Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Head & Neck > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

CN I

A

olfactory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

CN I location of cell bodies

A

olfactory organ

receptor cells in olfactory epithelium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

CN I pathway

A

receptor cells in olfactory epithelium =>
cribiform plate of ethmoid bone =>
olfactory bulb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

CN I function

A

SVA - sense of smell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

CN I exam

A

test w several different familiar odors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what CN is associated with loss of taste over aging?

A

CN I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what are causes of anosmia (olfactory loss)

A

head trauma
viral infection
intracranial lesions
nasal obstruction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what can occur with fracture of the cribiform plate?

A

CSF leakage through nose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

CN II

A

optic nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

CN II location of cell bodies

A

retina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

CN II pathway

A

optic canal => fibers cross at optic chiasm => optic tracts => thalamus => optic radiations => primary visual cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

CN II function

A

SVA, sight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

a tumor of what organ can cause compression of CN II?

A

pituitary gland

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

CN II exam

A

blink response, pupillary light reflex, peripheral vision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

CN III

A

oculomotor n

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

CN III location of cell bodies

A

midbrain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is transmitted through Edinger-Westphal nucleus?

A

parasympathetic fibers of CN III (oculomotor n.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

CN III pathway

A

midbrain =>
pierces dura lateral to diaphragma sellae =>
runs in lateral wall of cavernous sinus =>
enters orbit via superior orbital fissure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

CN III function (GSE)

A

motor innervation to superior, medial and inferior recti and inferior oblique and levator palpebrae superioris ms
(eye & eyelid movement)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what muscles are innervated by the superior division of CN III? what do they do?

A 
superior rectus (look towards ceiling) 
levator palpebrae superioris (raise eyelid)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what muscles are innervated by the inferior division of CN III? what do they do?

A

inferior & medial recti (look down/medially)

inferior oblique superioris (external rotation and abduction of eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what condition in characterized by a fixed down and out position of the eye and what cranial nerve is involved?

A

oculomotor palsy

CN III

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what sxs are associated w/ oculomotor palsy?

A

strabismus
double vision (diplopia)
ptosis
midriasis (pupil dilation)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

CN IV

A

trochlear n

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

what is the only cranial nerve that exits the midbrain dorsally?

A

CN IV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

CN IV pathway

A

exits dorsal surface of midbrain =>
pierces dura mater =>
run in lateral wall of cavernous sinus =>
enters orbit via superior orbital fissure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

CN IV function

A

GSE - motor innervation to superior oblique m.

=> abduction, depression and medial rotation of eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

CN VI

A

abducens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

CN VI location of cell bodies

A

midbrain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

CN VI pathway

A 
emerges btwn pons and medulla =>
crosses pontine cistern =>
pierces dura covering clivus =>
runs in cavernous sinus near ICA =>
enters orbit via superior orbital fissure
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

CN VI function

A

GSE - motor innervation to lateral rectus

=> abduction of the eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

CN IV palsy sxs

A

eyes crossed, double vision
head tilted away from affected side to compensate
can’t look medially (ie reading)

33
Q

CN VI palsy

A

double vision

can’t look laterally

34
Q

CN VI exam

A

have pt abduct eye

35
Q

CN IV exam

A

have pt adduct eye then look down

36
Q

CN V

A

trigeminal n

37
Q

CN V location of cell bodies

A

pons

38
Q

CN V pathway

A

emerges from pons laterally =>

ganglion in trigeminal cave, lateral to cavernous sinus

39
Q

what are the three branches of CN V

A

ophthalmic (V1)
maxillary (V2)
mandibular (V3)

40
Q

CN V1 pathway and function

A

cavernous sinus => exits skull via superior orbital fissure => GSA to superior face and scalp

41
Q

CN V2 pathway and function

A

cavernous sinus => exits skull via foramen rotundum => GSA to nose upper jaw

42
Q

CN V3 pathway and function

A

exits skull via foramen ovale => GSA to sides of face and mandible

43
Q

CN V function (SVE and GSA)

A

motor to ms. of mastication

sensory to face and scalp

44
Q

CN V1 examination

A

corneal reflex - touch cornea w/ cotton

sensation of forehead & nose

45
Q

CN V2 examination

A

sensation of cheeks

46
Q

CN V3 examination

A

sensation of chin

ability to chew

47
Q

in what condition can trigeminal dermatomes be affected?

A

herpes zoster

48
Q

CN VII

A

facial nerve

49
Q

CN VII location of cell bodies

A

midbrain

50
Q

CN VII pathway

A 
emerges from pontine-medularry jxn =>
traverses posterior cranial fossa =>
exits skull vis internal acoustic meatus=>
runs in facial canal =>
exits via stylomastoid foramen =>
passes through parotid
51
Q

CN VII function (SVE)

A

motor to ms. of facial expression

52
Q

CN VII function (GVE)

A

parasympathetic innervation to lacrimal, nasal and palatine glands
submandibular & sublingual salivary glands

53
Q

CN VII function (SVA & GSA)

A

taste to anterior tongue

sensation to external acoustic meatus

54
Q

terminal branches of facial nerve

A 
posterior auricular
temporal
zygomatic
buccal
marginal mandibular
cervical
55
Q

what cranial nerve is implicated in Bell’s palsy

A

CN VII, facial n

56
Q

what are the sxs of Bell’s palsy

A

cannot blink

drooling

57
Q

CN VIII

A

vestibulocochlear n

58
Q

CN VIII function

A

SSA - hearing and equilibrium

59
Q

sxs associated w/ CN VIII

A 
tinnitus
off balance
nystagmus
deafness
acoustic neuroma
60
Q

what is rombergs sign and what CN does it test?

A

pt falls when feet are together, arms at sides, eyes closed

CN VIII lesion

61
Q

what CN lesion is associated w/ nystagmus

A

CN VIII

62
Q

what CN is evaluated in Weber’s test?

A

CN VIII

63
Q

CN IX

A

glossopharyngeal

64
Q

CN IX location of cell bodies

A

medulla

65
Q

CN IX pathway

A

medulla => exits skull via jugular foramen =>

passes btwn superior & middle pharyngeal constrictors => oral cavity

66
Q

CN IX function

A 
sensation from ear, posterior tongue, 
taste to posterior tongue, 
sensory from oropharyx & carotid body
PNS to parotid
motor to stylopharyngeus ms.
67
Q

CN X

A

vagus n

68
Q

CN X pathway

A

medulla => exits skull via jugular foramen

69
Q

CN X function

A

sensation from dura, ext. auditory canal, viscera, pharynx, larynx
taste from epiglottis
PNS to viscera
motor to pharynx, larynx, palatine ms.

70
Q

CN X testing

A

swallowing reflex
hoarseness
deviation of uvual when saying AH

71
Q

CN XI

A

spinal accessory

72
Q

CN XI function

A

motor to SCM & traps

73
Q

CN XI pathway

A

spinal cord => enters crainium via foramen magum => exit skull via jugular foramen

74
Q

CN XI testing

A

shrug against resistance (traps)

turn head against resistance (SCM)

75
Q

CN XII

A

hypoglossal n

76
Q

CN XII function

A

motor to tongue ms
styloglossus
hypoglossus
genioglossus

77
Q

CN XII pathway

A

medulla => exits skull via hypoglossal canal => travels w cervical plexus => crosses occipital a => enters oral cavity

78
Q

CN XII testing

A

protruded tongue deviates to side of lesion

Head & Neck (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions