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Flashcards in Interior skull Deck (66):
1

Main aspects of the cranial cavity

Roof and bowl-shaped floor

2

What makes up the roof of the cranial cavity?

Calvaria

3

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

Frontal bone

4

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

Parietal

5

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

occipital

6

Attachment point for falx cerebri on the frontal bone

frontal crest that is midline on the frontal bone

7

Where does the frontal crest terminate?

Begininning of the groove for the superior saggital sinus

8

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

Granular foveolae

9

Shallowest/most superior cranial fossa

Anterior cranial fossa

10

Attachment point for the falx cerebri on the ethmoid bone

Crista galli

11

Passage for nasal emissary veins

Foramen cecum

12

Passage for axons of olfacotry nerves

Cribiform foramina

13

Passage for ethmoid artery and vein

Anterior/posterior ethmoidal foramina

14

Bones of the middle cranial fossa

sphenoid, temporal

15

Central upper part of the sphenoid body

Sella turcica

16

Anterior boundary of the chiasmatic sulcus

Limbus of sphenoid

17

Where do the optic nerves cross?

chiasmatic sulcus

18

Processes that surround the sella turcica

Anterior/posterior clinoid processes

19

Elevation at the posterior aspect of the chiasmatic sulus

tuberculum sellae

20

Depression housing the pituitary gland

hypophysial fossa

21

Bony ridge projecting superior with posterior clinoid processes as lateral edges

Dorsum sellae

22

Bone that contains grooves for middle meningeal artery

squamous temporal

23

Contains vestibulocochelar apparatus

petrous temporal

24

Forms the optic canal

Lesser wing of sphenoid

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