Skull and Cranial Cavity Flashcards Preview

Jason's Neuro Block > Skull and Cranial Cavity > Flashcards

Flashcards in Skull and Cranial Cavity Deck (44)
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1
Q

what is in between 2 layers of compact bone of the skull?

A

spongy bone: Diploe

2
Q

3 major sutures:

A

coronal
sagittal
lambdoid

3
Q

pterion is H-shaped fusion of?

A

frontal
sphenoid (greater wing)
parietal
temporal

4
Q

Why is injury to pterion dangerous? 2 reasons

A

thin area

middle meningeal artery grooves under it

5
Q

what demarcates vertical to horizontal transition of frontal bone?

A

supraorbital margin

6
Q

4 projections of the temporal bone are:

A
  1. zygomatic process
  2. mastoid process
  3. styloid
  4. petrous: into cranium (pyramid shaped)
7
Q

where does the pituitary sit?

A

sella turcica of the sphenoid

8
Q

2 structures of ethymoid bone that project into skull?

A

crista galli

cribiform plate

9
Q

superior orbital fissure divides?

A

greater and lesser wings of sphenoid

10
Q

Anterior cranial fossa holds?

A

frontal lobe

lesser wings of sphenoid

11
Q

middle cranial fossa holds?

A

temporal lobes
greater wings of sphenoid
petrous part of temporal bone

12
Q

posterior fossa holds?

A

cerebellum

occipital lobe

13
Q

olfactory nerve goes through what?

A

cribiform plate

14
Q

what’s in the optic canal?

A

optic nerve

ophthalmic artery

15
Q

what goes through cribiform late?

A

olfactory nerve

16
Q

what foramen has the optic nerve

ophthalmic artery?

A

optic canal

17
Q

what contains nerves to extraocular muscles and branches of trigeminal nerve?

A

superior orbital fissure

18
Q

maxillary nerve goes through what?

A

foramen rotundum

19
Q

foramen rotundum structure?

A

maxillary nerve

20
Q

superior orbital fissure contains?

A

nerves to extraocular muscles and branches of trigeminal nerve

21
Q

what goes through foramen spinosum?

A

middle meningeal artery

22
Q

what goes through foramen ovale?

A

mandibular nerve

23
Q

middle meningeal artery foramen?

A

foramen spinosum

24
Q

mandibular nerve foreamen?

A

foramen ovale

25
Q

internal acoustic meatus has what?

A

facial

vestibulocochlear nerve

26
Q

Jugular foramen has? 4 things

A

IX,X,XI internal jugular vein

27
Q

facial

vestibulocochlear nerve goes through?

A

internal acoustic meatus

28
Q

IX,X,XI goes through?

A

jugular foramen

also the internal jugular vein

29
Q

what goes through foramen lacerum?

A

NOTHING!

30
Q

hypoglossal canal?

A

hypoglossal nerve

31
Q

epidural and subdural space real?

A

only potential space

32
Q

purpose of falx and tentorium?

A

restrict rotation of brain

33
Q

falx cerebri attachments?

A

front: crista galli
back: interior of external occipital protuberance

34
Q

what is falx cerebelli?

A

beneath tentorium midline of cerebellum

35
Q

what is diaphragma sellae?

A

roof of sella turcica, covers pituitary

36
Q

3 places sinuses drain venous blood

A

brain
diploe
emissary veins (bad for infection risk on scalp)

37
Q

trace path of inferior saggital sinus

A

tracts backwards, joint great cerebral vein, forms straight sinus, joins confluence of sinuses

38
Q

what is the intercavernous sinus for?

A

pituitary

other important optic structures

39
Q

what happens after the confluence of sinuses?

A

transverse sinus along tentorium horizontally, then sigmoid sinus to internal jugular

40
Q

when does sigmoid sinus start?

A

where tentorium meets petrous part of temporal bone at edge of middle cranial fossa

41
Q

middle meningeal artery is branch of?

A

maxillary artery

42
Q

middle meningeal artery formed where?

A

outside skill

43
Q

middle meningeal artery enters through?

A

foramen spinosum

44
Q

middle meningeal artery does what after enters the skull?

A

split into ant/post and grooves the bone