Cranium Anatomy Flashcards Preview

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Flashcards in Cranium Anatomy Deck (41):
1

What passes through the optic canal?

CN II (optic nerve)

2

What is the function of the optic nerve?

carries visual information from the retina of the eye back to the brain (allowing for vision)

3

What passes through the superior orbital fissure?

CN III (occulomotor)
CN IV (trochlear)
CN V1 (branch of the trigeminal)
CN VI (abducens)

4

Which of the nerves that pass though the superior orbital fissure control the orbital muscles that move the eyeand constrict the pupil?

CN III (occulomotor)
CN IV (trochlear)
CN VI (abducens)

5

What is the role of the V1 branch of the trigeminal nerve?

transmits information from the ipsilateral forehead and scalp to the brainstem

6

What passes through the foramen ovale?

V3 of the trigeminal nerve (mandibular branch)

7

What passes through the foramen spinosum?

middle meningeal artery

8

How does the internal carotid artery enter the cranial vault?

carotid foramen--> through a bony canal--> carotid canal

9

Does the internal carotid artery pass through the foramen lacerum?

NO (it is flocked by CT)

10

What passes through the internal auditory meatus?

Cranial nerve VII (facial)
Cranial Nerve VIII (vestibulocochlear)

11

How does the CN VII (facial nerve) exit the calvaria?

stylomastoid foramen

12

How does the CN VIII (vestibulocochlear nerve) exit the cranial vault?

external auditory meatus

13

What exits the skull via the jugular foramen?

CN IX (glossopharyngeal)
CN X (vagus)
CN XI (accessory)

14

Where do the spinal branches of the accessory nerve (CN XI) enter the cranium?

foramen magnum

15

What exits the calvarium via the hypoglossal canal?

CN XII (hypoglossal)

16

What bony prominences in the skull can rub against and injure the brain with rapid acceleration or deceleration?

lesser wing of the sphenoid bone
petrous ridge of the temporal bone

17

What do the external carotid arteries supply?

face, scalp and meninges overlying hte brain

18

How do the internal carotid arteries enter the cranial vault?

ascend and travel through the carotid canal and enter along with the cavernous sinus

19

What occurs as soon as the internal carotid artery is in the cranial vault?

it makes a hairpin turn backwards and splits into the MCA and ACA (middle and anterior cerebral arteries)

20

What arteries branch off near the apex of the hairpin turn of the internal carotid and are considered to be their first branches?

opthalmic arteries

21

What is the origin of the vertebral arteries?

right and left subclavian arteries

22

Through what do the vertebral arteries enter the cranial vault?

foramen magnum

23

Where do the two vertebral arteries join?

at the junction of the medulla and pons

24

What is the artery called that is formed when the vertebral arteries join at the junction of the medulla and pons?

basillar artery

25

What connects the internal carotid artery to the posterior cerebral arteries in the circle of Willis?

posterior communicating arteries

26

What do the anterior communicating arteries connect in the circle of Willis?

anterior cerebral arteries

27

To what vessels do the anterior cerebral arteries attach to to complete the circle?

the internal carotid arteries

28

What are the Medial and lateral lenticulostriate arteries?

tiny branchings of the middle cerebral artery

29

From what artery does the middle cerebral artery arise?

internal carotid artery

30

From what artery do the superior cerebellar arteries arise?

first major arteries from the basillar artery

31

From what artery do the pontine branches arise?

Basillar artery

32

From what artery does the anterior inferior cerebellar artery arise?

Basilar

33

From what artery does the posterior inferior cerebellar artery arise?

Vertebral artery

34

What does the opthalmic artery serve?

orbit

35

What do the middle cerebral arteries supply?

lateral surface of the cortex
Basal Ganglia
Internal Capsule

36

What do the anterior cerebral arteries supply?

medial surface of frontal and parietal lobes

37

What doe the posterior cerebral arteries supply?

medial surface of temporal and occipital lobes
Thalamus (midbrain)

38

What does the basilar artery supply?

pons

39

What do the vertebral arteries supply?

lateral caudal medulla

40

What does the anterior spinal artery supply?

paramedian medulla
anterior 2/3 of spinal cord

41

What do the posterior spinal arteries supply?

posterior columns of medulla
posterior 1/3 of spinal cord