitudinal fissure

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4
Q

what are the cisternae in the brain

A

areas of accumulated CSF

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5
Q

how does CSF get into subarachnoid space

A

arachnoid granulations

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6
Q

what are the layers of dura in the cranial vault

A

periosteal and meningeal

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7
Q

what type of mater travels out with CN

A

all 3, turn into neural sheaths

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8
Q

What is the falx cerebri

A

sickle shaped dura between cerebri

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9
Q

what does the falx cerebri attach to anteriorly and posteriorly

A

anteriorly to crista galli of ethmoid bone

posteriorly to internal occipital protuberance to become continuous with tentorium cerebelli

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10
Q

what sinuses lay within the falx cerebri

A

superior sagittal sinus

inferior sagittal sinus

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11
Q

what sinuses are contained within the tentorium cerebelli

A

transverse sinus and superior petrosal sinus

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12
Q

what does the tentorial notch wrap around

A

midbrain

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13
Q

what sinus is withing the fusion of falx cerebri and tentorium cerebelli

A

the straight sinus

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14
Q

where is the falx cerebelli

A

between cerebellar hemispheres

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15
Q

what sinus is within falx cerebelli

A

occipital sinus

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16
Q

what is the diaphragma sellae

A

dura over roof of hypophyseal fossa

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17
Q

what type of cells line the dural venous sinuses

A

endothelium

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18
Q

are there valves in the dural venous sinuses

A

NO

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19
Q

where do all the sinuses ultimately lead to

A

internal jugular v

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20
Q

where does the superior saggital sinus dump into

A

confluens of sinuses

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21
Q

what vv does the superior sagittal sinus receive

A

emissary, cerebral, meningeal, diploic and CSF

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22
Q

where do arachnoid granulations protrude into sinus

A

venous lacunae

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23
Q

What vv dump into inferior sagittal sinus

A

cerebral and meningeal

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24
Q

where does the inferior sagittal sinus dump into

A

straight sinus

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25
Q

what vv drain into straight sinus

A

infeiror sagittal and great cerebral vein (Galen)

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26
Q

where does the straight sinus dump into

A

confluens of sinuses

27
Q

the superior sagittal sinus usually forms what sinus

A

R transverse

28
Q

the straight sinus usually forms what sinus

A

L transverse

29
Q

what sinus are the transverse sinuses continuous with

A

sigmoid

30
Q

what does the sigmoid sinus turn into

A

jugular bulb at jugular foramen

31
Q

what vv or sinuses dump into sigmoid

A

superior petrosal with transverse

inferior petrosal at jugular bulb formation

32
Q

where is the occipital sinu

A

surrounds foramen magnum and communicates with basilar sinus

33
Q

he confluens of sinuses is a juncture for what

A

superior sagittal, straigh, transverse and occipital

34
Q

where is the phenoparietal sinus

A

located bilaterally between opposed layers of dura along posterior edge of lesser wing of spehnoid bone and drains to cavernous sinus

35
Q

what CN are in the cavernous sinus outer wall

A

CN III, IV V1 V2

36
Q

what structures run in the cavernous sinue internally

A

internal carotid and CN VI

37
Q

what vv does the cavernous sinus receive

A

ophthalmic v, sphenoparietal sinue, cerebral vv, emissary v

38
Q

where is the intercavernous sinus

A

in diaphragma sellae

39
Q

how does the cavernous sinus drain

A

superior and inferior petrosal sinuses

40
Q

where does superior petrosal sinus come off

A

posterior to junction of transverse and sigmoid sinuses

41
Q

where does inferior petrosal sinus come off

A

posterior to junction of sigmoid sinus and jugular bulb

42
Q

where is the basilar plexus

A

basilar portion of occipital bone, connects opp inferior petrosal sinuses

43
Q

what are the borders of the anteiror cranial fossa

A

ant: frontal bone
post: lesser wings of sphenoid, chiasmatic groove
floor: orbital plates of frontal bone, ethmoid, lesser wings of sphenoid

44
Q

what are the landmarks in the anterior cranial fossa and bones they are on

A 
crista galli (ethmoid)
cribiform plate (ethmoid)
orbital frontal plates (frontal)
45
Q

what runs through cribiform plate

A

olfactory fibers from CN I

46
Q

what foramina are in the anterior cranial fossa and what run thru them

A

cecum- nasal emissary v
anterior ethmoidal- anterior ethmoidal AVN
posterior ethmoidal- posterior ethmoidal AVN

47
Q

what are the borders of the middle cranial fossa

A

ant: lesser wings of sphenoid, chiasmatic groove
post: petrous ridge
floor: sphenoid, temporal bone(squamous and petrous portions)

48
Q

what bone contains all landmarks of the middle cranial fossa

A

sphenoid

49
Q

what is the anterior clinoid process an attachment for and what cranial fossa part is it in

A

tentorium cerebelli

in middle cranial fossa

50
Q

what part of cranial fossa is the chiasmatic groove in

A

middle

51
Q

where is the optic foramina and what runs in it

A

middle cranial fossa, sphenoid bonne

optic CN II and ophthalmic aa

52
Q

what part of cranial fossa is sella turcica and hypophyseal fossa in

A

middle

53
Q

what are the posteiror clinoid processes attachments for? what are they lateral projections of?

A

attach for tentorium cerebelli

lateral projections of dorsum sellae

54
Q

where is the carotid groove

A

lateral to sella turcica

55
Q

what is the clivus

A

downward sloping portion of sphenoid which articulates with basilar portion of occipital bone in posterior cranial fossa

56
Q

what foramina are in middle cranial fossa and what runs thru them

A

optic canal- CN II and ophthalmic aa
superior orbital fissure- CN III, IV, V1, VI and superior ophthalmic v
rotundum- CN V2
ovale- CN V3, accessory meningeal a and lesser petrosal n
spinosum- middle meningeal a, recurrent meningeal n (V3)
lacerum- meningeal branch of ascending pharyngeal a
hiatus for greater petrosal n VII
hiatus for lesser petrosal n IX

57
Q

what are the boundaries of the posterior cranial fossa

A

ant: petrous ridge, dorsum sellae
post: occipital bone
floor: occipital bone and some temporal

58
Q

what foramina are in posterior cranial fossa and what runs in them

A

internal acoustic- VII, VIII, internal labyrinthine a
aquaduct vestibuli- opening of endolymphatic duct
mastoid- mastoid emissary v
condyloid canal- condyloid emissary v
formaen magnum- spinal cort, spinal roots of XI, vertebral aa, and/post spinal aa, dural vv with venous plexus
hypoglossal canal- CN XII

59
Q

where does anterior meningeal a come from and what does it supply

A

off internal carotid-> ophthalmic a-> anterior ethmoidal a-> anterior meningeal a
supplies floor of anterior cranial fossa

60
Q

where does middle meningeal a come from and what does it supply

A

branch of maxillary a
meningeal vessles
provides all to supratentorial areas of dura except that of anterior meningeal a

61
Q

What branches supply posterior meningeal aa

A

ascending pharyngeal, occipital, vertebral

62
Q

what n provides pain fibers for floor of cranial vault , anterior and middle fossas, and dural sinuses

A

trigeminal n

63
Q

what n supplies pain fibers to dura of posterior cranial fossa

A

vagus and cervical spinal nn C1, C2 riding with CN XII

Neuro I (9 decks)

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