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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
name the region and nerves in the region
26
Trigeminal nerve has 3 subdivisions. Name them
- ophthalmic - maxillary - mandibular
27
attachment site of trigeminal nerve
Pons
28
The trigeminal nerve carries _________ for face, nasal and oral cavities, meninges, cornea of eye (part of corneal reflex)
somatosensory
29
motor innervation of trigeminal nerve
muscles of mastication
30
damage to CN V includes:
- Abnormal corneal reflex - Weakness of muscles of mastication - Loss face somatosensation
31
blood supply to cranial nerve V
basilar artery
32
CN VI
abducens
33
cranial nerves that come off the medulla
9 - 12 9 glossopharyngeal 10 vagus 11 spinal accessory 12 hypoglossal
34
CN XII
hypoglossal
35
Hypoglossal nerve attaches to _______ between the _____ and \_\_\_\_\_
- medulla - olive and pyramid
36
Gag reflex afferent limb
stroke to the pharynx -\> CN 9 axons to CN 5 sensory nuclei
37
CN VI attaches to \_\_\_\_\_\_\_\_\_
pontomedullary junction medially
38
abducens nerve carries motor to ________ which moves the eye \_\_\_\_
the lateral rectus muscle - moves laterally abduction
39
clinical signs of CN 6 damage
eye stays midline when tries to move laterally
40
parasympathetic function of CN VII
facial nerve - salivation and lacrimation via the submandibular and pterygopalatine galnglia
41
nucleus of CN VI
abducens nucleus
42
CN V
trigeminal
43
motor function of cranial nerve 7
smile, close eyelid, wrinkle forehead
44
damage to CN 7 clinical signs
1 side of the face is paralyzed
45
contents of white matter in brainstem
ascending and descending tracts as well as local tracts
46
CNs with motor functions
3, 4, 5, 6, 7, 9, 10, 11, 12
47
CN with somatosensory functions
5, 7, 9, 10
48
CN with special sensory functions
1, 2, 7, 8, 9, 10
49
CN with parasympathetic functions
3, 7, 9, 10
50
lesion of the UMN of facial nerve
weakness of contralateral lower half of the face paresis/paralysis
51
lesion of the LMN of the facial nerve
weakness of the ipsilateral half of the face ex; bells palsy
52
53
cranial nerve 8
vestibulocochlear nerve
54
special senses of vestibulocochlear nerve
speical sense of hearing from cochlea and balance from vestibular apparatus (semi circular canals)
55
loss of hearing is damage to what nerve
CN 8 - ipsilateral
56
modalities of glossopharyngeal nerve
- somatosensation - special sense of taste - parasympathetic - motor stylopharyngeus
57
damage to CN 9 clinical sign
abnormal gag reflex
58
motor portion of glossopharyngeal nerve
stylopharyngeus
59
parasympathetic innervation of glossopharygeal nerve
salivary glands
60
cranial nerve 9 nuclei
spinal trigeminal nucleus (pain) ambiguus nucleus (motor)
61
the vagus nerve attaches to the \_\_\_\_\_\_\_\_\_
medulla lateral to the olive
62
modalities that vagus nerve carries
- sensory - motor - parasympathetic
63
vagus nerve sensory innervation
sensory from larynx, pharynx, aortic body/arch
64
vagus nerve carries motor to
soft palate, pharynx (swallow - part of gag reflex), larynx - speak
65
damage to CN 10
abnormal gag reflex, dysphagia, hoarseness
66
efferent limb gag reflex
ambiguus nucleaus is carried by CN 10 to pharyngeal muscles to contract
67
accessory nerve motor innervation
to trapezius and SCM muscles
68
69
cranial nerves may have \_\_\_\_one/many functions?
many!
70
crannial nerve _____ have only one function
nuclei
71
CN I attaches to the ___ not the \_\_\_\_\_
brain not the brainstem
72
cranial nerve nuclei generally will be located in the brainstem at the ________ that the nerve attaches
at the same level
73
Some say marry money but my brother says big brains matter more
sensory sensory motor motor both motor both sensory both both motor motor

Neuro (27 decks)

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