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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
Runs through optic canal
CN2 and ophthalmic artery
26
Opening between the greater and lesser wings of sphenoid
Superior orbital fissure
27
Vessels running thru the superior orbital fissure
CN 3, 4, 5, 6 and ophthalmic veins
28
Opening posterior of medial end of superior orbital fissure
foramen rotundum
29
Where does the foramen rotundum open to?
pterygopalatine fossa
30
Vessels thru foramen rotundum
Maxillary nerve of trigeminal
31
Where does the foramen ovale open to?
Infratemporal fossa
32
Vessels thru foramen ovale
Mandibular division of trigeminal nerve, lesser petrosal nerve, accessory meningeal artery
33
Where does the foramen spinosum open into?
Infratemporal fossa
34
Opening in cranium posteromedial to f. ovale
Carotid canal
35
Contents of carotid canal
ICA and nerve plexus
36
Opening posteriolateral to hypophyseal fossa
F. Lacerum, partially filled with cartilage
37
Largest, deepest, and most inferior cranial fossae
Posterior cranial fossa
38
Shallow depression behind the dorsum sella that slopes posteriorly
clivus
39
Midline from F. magnum posteriorly to internal occupital protuberance
Internal occipital crest
40
Depressions separated by internal occipital crest
Deep cerebellar fossae
41
Largest foramen of skull
F. Magnum
42
Contents of f. magnum
Bratinstem/spinal cord and meninges, vertebral arteries, CN 11
43
Opening at the base of petrous ridge of temporal bone
Jugular foramen
44
Contents of jugular foramen
CN 9, 10, 11, sigmoid sinus (into the superior bulb of IJV)
45
Anteriosuperior opening to jugular f. within the petrous portion
Internal Acoustic Meatus
46
Contents of internal acostic meatus
CN 7, 8, labyrinthine artery
47
Opening anteriolateral to F. magnum
Hypoglossal canal
48
Sinus lateral to clivus
interfior petrosal sinus
49
Sinus between temporal/occipital bones
Sigmoid sinus
50
Sinus from internal occipital protuberance to the sigmoid sinus
Transverse sinus
51
Layers of Cranial dura mater
Periosteal layer, membranous layer
52
Which cranial meningeal layer is not continuous with the spinal meninges?
Perosteal layer
53
What produces the CSF in the subarachnoid space of the brain?
Choroid plexuses in brain ventricles
54
Where is CSF reabsorbed in the brain?
Arachnoid granulations in superior sagittal sinus
55
Portion of inner membranous layer of dura mater that helps to partition and support structures in cranium
Dural infoldings
56
Large, sickle-shaped dural infolding that passes between 3 cerebral hemispheres
Falx cerebri
57
Separates cerebellum from inferior portion of cerebrum
Tentorium cerebelli
58
Endothium-lined space between 3 dural layers
Dural venous sinuses
59
Dilated region near the internal occipital protuberance where several dural sinuses meet
Confluence of sinuses
60
Nerve that supplies the anterior cranial fossa
CN V1
61
Nerve that supplies the tentorium cerebelli
CN V1 and 2
62
Nerve that supplies the middle cranial fossa
CN V2 and 3
63
Nerve that supplies the posterior cranial fossa
Upper cervical nerves and CN 10
64
Extradural hemorrhage
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
Subdural hemorrhage
Between meningeal layer of dura and arachnoid layer. Typically venous ruptue. Leads to cresent shape. Acute vs chronic
66
Subarachnoid hemorrhage
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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