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Human Structure Anatomy > Cranial nerves > Flashcards

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
Q

Trigeminal is CN

A

five

26
Q

sensory distribution of CN 5 is

A

primary to skin and head and the upper teeth

27
Q

the motor function of CN5 is

A

to the muscles of mastication

28
Q

the trigeminal originates

A

on the pons

29
Q

what fibers are in the CN 5

A

GSA and SVE

30
Q

effect to the CN5 results in

A

loss of sensation to the face, cornea, mouth and nose
weakness of muscles of mastication (chewing)

31
Q

facial nerve supplies

A

voluntary muscles of the face and scalp

32
Q

Facial nerve carries taste to

A

2/3s of the anterior tongue

33
Q

facial nerve originates at and exits

A

junction of pons with medulla
the skull through the stylomastoid foramen

34
Q

CN 7 innervates what

A

submandibular and sublingual, lacrimal and glands of the nose and palate

35
Q

the efferent limb of CN 7 is

A

corneal reflex

36
Q

what are the fiber types of cn7

A

GVE, SVE, SVA, GVA, GSA

37
Q

what is the effect of a facial nerve lesion

A

depends on the location

38
Q

what are the two parts of CN 8 and what is the name

A

Cochlear root and Vestibular root

Vestibulocochlear

39
Q

CN 8 originates on and exits

A

the medulla
the skull through the auditory meatus

40
Q

what are the functions of CN8 two divisions

A

role in equilibrium and balance and regulates eye movements to coordinate body position

cochear nerve transmits hearing sensation

41
Q

what is the fiber type of CN 8

A

SSA

42
Q

what is the effect of CN 8 lesion

A

loss of balance and vertigo

43
Q

What is CN9 and what does it innervate

A

Glassopharyngeal
sensory to pharynx, middle ear, , post 1/3 of tongue

motor to stylopharyngeus muscle

44
Q

where does CN 9 originate and exit

A

medulla
skill via jugular foramen

45
Q

what is the afferent limb of CN 9

A

gag reflex

46
Q

major function of CN 9 (4)

A

transmits blood pressure
co2 and o2 concentration
taste sensation
mediates salvation and swallowing

47
Q

what is the effect of a lesion on CN 9

A

reduced gag reflex, loss of carotis sinus reflex , reduced taste

48
Q

CN 10 contains what type of fibers and for what

A

sensory fibers
pain and reflex

49
Q

CN 10 originates in the and exits

A

medulla and jugular foramen

50
Q

what is the major motor nerve of cn 10 to

A

pharynx and larynx

51
Q

function of CN 10

A

moves muscles in larynx and pharynx
mediates secretion of gland, taste and sense from thorax and abdomen

52
Q

what is the effect of vagus nerve lesion

A

uvula deviation but it deviates to opposite side of tongue

53
Q

spinal accessory supplies two muscles what are they

A

trapezius and sternocleiodomastoid

54
Q

where does CN 11 originate from and where does it exit

A

spinal cord
jugular foramen posterior to vagus nerve

55
Q

function of CN 11

A

move head and shoulder and some muscles of larynx

56
Q

effects of lesion on CN 11

A

shoulder droops scapular displaced laterally and inability to shrug the shoulder on the affected side

57
Q

what does CN 12 supply and what is the nerve

A

muscles of the tongue
hypoglossal

58
Q

CN 12 originates in the and exits the

A

medulla
hypoglossal canal

59
Q

function of CN 12

A

moves tongue

60
Q

effect of CN 12

A

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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