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Cranial nerves Flashcards

1
Q

What are the cranial nerves in order

A

olfactory
optic
occulomotor
trochlear
trigeminal
abducens
facial
vestibulocohlear
glassopharyngeal
vagus
spinal accessory
hyoglossal

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2
Q

what nerve is the nerve of small

A

olfactory nerve

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3
Q

olfactory nerve enters through

A

nasal cavity though the cribiform plate

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4
Q

what type of fiber is the olfactory nerve

A

SVA

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5
Q

effect of CN 1 lesion will result in

A

deficit in odor sensation on the same side of legion

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6
Q

what nerve is key for vision

A

optic nerve

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7
Q

Axons project…

A

through the optic chiasm to the superior colliculus and lateral geniculate

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8
Q

CN2 relays info to what

A

cortex

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9
Q

(optic nerve)
fibers on the medial side do what ?
fibers on the later side do what?

A

cross to the opposite side
stay on that side

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10
Q

function of CN2
fiber type
origin
effect of CN2 legion

A

transmit visual stimulus
SSA
ganglion cells of the retina
loss of vision in the affected eye, loss of reflex pupillary constriction

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11
Q

Oculomotor supplies the

A

muscles of the orbit

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12
Q

Oculomotor supplies how many muscles? and which are not

A

5
superior oblique and lateral rectus

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13
Q

function of CN3

A

constricting the pupil and accomodation of the lens for close-up vision

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14
Q

CN3 originates on the
CN3 enters the

A

the midbrain
orbit through the superior orbital fissure

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15
Q

Trochlear supplies

A

one voluntary muscle of the eye and the superior oblique

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16
Q

where does CN4 originates and leave from

A

midbrain
leaves through the skull through the superior orbital fissure

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17
Q

what does Abducens CN6 supplies

A

one muscle

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18
Q

what is the muscle that CN6 supplies

A

lateral rectus of the eye

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19
Q

CN6 originates and exits

A

on the caudal pons and exits the skull through that superior orbital fissure

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20
Q

Fiber types of CN3

A

GSE and GVE

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21
Q

what is the effect of a oculomotor nerve lesion

A

the affected eye would deviate to the opposite side that the lesion is on

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22
Q

function of CN4

A

depresses the eye and looks away from the nose

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23
Q

what fiber type is CN4

A

GSE

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24
Q

effect of trochlear nerve lesion

A

effected eye is extorted and deviated upwards
double vision

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25
Trigeminal is CN
five
26
sensory distribution of CN 5 is
primary to skin and head and the upper teeth
27
the motor function of CN5 is
to the muscles of mastication
28
the trigeminal originates
on the pons
29
what fibers are in the CN 5
GSA and SVE
30
effect to the CN5 results in
loss of sensation to the face, cornea, mouth and nose weakness of muscles of mastication (chewing)
31
facial nerve supplies
voluntary muscles of the face and scalp
32
Facial nerve carries taste to
2/3s of the anterior tongue
33
facial nerve originates at and exits
junction of pons with medulla the skull through the stylomastoid foramen
34
CN 7 innervates what
submandibular and sublingual, lacrimal and glands of the nose and palate
35
the efferent limb of CN 7 is
corneal reflex
36
what are the fiber types of cn7
GVE, SVE, SVA, GVA, GSA
37
what is the effect of a facial nerve lesion
depends on the location
38
what are the two parts of CN 8 and what is the name
Cochlear root and Vestibular root Vestibulocochlear
39
CN 8 originates on and exits
the medulla the skull through the auditory meatus
40
what are the functions of CN8 two divisions
role in equilibrium and balance and regulates eye movements to coordinate body position cochear nerve transmits hearing sensation
41
what is the fiber type of CN 8
SSA
42
what is the effect of CN 8 lesion
loss of balance and vertigo
43
What is CN9 and what does it innervate
Glassopharyngeal sensory to pharynx, middle ear, , post 1/3 of tongue motor to stylopharyngeus muscle
44
where does CN 9 originate and exit
medulla skill via jugular foramen
45
what is the afferent limb of CN 9
gag reflex
46
major function of CN 9 (4)
transmits blood pressure co2 and o2 concentration taste sensation mediates salvation and swallowing
47
what is the effect of a lesion on CN 9
reduced gag reflex, loss of carotis sinus reflex , reduced taste
48
CN 10 contains what type of fibers and for what
sensory fibers pain and reflex
49
CN 10 originates in the and exits
medulla and jugular foramen
50
what is the major motor nerve of cn 10 to
pharynx and larynx
51
function of CN 10
moves muscles in larynx and pharynx mediates secretion of gland, taste and sense from thorax and abdomen
52
what is the effect of vagus nerve lesion
uvula deviation but it deviates to opposite side of tongue
53
spinal accessory supplies two muscles what are they
trapezius and sternocleiodomastoid
54
where does CN 11 originate from and where does it exit
spinal cord jugular foramen posterior to vagus nerve
55
function of CN 11
move head and shoulder and some muscles of larynx
56
effects of lesion on CN 11
shoulder droops scapular displaced laterally and inability to shrug the shoulder on the affected side
57
what does CN 12 supply and what is the nerve
muscles of the tongue hypoglossal
58
CN 12 originates in the and exits the
medulla hypoglossal canal
59
function of CN 12
moves tongue
60
effect of CN 12
weakness or paralysis of the tongue when tongue sticks out it will protrude to the affected side

Human Structure Anatomy (5 decks)

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