Quiz 8 (exam 2) Flashcards Preview

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Flashcards in Quiz 8 (exam 2) Deck (82):
1

The olfactory nerve is not a true cranial nerve as it is actually part of the ____

Telencephalon

2

What nerve passes through the cribriform plate?

Olfactory fibers. These branch off of the olfactory bulb (part of the olfactory nerve)

3

The optic nerve is not a true cranial nerve as it actually part of the ___

Diencephalon

4

Which cranial nerve has a chiasm?

Optic nerve. Some fibers cross at the chiasm, some do not.

5

After fibers from the ____ nerve pass through the chiasm to go back towards the brain, where do they run?

1) optic

2) optic tract (wraps around the brain stem)

6

The optic nerve leaves the orbit via the ____

Optic canal

7

The oculomotor nerve serves all ocular muscles besides what two muscles?

Lateral rectus

Superior oblique

8

What is the only cranial nerve that crosses relative to its nuclei?

Trochlear nerve

9

What muscle does the abducens nerve innervate?

Lateral rectus

10

What nerve does the trochlear nerve innervate?

Superior oblique

11

Name all 7 muscles that the oculomotor nerve innervates

Superior rectus
Inferior rectus
Medial rectus
Inferior oblique

Lavatory palpebrae superioris

Pupillary sphincter (visceral)
Ciliary muscle (visceral)

12

The oculomotor nerve enters the orbit via the ____.

Superior orbital fissure

13

How does the trochlear nerve enter the orbit?

Superior orbital fissure

14

What is the only nerve to emerge from the dorsal surface?

Trochlear

15

What are the three branches off of the trigeminal nerve?

Opthalmic
Maxillary
Mandibular

16

What are some things that the trigeminal nerve innervates?

Muscles of mastication
Oral floor muscles
Tensor tympani (middle ear)
Tensor veil palatini (pharyngeal)

17

If you pick your nose, what branch of the trigeminal senses that area?

Ophthalmic

18

What branch of the V senses stuff in the nasopharynx?

Maxillary

19

What nerve is responsible for sensation (not taste) of the anterior 2/3 of the tongue?

Mandibular branch of V

20

What nerve is responsible for sensation and taste of the posterior 1/3 of the tongue?

Glossopharyngeal

21

The facial nerve hitch-hikes with the trigeminal nerve. What branches does it hitch-hike? What does it innervate?

V2 and V3 to get to the glands of the face (except for the parotid)

22

What nerve innervates the parotid gland? What branch of trigeminal does it hitch-hike with?

Glossopharyngeal. Hitch-hikes with V3

23

How does the ophthalmic nerve get to where it needs to go?

Goes through the superior orbital fissure to get to the supraorbital notch

24

How does the maxillary branch get to where it needs to go?

Goes through the foramen rotundum.

25

What are the branches of the ophthalmic branch?

Frontal
Lacrimal
Nasociliary

26

True or false... The lacrimal nerve from the ophthalmic branch has motor and sensory functions

False. It only has sensory function

27

What nerves branch from the maxillary branch?

Post/mid/ant. Superior alveolar

Infraorbital

Zygomatic

28

How does the mandibular branch get to where it needs to go?

Foramen ovale

29

What nerves branch off of the mandibular branch? (7)

Pterygoid branches
Auriculotemporal
Deep temporal branch
Lingual
Inferior alveolar
Masseteric branches
Buccal

30

what two nerves runs medial to the mandible?

Lingual and chorda tympani

31

What nerve gives taste sensation to the anterior 2/3 of tongue?

Chorda tympani

32

What nerve enters the mandibular foramen?

Inferior alveolar

33

What muscle innervates the anterior belly of the digastric, pulp of the teeth, and branches into the mental nerve for skin and lip afferents?

Inferior alveolar nerve

34

What branches off of the facial nerve? (7)

Posterior auricular
Buccal
Zygomatic
Temporal
Cervical
Nerve to stapedus
Greater petrosal
Chorda tympani

35

What branch of the facial nerve innervates the nasal and lacrimal glands? How does it get there?

The greater petrosal nerve hitch-hikes with V2

36

What nerve innervates the salivary glands except for the parotid.

Chorda tympani nerve

37

What nerve has vestibular and hearing senses?

Vestibulochochlear

38

How does the glossopharyngeal nerve exit?

Jugular foramen

39

What nerves gives taste sensation to the posterior 1/3 tongue and goes to the chemo and baroreceptors?

Glossopharyngeal and vagus

40

What nerve gives sensation to the outer and middle ear? (Including the tympanic membrane)

Glossopharyngeal

41

What nerve gives taste sensation to the epiglottis/

Vagus

42

What three nerves exit the jugular foramen?

Glossopharyngeal
Vagus
Accessory

43

What is the pathway of the accessory nerve?

Ascends the cord into the skull via foramen magnum. Then exits the jugular foramen

44

What nerve gives motor function to the tongue?

Hypoglossal nerve

45

How does the hypoglossal nerve exit? What artery runs along with it?

Hypoglossal canal

Lingual artery

46

What CN have motor function only?

3, 4, 6, 11, 12

47

What CNs have sensory function only?

1, 2, 8

48

Where is Brocha's area located? What does it do?

Located anterior to the motor cortex of the frontal lobe. Involved in speech.

49

What is Wernicke's area? Where is it located?

Wernicke's area is posterior to the sensory portion of the parietal lobe. It serves to process language

50

What artery goes through the Silvian fissure of the brain?

Middle cerebral artery

51

What may happen if blood flow to the posterior cerebral artery is suppressed?

Loss of vision (it goes to the occipital lobe)

52

What artery is just inferior to the posterior cerebral artery?

Superior cerebellar artery

53

What three arteries serve the cerebellum?

Superior cerebellar
Anterior inferior cerebellar
Posterior inferior cerebellar

54

The anterior communicating artery is in between what two arteries?

Right and left anterior cerebral arteries

55

What CNs are in the Midbrain?

oculomotor and Trochlear

56

What CNs are in the pons?

CNs 5, 6, 7, 8

57

What cranial nerves arise from the medulla?

9,10,11,12

58

What nerve, and portion of the brain stem, is involved with the pupillary light reflex?

Midbrain. Oculomotor nerve

59

What nerves, and portion of the brain stem, is involved in the corneal reflex?

Pons. Trigeminal senses it, Facial nerve causes muscle contraction

60

What nerve, and portion of the brain stem, is involved in the gag reflex?

Medulla, glossopharyngeal nerve senses it, glossopharyngeal and vagus nerve cause muscle contraction

61

What artery supplies the mesencephalon?

Basilar artery
Posterior cerebral artery

62

What artery supplies the metencephalon (pons)?

Basilar artery (almost entirely)
Anterior Inferior Cerebellar artery

Some superior cerebellar

63

What arteries supply the medulla?

Vertebral artery
PICA
Anterior spinal artery (runs in between the vertebral arteries)

64

What artery does the posterior inferior cerebellar artery come off of?

Vertebral artery

65

What artery does the superior cerebellar artery come off of?

Basilar artery

66

What artery does the posterior cerebral artery come off of?

Posterior communicating artery

67

What structure separates the two hemispheres of the brain?

Falx Cerebri

68

What two portions of the brain does the tentorium cerebelli separate?

Occipital lobe and cerebellum

69

How does the middle meningeal artery enter the brain?

Spinosum foramen

70

What is the pterion?

Weak point in the temporal bone. if affected, it can in turn damage the middle meningeal artery

71

What nerve innervates the anterior digastric muscle and mylohyoid (specifically)?

Inferior alveolar nerve (branch of V3)

72

What nerve innervates the stylohyoid and posterior belly of digastric?

Branches of the facial nerve

73

What nerve innervates the parotid gland?

Glossopharyngeal

74

What nerve gives sensory INnervation to the middle ear, external ear, ear canal, and tympanic membrane?

Glossopharyngeal

75

When viewing the cranial nerves, are the sensory neveres more medial or lateral to the motor nerves?

Sensory are more lateral

76

What nerve is generally affected first due to a cavernous thrombosis?

Abducens. Won't be able to do lateral gaze of eye

77

What cranial nerves are found within the cavernous sinus?

2,3,4,5,6

78

What brain structure is also in the cavernous sinus?

Pituitary gland

79

What are the veins that drain the scalp NAD enter the skull?

Parietal and occipital emissary veins

80

A torn middle meningeal artery can result in....

An epidural hematoma

81

Define epidural hematoma

Potential space between dura and skull fills with blood

82

Define subdural hematoma. Injury to what structure can cause this?

Potential space between dura mater and arachnoid mater fills with blood. Due to injury to bridging veins