Skull and Cranial Cavity Flashcards Preview

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

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

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

spongy bone: Diploe

2

3 major sutures:

coronal
sagittal
lambdoid

3

pterion is H-shaped fusion of?

frontal
sphenoid (greater wing)
parietal
temporal

4

Why is injury to pterion dangerous? 2 reasons

thin area
middle meningeal artery grooves under it

5

what demarcates vertical to horizontal transition of frontal bone?

supraorbital margin

6

4 projections of the temporal bone are:

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

7

where does the pituitary sit?

sella turcica of the sphenoid

8

2 structures of ethymoid bone that project into skull?

crista galli
cribiform plate

9

superior orbital fissure divides?

greater and lesser wings of sphenoid

10

Anterior cranial fossa holds?

frontal lobe
lesser wings of sphenoid

11

middle cranial fossa holds?

temporal lobes
greater wings of sphenoid
petrous part of temporal bone

12

posterior fossa holds?

cerebellum
occipital lobe

13

olfactory nerve goes through what?

cribiform plate

14

what's in the optic canal?

optic nerve
ophthalmic artery

15

what goes through cribiform late?

olfactory nerve

16

what foramen has the optic nerve
ophthalmic artery?

optic canal

17

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

superior orbital fissure

18

maxillary nerve goes through what?

foramen rotundum

19

foramen rotundum structure?

maxillary nerve

20

superior orbital fissure contains?

nerves to extraocular muscles and branches of trigeminal nerve

21

what goes through foramen spinosum?

middle meningeal artery

22

what goes through foramen ovale?

mandibular nerve

23

middle meningeal artery foramen?

foramen spinosum

24

mandibular nerve foreamen?

foramen ovale

25

internal acoustic meatus has what?

facial
vestibulocochlear nerve

26

Jugular foramen has? 4 things

IX,X,XI internal jugular vein

27

facial
vestibulocochlear nerve goes through?

internal acoustic meatus

28

IX,X,XI goes through?

jugular foramen
also the internal jugular vein

29

what goes through foramen lacerum?

NOTHING!

30

hypoglossal canal?

hypoglossal nerve

31

epidural and subdural space real?

only potential space

32

purpose of falx and tentorium?

restrict rotation of brain

33

falx cerebri attachments?

front: crista galli
back: interior of external occipital protuberance

34

what is falx cerebelli?

beneath tentorium midline of cerebellum

35

what is diaphragma sellae?

roof of sella turcica, covers pituitary

36

3 places sinuses drain venous blood

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

37

trace path of inferior saggital sinus

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

38

what is the intercavernous sinus for?

pituitary
other important optic structures

39

what happens after the confluence of sinuses?

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

40

when does sigmoid sinus start?

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

41

middle meningeal artery is branch of?

maxillary artery

42

middle meningeal artery formed where?

outside skill

43

middle meningeal artery enters through?

foramen spinosum

44

middle meningeal artery does what after enters the skull?

split into ant/post and grooves the bone