Skull and Cranial Cavity Flashcards Preview

MD2- Neuroscience Block > Skull and Cranial Cavity > Flashcards

Flashcards in Skull and Cranial Cavity Deck (48):
1

Upper part of cranium?

vault

2

Lower part of cranium?

floor

3

What are the immobilie joints where seperate cranial bones are united?

Sutures

4

What are the cranial bones?

Frontal, temporal, parietal, occipital, sphenoid

5

Name the main sutures uniting the cranial bones?

coronal suture unites the frontal and pareital bones.

saggital suture unites the paired parietal bones.

Lamboid suture unites the occipital and parietal bones.

Pterion suture unites the meeting of the frontal, parietal, temporal and sphenoid bones

6

The pterior has a groove for which important artery?

Middle meningeal artery

7

describe the contours of the frontal bone?

vertical part goes down to superior orbit margins, then turns 90 degrees and goes horizontally going into the orbit and forming the cranial floor.

8

describe contours of parietal bone?

relatively flat, horizontal shaped, and molded to the brains contours.

9

describe occipital bone?

relatively flat, with a bony protuberance that can be felt at the back of the head.

10

describe the temporal bone?

relatively flat, contributes to junction of pteryion.
3 projections of temporal bone:
1.zygomatic process - continuous with cheek bone
2. mastoid process - projecting inferiorly from posterior temporal bone and contributes to muscles of the neck
3. styloid process - positioned medial to zygo and mastoid. sharp, spike appearance.

11

What fissure divides sphenoid bone into greater and lesser wings?

Superior orbital fissure

12

which gland sits in the body of the sphenoid?

pituitary

13

divisions and components of cranial base bones?

Anterior cranial fossa
-horizontal plate of frontal bone
-lesser wing of sphenoid
-cribiform plate

Middle cranial fossa
-greater wing of sphenoid
-petrous part of temporal bone

Posterior cranial fossa
-occipital bone

14

Which cranial fossa contains foramen rotundum, spinosun, and ovale

middle cranial fossa

15

what runs in the optic canal?

optic nerve and ophthalmic artery

16

what sits in the hypophysial fossa?

pituitary gland

17

which nerve runs through the foramen rotundum?

maxillary nerve

18

what nerve runs in the foramen ovale

mandibular nerve

19

what nerves run in the superior orbital fissure?

branches of trigeminal nerve and nerves to extraocular muscles

20

what structure runs in the foramen spinosum?

middle meningeal artery

21

what nerve runs through the cribiform plate?

olfactory nerves

22

what runs through the internal acoustic meatus

facial and vestibulocochlear nerves

23

what runs through the jugular foramen?

cranial nerves 9,10,11 and internal jugular vein

24

what runs through hypoglossal canal?

hypoglossal nerve

25

in which fossa is the foramen magnum located?

posterior fossa

26

in which fossa is the optic canal located?

middle cranial fossa

27

What is cranial nerve 1?

Olfactory

28

cranial nerve II?

optic

29

cranial nerve III?

oculomotor

30

CN IV?

trochlear

31

CN V?

trigeminal

32

CN VI?

abducens

33

CN VII

facial

34

CN VIII?

vestibulocochlear

35

CN IX?

glossopharyngeal

36

CN X?

vagus

37

CN X!

spinal accessory

38

CN XII

hypoglossal

39

which structure prevents rotatory displacement of the brain?

Flax cerebri

40

which structure separates the cerebellum from cebrebral hemisphres

tentorium cerebelli

41

which structures divides right and left cerebellum?

falx cerebelli

42

what are emissary veins?

come from outside of the scalp and drain into the venous sinuses.

43

where is the superior saggital sinus formed

between falx cerebri and skull

44

where is the inferior saggital sinus formed?

along inferior aspect of falx cerebri

45

where is the confluence of sinuses?

at point of junction b/w falx cerebri and tentorium cerebelli. inferior saggital sinus joins with great cerebral vein to become the straight sinus.

46

where is the cavernous sinus?

sits on lateral aspect of body of sphenoid bone

47

in which meningeal space does the middle meningeal artery lie?

extradural space. in the groove of the pteryion. frequently the source cause of extradural hemorrhage.

48

what is the bleed origin of most subdural hematoma's?

tearing occuring where the cerebral veins enter the superior saggital sinus.