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Cranial Nerves Flashcards

1
Q

name the 12 cranial nerves

A
  1. Olfactory
    1. Optic
    2. Oculomotor
    3. Trochlear
    4. Trigeminal
    5. Abducens
    6. Facial
    7. Vestibulocochlear
    8. Glossopharyngeal
    9. Vagus
    10. Accessory
  2. Hypoglossal
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2
Q

function of olfactory nerve

A

smell

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3
Q

exit foramen of olfactory nerve

A

cribiform plate

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4
Q

what type of info does olfactory carry

A

sensory

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5
Q

where does olfactory nerve end

A

temporal lobe - primary olfactory cortex

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6
Q

where is the cribiform plate

A

ethmoid bone

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7
Q

describe the course of the olfactory nerve

A

olfactory epithelium in nasal cavity → olfactory bulb and tract → primary olfactory cortex

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8
Q

function of optic nerve

A

percieve light in the eye

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9
Q

what type of info travels in optic nerve

A

sensory

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10
Q

exit foramen of the optic nerve

A

optic canal

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11
Q

describe the course of the optic nerve

A

retina → optic nerve → optic chiasm → optic tract → lateral geniculate → optic radiations → visual cortex

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12
Q

functions of oculomotor nerve

A

eye movement
dilates pupil
focuses lens

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13
Q

what type of info is carried in the oculomotor nerve

A

motor and autonomic

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14
Q

exit foramen of oculomotor nerve

A

superior orbital fissure

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15
Q

describe the course of the oculomotor nerve

A

anterior midbrain → lateral wall of cavernous sinus → through common tendinous ring → branches into superior and inferior branches

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16
Q

what muscles of eye movement are innervated by the oculomotor nerve

A

levator palpebrae superioris
superior rectus
inferior oblique
inferior rectus
medial rectus

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17
Q

function of levator palpebrae superioris

A

raises eyelid

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18
Q

function of superior rectus

A

elevates the eye

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19
Q

function of inferior oblique

A

abducts eye

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20
Q

function of inferior rectus

A

adducts and depresses eye

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21
Q

function of lateral rectus

A

abducts eye

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22
Q

function of medial rectus

A

adducts eye

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23
Q

function superior oblique

A

abducts and depresses

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24
Q

function of sphincter muscle

A

dilates pupil

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25
Q

function of ciliary muscle

A

focuses pupil

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26
Q

function of trochlear nerve

A

movement of eye
superior oblique

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27
Q

what movement will someone with a trochlear nerve palsy not be able to do

A

look down and out

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28
Q

exit foramen of trochlear nerve

A

superior orbital fissure

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29
Q

describe course of trochlear nerve

A

posterior midbrain → lateral wall of cavernous sinus

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30
Q

is the trochlear nerve within or outwith th common tendinous ring

A

outwith

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31
Q

what type of info does the trochlear nerve carry

32
Q

where does the trigeminal nerve emerge

A

from brainstem lateral to pons

33
Q

what type of info does the trigeminal nerve carry

A

sensory and motor and autonomic

34
Q

what are the branches of the trigeminal nerve

A

ophthalmic - V1
maxillary - V2
mandibular - V3

35
Q

where are the cell bodies of the trigeminal nerve found

A

trigeminal ganglion

36
Q

function of ophthalmic nerve

A

sensation to skin about eye and nasal cavity
dilates pupil

37
Q

what type of info is carried in the ophthalmic nerve

A

sensory and autonomic

38
Q

what is the exit foramen of the ophthalmic nerve

A

superior orbital fissure

39
Q

describe course of ophthalmic nerve

A

lateral wall of cavernous sinus
3 branches before exit

40
Q

what are the 3 branches of the ophthalmic nerve

A

nasociliary
lacrimal
frontal

41
Q

functions of the maxillary nerve

A

sensation to skin between eye, mouth and maxillary teeth
autonomic innervation to lacrimal, nasal palatine and pharyngeal glands

42
Q

what type of info travels in maxillary nerve

A

autonomic
sensory

43
Q

what is the exit foramen for the maxillary nerve

A

foramen rotundum

44
Q

describe the course of the maxillary nerve

A

2 branches → pterygopalatine fossa → 4 more branches

45
Q

what is the function of the mandibular nerve

A

sensation to the temporal region and mandibular teeth
autonomic to salivary glands
muscles of mastication

46
Q

course of mandibular nerve

A

6 branches

47
Q

exit foramen of mandibular nerve

A

foramen ovale

48
Q

function of abducens nerve

A

movement of eye - lateral rectus

49
Q

exit foramen of abducens nerve

A

superior orbital fissure

50
Q

is abducens nerve within or outwith common tendinous ring

51
Q

what type of info does abducens nerve carry

52
Q

functions of facial nerve

A

movement of muscles of facial expression
salivary and lacrimal glands
taste

53
Q

what type of info travels in facial nerve

A

sensory, motor and autonomic

54
Q

what are the branches of the facial nerve

A

temporal
zygomatic
buccal
mandibular
cervical

55
Q

what are the entrance and exit foramen of the facial nerve

A

enters internal acoustic meatus
exits in the stylomastoid foramen

56
Q

describe the course of the facial nerve

A

3 x 90 degree turns within facial canal of temporal bone

57
Q

function of vestibulocochlear nerve

A

balance and hearing

58
Q

what type of info does vestibulocochlear nerve carry

59
Q

exit foramen of vestibulocochlear nerve

A

doesn’t exit as innervated within the bone

60
Q

where does vestibulocochlear nerve enter the bone

A

internal acoustic meaus

61
Q

what nerve does the vestibulocochlear nerve travel with

A

facial nerve

62
Q

what are the functions of the glossopharyngeal nerve

A

sensation to oropharynx, middle ear, carotid body and sinus and posterior third of tongue
motor to stylopharyngeus muscle
autonomic to parotid gland

63
Q

exit foramen of glossopharyngeal nerve

A

jugular foramen

64
Q

describe course of glossopharyngeal nerve

A

runs between internal jugular and common carotid a. in the neck

65
Q

what are the 6 branches of the glossopharyngeal nerve

A

tympanic
stylopharyngeus
tonsillar
pharyngeal
lingual
carotid

66
Q

what type of info does the glossopharyngeal nerve carry

A

sensory, motor and autonomic

67
Q

functions of vagus nerve

A

sensation to ear, larynx and pharynx
movement of pharynx and larynx
parasympathetic to heart and digestive organs

68
Q

what is the exit foramen of the vagus nerve

A

jugular formaen

69
Q

what type of info does vagus nerve carry

A

sensory motor and autonomic

70
Q

function of accessory nerve

A

movement of sternocleidomastoid and trapezius

71
Q

what is the exit foramen of accessory nerve

A

jugular foramen

72
Q

what is the function of the hypoglossal nerve

A

movement of tongue, speech and swallowing

73
Q

what type of info travels in hypoglossal nerve

74
Q

exit foramen of hypoglossal nerve

A

hypoglossal foramen

75
Q

describe course of hypoglossal nerve

A

descends in neck lateral to ICA and ECA

Anatomy (10 decks)

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