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Block 5 module 3 > Cranial nerves > Flashcards

Cranial nerves Flashcards

1
Q

all the nuclei are located in the brainstem except CN

A

I, II, XI

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2
Q

CN I, II, VIII are devoted to

A

special sensory input

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3
Q

purely motor

A

III, IV, VI, XI, XII

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4
Q

purely sensory

A

I, II, VIII

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5
Q

mixed

A

V, VII, IX, X

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6
Q

CN III, IX, and X carry

A

sympathetic fibers

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7
Q

CN located in diencephalon

A

I, II

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8
Q

CN located in midbrain

A

III and IV

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9
Q

CN located in pons

A

V, VI VII VIII

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10
Q

CN located in medulla

A

IX, X, XI, XII

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11
Q

innervates striated muscles that are somite derivatives

A 
somatic efferent (GSE)
CN III IV VI
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12
Q

innervate branchial arches derivatives

A

SVE/ branchial efferent V, VII, IX, X, XI

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13
Q

preganglionic parasympathetic components of cranial

division

A

GVE

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14
Q

convey sensation from the alimentary tract, heart, vessels

and lungs by way of nerves IX and X.

A

GVA IX, X

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15
Q

convey sensation from the skin and the mucous membranes

of the head (mainly CN V)

A

GSA

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16
Q

found in CN I (smell), CN II (vision) and CN VIII (hearing and
equilibrium)

A

SSA

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17
Q

most primitive of all CN

A

CN I

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18
Q

CN I does not pass thru

A

thalamus

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19
Q

2 parts of CN I

A

olfactory bulb

olfactory stalk

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20
Q

olfactory stalk carries

A

afferent axons

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21
Q

olfactory bulb lies above the

A

cribriform plate

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22
Q

CN I terminates in

A

primary olfactory cortex and entorhinal cortex

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23
Q

CNI pathway

A

receptor cells - olfactory nerves - O bulb, O stalk, anterior olfactory nucleus

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24
Q

olfactory cells are surrounded by _______ with bowman’s glands that secrete _____

A

sustentacular cells; mucus

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25
Q

_____ are the ones that respond to olfactory chemical stimuli

A

olfactory cilia

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26
Q

2 type of interneurons of olfacotry bulb

A

periglomerular cells

granule cells

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27
Q

receives signals from olfactory sensory neurons an

centrifugal fibers

A

periglomerular cells

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28
Q

most numerous interneurons

A

granule cells

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29
Q

most characteristic feature of the

olfactory bulb in all vertebrates where these elements interact

A

olfactory glomeruli

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30
Q

(SYNAPTIC TRIAD):

A

a. olfactory axon (input fiber)
b. mitral and tufted cells (principal neurons)
c. periglomerular cell (intrinsic neuron)

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31
Q

the olfactory tract/ stalk consists of central axons of the ________ of the
bulb and some centrifugal fibers from the opposite olfactory
bulb

A

mitral and tufted cells

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32
Q

regulate information flow between nearly every region where

odor information processing occurs.

A

Anterior Olfactory Nucleus

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33
Q

center of highest visual acuity

A

fovea

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34
Q

fovea is the center of

A

highest visual acuity

35
Q

CN II optic nerve conveys visual impulses from the

A

retina

36
Q

the optic nerve passes through the _____ to the orbit

A

optic papilla

37
Q

the optic nerve becomes the optic tract after passing through the

A

optic chiasm

38
Q

rods are for _______ vision

A

night (scotopic)

39
Q

cones are for ____ vision

A

day (photopic)

40
Q

CN III oculomotor nerve nucleus is located at

A

midbrain

41
Q

CN III controls

A

eye movement, pupillary constriction

42
Q

axons of oculomotor nucleus supplies all extraocular muscles

muscles except:

A 
Superior oblique (CN IV) and lateral rectus
(CN V)
43
Q

the superior oblique muscle intort the eye when the eye is _____

A

abducted

44
Q

the superior oblique muscle _____ the eye when the eye is adducted

A

depress

45
Q

the only crossed cranial nerve

A

trochlear

46
Q

CN IV is the only one to leave the ____

A

posterior surface of the brainstem

47
Q

CN IV Enters the ________ below CN III and exits the ______ to innervate the superior oblique

A

cavernous sinus; superior

orbital fissure

48
Q

nerve of the 1st pharyngeal arch

A

CN V

49
Q

3 div of CN V

A

opthalmic
maxillary
mandibular

50
Q

the sensory root of CN V arises from the ________ which lies in the _______ lateral to the cavernous sinus

A

Gasserian ganglion; meckel’s cavity

51
Q

the opthalmic division enters the cranium through the

A

superior orbital fissure

52
Q

maxillary div enters through the

A

foramen rotundum

53
Q

mandibular div sonsory enters through the

A

foramen ovale

54
Q

abducens nerve is pure _____

A

GSE nerve

55
Q

CN VI innervates ______ which abduct the eye

A

lateral rectus

56
Q

most frequently injured CN

A

CN VI

57
Q

the abducens has the ____________ among CN

A

longest intracranial course

58
Q

where abducent nerve hangs)

A

clivus

59
Q

increased ICP leads to______ because _______-

A

bilateral nerve palsy; clivus pushed downward

60
Q

the internuclear neurons of CN VI innervates

A

medial rectus

61
Q

the ______ sends parasympathetic preganglionic

fibers to the _____ to innervate the _____ and via the chord tympani nerve to the submandibular and sublingual

A

nervus intermedius; pterygopalatine ganglion; lacrimal

gland

62
Q

internal auditory meatus is the passageway for

A

CN VII and VIII

63
Q

CN VII exits through the

A

styloid foramen

64
Q

CN VII innervates the

A

muscle for facial expression

65
Q

CN VIII arises from the _____ in the labyrinth of the inner ear

A

spiral and vestibular ganglion

66
Q

CN VIII is confined to the

A

temporal bone

67
Q

The primary auditory cortex (areas 41 and 42) includes the _______
on the upper surface of the superior temporal
gyrus.

A

gyrus of Heschl

68
Q

CN IX contains branchial efferents from the ________ to the _________

A

nucleus ambiguous to the stylopharyngeus muscle

69
Q

CN IX supplies general sensation to the

A

pharynx
soft palate
posterior 1/3 of tongue

70
Q

CN XI innervates

A

head and shoulder movement and innervation of laryngeal muscles

71
Q

2 components of CN XI

A

cranial

spinal

72
Q

cranial component of CN XI form the

A

internal branches

73
Q

spinal component of CN XI form the

A

external branches

74
Q

the cranial component of CN xi innervates ________ and is regarded as a
component

A

branchiometric musculature; special visceral efferect (SVE)

75
Q

the spinal component of CN XI innervates the

A

ipsilateral sternocleidomastoid muscle and

upper parts of the trapezius muscle.

76
Q

Paralysis of the upper part of the trapezius muscle – results

A

shoulder drop

77
Q

CN XII mediates

A

tongue movement

78
Q

CN XII innervates

A

ipsilateral half of the tongue

79
Q

CN XII nucleus is located

A

internal to trigonum hypoglossi

80
Q

CN XII nucleus is surrounded by gray matter which contains

A

perihypoglossal nuclei

81
Q

nucleus intercalatus is between

A

hypoglossal nucleus and motor nucleus of vagus

82
Q

normal reflex consisting of retching; may be produced by

touching the soft palate in the back of the mouth

A

gag reflex

83
Q

the movement of the eyes as a unit in the opposite direction

when the head is moved

A

doll’s eye phenomenon

Block 5 module 3 (7 decks)

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