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Neuro > cranial nerves part 1 > Flashcards

cranial nerves part 1 Flashcards

1
Q

cranial nerve I

A

olfactory

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2
Q

function of CN I

A

It sends special sense of smell information into the cortex so that we are aware of smells.

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3
Q

old parts of brain that CN 1 sends information to

A
  • limbic system to be used in emotional, feeding, and sexual circuits
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4
Q

CN II

A

optic

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5
Q

Optic nerve carries special sense of _____

A

vision

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6
Q

All visual info from left visual field crosses to _______

A

right brain

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7
Q

Neurons in retina send axons through ______ to the _______ where some axons decussate and follow the _______ to sort out the visual information from both eyes.

A

-optic nerve -optic chiasm - optic tract

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8
Q

visual information goes to the thalamus at this nucleus and then sends information to the ________

A
  • lateral geniculate nucleus - visual cortex in occipital love
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9
Q

structures that the olfactory nerve innervates

A

olfactory epithelium via olfactory bulb

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10
Q

structures that the optic nerve innervates

A

retina

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11
Q

CN III

A

Oculomotor

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12
Q

Oculomotor nerve attaches to the ______

A

midbrain

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13
Q

oculomotor nerve carries:

A
  • motor to 4 of the 6 eye movement muscles - motor to eyelid raising muscle (Levator Palpebrae) - parasympathetics to ciliary ganglion accommodation and pupil constriction
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14
Q

damage to CN III

A

-Eye looks down and out -Eyelid droops (ptosis) -Pupil dilates

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15
Q

Oculomotor nerve carries motor to _________ and ___________

A

eyelid raising muscle (Levator Palpebrae) and 4 of 6 eye movement muscles

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16
Q

parasympathetic function of oculomotor nerve

A

ciliary ganglion - accomodati and pupil constriction

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17
Q

nuclei of CN III

A
  • Edinger-Westphal nucleus - parasympathetic
  • oculomotor nucleus - motor function
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18
Q

CN IV

A

trochlear nerve

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19
Q

trochlear nerve attaches to _______

A

dorsal midbrain

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20
Q

trochlear nerve carries _____ to the _____ in the eye

A

motor to the superior oblique muscle in the eye

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21
Q

function of superior oblique muscle

A

moves eye in complex downward direction

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22
Q

damage to CN IV shows

A

the eye looks up

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23
Q

nuclei of CN and level at brainstem _____

A

trochlear nucleus at the level of the inferior nuclei

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24
Q

the only CN that decussates

A

IV trochlear

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25
Q

name the region and nerves in the region

A
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26
Q

Trigeminal nerve has 3 subdivisions. Name them

A
  • ophthalmic
  • maxillary
  • mandibular
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27
Q

attachment site of trigeminal nerve

A

Pons

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28
Q

The trigeminal nerve carries _________ for face, nasal and oral cavities, meninges, cornea of eye (part of corneal reflex)

A

somatosensory

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29
Q

motor innervation of trigeminal nerve

A

muscles of mastication

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30
Q

damage to CN V includes:

A
  • Abnormal corneal reflex
  • Weakness of muscles of mastication
  • Loss face somatosensation
31
Q

blood supply to cranial nerve V

A

basilar artery

32
Q

CN VI

A

abducens

33
Q

cranial nerves that come off the medulla

A

9 - 12

9 glossopharyngeal

10 vagus

11 spinal accessory

12 hypoglossal

34
Q

CN XII

A

hypoglossal

35
Q

Hypoglossal nerve attaches to _______ between the _____ and _____

A
  • medulla
  • olive and pyramid
36
Q

Gag reflex afferent limb

A

stroke to the pharynx -> CN 9 axons to CN 5 sensory nuclei

37
Q

CN VI attaches to _________

A

pontomedullary junction medially

38
Q

abducens nerve carries motor to ________ which moves the eye ____

A

the lateral rectus muscle - moves laterally abduction

39
Q

clinical signs of CN 6 damage

A

eye stays midline when tries to move laterally

40
Q

parasympathetic function of CN VII

A

facial nerve - salivation and lacrimation via the submandibular and pterygopalatine galnglia

41
Q

nucleus of CN VI

A

abducens nucleus

42
Q

CN V

A

trigeminal

43
Q

motor function of cranial nerve 7

A

smile, close eyelid, wrinkle forehead

44
Q

damage to CN 7 clinical signs

A

1 side of the face is paralyzed

45
Q

contents of white matter in brainstem

A

ascending and descending tracts as well as local tracts

46
Q

CNs with motor functions

A

3, 4, 5, 6, 7, 9, 10, 11, 12

47
Q

CN with somatosensory functions

A

5, 7, 9, 10

48
Q

CN with special sensory functions

A

1, 2, 7, 8, 9, 10

49
Q

CN with parasympathetic functions

A

3, 7, 9, 10

50
Q

lesion of the UMN of facial nerve

A

weakness of contralateral lower half of the face

paresis/paralysis

51
Q

lesion of the LMN of the facial nerve

A

weakness of the ipsilateral half of the face ex; bells palsy

52
Q
A
53
Q

cranial nerve 8

A

vestibulocochlear nerve

54
Q

special senses of vestibulocochlear nerve

A

speical sense of hearing from cochlea and balance from vestibular apparatus (semi circular canals)

55
Q

loss of hearing is damage to what nerve

A

CN 8 - ipsilateral

56
Q

modalities of glossopharyngeal nerve

A
  • somatosensation
  • special sense of taste
  • parasympathetic
  • motor stylopharyngeus
57
Q

damage to CN 9 clinical sign

A

abnormal gag reflex

58
Q

motor portion of glossopharyngeal nerve

A

stylopharyngeus

59
Q

parasympathetic innervation of glossopharygeal nerve

A

salivary glands

60
Q

cranial nerve 9 nuclei

A

spinal trigeminal nucleus (pain)

ambiguus nucleus (motor)

61
Q

the vagus nerve attaches to the _________

A

medulla lateral to the olive

62
Q

modalities that vagus nerve carries

A
  • sensory
  • motor
  • parasympathetic
63
Q

vagus nerve sensory innervation

A

sensory from larynx, pharynx, aortic body/arch

64
Q

vagus nerve carries motor to

A

soft palate, pharynx (swallow - part of gag reflex), larynx - speak

65
Q

damage to CN 10

A

abnormal gag reflex, dysphagia, hoarseness

66
Q

efferent limb gag reflex

A

ambiguus nucleaus is carried by CN 10 to pharyngeal muscles to contract

67
Q

accessory nerve motor innervation

A

to trapezius and SCM muscles

68
Q
A
69
Q

cranial nerves may have ____one/many functions?

A

many!

70
Q

crannial nerve _____ have only one function

A

nuclei

71
Q

CN I attaches to the ___ not the _____

A

brain

not the brainstem

72
Q

cranial nerve nuclei generally will be located in the brainstem at the ________ that the nerve attaches

A

at the same level

73
Q

Some say marry money but my brother says big brains matter more

A

sensory

sensory

motor

motor

both

motor

both

sensory

both

both

motor

motor

Neuro (27 decks)

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