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Anatomy > Interior skull > Flashcards

Interior skull Flashcards

1
Q

Main aspects of the cranial cavity

A

Roof and bowl-shaped floor

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2
Q

What makes up the roof of the cranial cavity?

A

Calvaria

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3
Q

What forms the anterior portion of the roof of the cranial cavity?

A

Frontal bone

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4
Q

What formfs the niddle part of theroof of the cranial cavity?

A

Parietal

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5
Q

What forms the posterior part of the roof of the cranial cavity?

A

occipital

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6
Q

Attachment point for falx cerebri on the frontal bone

A

frontal crest that is midline on the frontal bone

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7
Q

Where does the frontal crest terminate?

A

Begininning of the groove for the superior saggital sinus

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8
Q

What are the small pits and depressions in the calvaria that host the arachoid granulaitons?

A

Granular foveolae

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9
Q

Shallowest/most superior cranial fossa

A

Anterior cranial fossa

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10
Q

Attachment point for the falx cerebri on the ethmoid bone

A

Crista galli

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11
Q

Passage for nasal emissary veins

A

Foramen cecum

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12
Q

Passage for axons of olfacotry nerves

A

Cribiform foramina

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13
Q

Passage for ethmoid artery and vein

A

Anterior/posterior ethmoidal foramina

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14
Q

Bones of the middle cranial fossa

A

sphenoid, temporal

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15
Q

Central upper part of the sphenoid body

A

Sella turcica

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16
Q

Anterior boundary of the chiasmatic sulcus

A

Limbus of sphenoid

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17
Q

Where do the optic nerves cross?

A

chiasmatic sulcus

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18
Q

Processes that surround the sella turcica

A

Anterior/posterior clinoid processes

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19
Q

Elevation at the posterior aspect of the chiasmatic sulus

A

tuberculum sellae

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20
Q

Depression housing the pituitary gland

A

hypophysial fossa

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21
Q

Bony ridge projecting superior with posterior clinoid processes as lateral edges

A

Dorsum sellae

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22
Q

Bone that contains grooves for middle meningeal artery

A

squamous temporal

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23
Q

Contains vestibulocochelar apparatus

A

petrous temporal

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24
Q

Forms the optic canal

A

Lesser wing of sphenoid

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25
Q

Runs through optic canal

A

CN2 and ophthalmic artery

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26
Q

Opening between the greater and lesser wings of sphenoid

A

Superior orbital fissure

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27
Q

Vessels running thru the superior orbital fissure

A

CN 3, 4, 5, 6 and ophthalmic veins

28
Q

Opening posterior of medial end of superior orbital fissure

A

foramen rotundum

29
Q

Where does the foramen rotundum open to?

A

pterygopalatine fossa

30
Q

Vessels thru foramen rotundum

A

Maxillary nerve of trigeminal

31
Q

Where does the foramen ovale open to?

A

Infratemporal fossa

32
Q

Vessels thru foramen ovale

A

Mandibular division of trigeminal nerve, lesser petrosal nerve, accessory meningeal artery

33
Q

Where does the foramen spinosum open into?

A

Infratemporal fossa

34
Q

Opening in cranium posteromedial to f. ovale

A

Carotid canal

35
Q

Contents of carotid canal

A

ICA and nerve plexus

36
Q

Opening posteriolateral to hypophyseal fossa

A

F. Lacerum, partially filled with cartilage

37
Q

Largest, deepest, and most inferior cranial fossae

A

Posterior cranial fossa

38
Q

Shallow depression behind the dorsum sella that slopes posteriorly

A

clivus

39
Q

Midline from F. magnum posteriorly to internal occupital protuberance

A

Internal occipital crest

40
Q

Depressions separated by internal occipital crest

A

Deep cerebellar fossae

41
Q

Largest foramen of skull

A

F. Magnum

42
Q

Contents of f. magnum

A

Bratinstem/spinal cord and meninges, vertebral arteries, CN 11

43
Q

Opening at the base of petrous ridge of temporal bone

A

Jugular foramen

44
Q

Contents of jugular foramen

A

CN 9, 10, 11, sigmoid sinus (into the superior bulb of IJV)

45
Q

Anteriosuperior opening to jugular f. within the petrous portion

A

Internal Acoustic Meatus

46
Q

Contents of internal acostic meatus

A

CN 7, 8, labyrinthine artery

47
Q

Opening anteriolateral to F. magnum

A

Hypoglossal canal

48
Q

Sinus lateral to clivus

A

interfior petrosal sinus

49
Q

Sinus between temporal/occipital bones

A

Sigmoid sinus

50
Q

Sinus from internal occipital protuberance to the sigmoid sinus

A

Transverse sinus

51
Q

Layers of Cranial dura mater

A

Periosteal layer, membranous layer

52
Q

Which cranial meningeal layer is not continuous with the spinal meninges?

A

Perosteal layer

53
Q

What produces the CSF in the subarachnoid space of the brain?

A

Choroid plexuses in brain ventricles

54
Q

Where is CSF reabsorbed in the brain?

A

Arachnoid granulations in superior sagittal sinus

55
Q

Portion of inner membranous layer of dura mater that helps to partition and support structures in cranium

A

Dural infoldings

56
Q

Large, sickle-shaped dural infolding that passes between 3 cerebral hemispheres

A

Falx cerebri

57
Q

Separates cerebellum from inferior portion of cerebrum

A

Tentorium cerebelli

58
Q

Endothium-lined space between 3 dural layers

A

Dural venous sinuses

59
Q

Dilated region near the internal occipital protuberance where several dural sinuses meet

A

Confluence of sinuses

60
Q

Nerve that supplies the anterior cranial fossa

A

CN V1

61
Q

Nerve that supplies the tentorium cerebelli

A

CN V1 and 2

62
Q

Nerve that supplies the middle cranial fossa

A

CN V2 and 3

63
Q

Nerve that supplies the posterior cranial fossa

A

Upper cervical nerves and CN 10

64
Q

Extradural hemorrhage

A

Between calvaria and periosteal layer of dura. Typicall meningeal artery rupture due to calvaria Fx. Shows up like a lens shaped hematoma due to dura’s attachments to sutures

65
Q

Subdural hemorrhage

A

Between meningeal layer of dura and arachnoid layer. Typically venous ruptue. Leads to cresent shape. Acute vs chronic

66
Q

Subarachnoid hemorrhage

A

Between subarachnoid space, mixing with CSF. Most common non-traumatic cause is cerebral aneurysm. SS include: acute/severe headaches, nausea, visual distrubances

Anatomy (35 decks)

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