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Step 1 Review > Cranial Nerves High Yield > Flashcards

Cranial Nerves High Yield Flashcards

1
Q

Which CN nuclei lie medially?

A

III, IV, VI, XII

Factors of 12, except 1 and 2

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2
Q

Function of the superior coliculi?

A

Conjugate vertical gaze

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3
Q

Function of inferior colliculi?

A

auditory

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4
Q

Which CN nuclei are located in the midbrain?

A

III, IV

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5
Q

Which CN nuclei are located in pons?

A

V, VI, VII, VIII

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6
Q

Which CN nuclei are located in the medulla?

A

CN IX, X, XII

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7
Q

Which CN nuclei is located in the spinal cord?

A

XI

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8
Q

Where does CN I exit through?

A

cribiform plate

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9
Q

Where does CN II exit through?

A

optic canal

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10
Q

Were dies CN V2 exit through?

A

Foramen Rotundum

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11
Q

Where does CN V3 exit through?

A

Foramen Ovale

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12
Q

Where does the middle meningial artery exit through?

A

Foramen spinosum

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13
Q

What exits through the superior orbital fissure?

A

CN III, IV, V1 VI, ophthalmic vein, sympathetic fibers

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14
Q

What exits through internal auditory meatus?

A

CN VII, VIII

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15
Q

What exists through jugular foramen?

A

CN IX, X, XI, jugular vein

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16
Q

What exists through hypoglossal canal?

A

CN XII

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17
Q

Where does CN XI exit through?

A

Foramen magnum

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18
Q

Which eye muscles does CN III control?

A

SR, IR, MR, IO

Accomidation

Levator palpebrae (eyelid opening)

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19
Q

Which muscle does the trochlear nerve control?

A

SO

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20
Q

Which nerve innervates the muscles of mastication?

A

Trigem

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21
Q

What are the 3 divisions of trigem?

A

Ophthalmic
Maxillary
Mandibular

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22
Q

What muscle does the abducens nerve control?

A

LR

23
Q

Which nerve controls facial movement?

A

CN VII

24
Q

Which nerve innervates the stapedius muscle in the ear?

A

CN VII

25
Q

Which nerve controls the orbicularis oculi (eyelid closing)?

A

CN VII

26
Q

Nerve that innervates swallowing and soft palate elevation and the uvula?

A

CN X

27
Q

Which nerve innervates the SCM and trapezius?

A

CN XI

28
Q

Which nerve innervates tongue movement?

A

CN XII

29
Q

What is the swallowing center?

A

Nucleus ambguus

30
Q

Nerves involved in nucleus ambiguus?

A

IX, V, XI

31
Q

WHat is the visceral sensory center for taste, baroreceptors and gut distention?

A

Nucleus solitarius

32
Q

What nerves are involved in the nucleus solitarius?

A

VII, IX, X

33
Q

Afferent and efferent branches of the corneal reflex?

A

Afferent= V1 (nasocilliary branch)

Efferent= VII (Temporal branch)

34
Q

Afferent and Efferent branches of the lacrimal reflex?

A

Afferent= V1

Efferent= VII

35
Q

Afferent and efferent branches of the jaw jerk?

A

Afferent= V3 (sensory)

Efferent= V3 (motor- masseter)

36
Q

Afferent and efferent branches of the pupillary reflex?

A

Afferent= II

Efferent= III

37
Q

Afferent and efferent branches of the gag reflex?

A

Afferent= IX

Efferent= X

38
Q

Uvula deviates toward or away from the side of the CN X lesion?

A

Away

39
Q

When an CN XI lesion occurs, is there weakness when turning the head towards or away from the side of the lesion?

A

turning away (contralateral)

40
Q

When an CN XI lesion occurs, is there shoulder droop of contralateral or ipsilateral side of the lesion?

A

Ipsilateral side

41
Q

Does tongue deviate towards or away from the side of lesion?

A

Toward

42
Q

Where is the cavernous sinus located?

A

On either side of the pituitary

43
Q

Where CN nerves pass through the cavernous sinus?

A

III, IV, V1, VI

44
Q

How does the outer ear transfer sound?

A

Vibration of eardrum

45
Q

How does middle ear conduct and amplify sound?

A

ossicles (malleus, incus and stapes)

46
Q

How does the inner ear transmit sound?

A

Basilar membrane vibrates secondary to sound waves–> transduction via har cells–> auditory nerve signaling–> brain stem

47
Q

Where are low frequency sounds heard?

A

Apex

48
Q

Where are high frequency sounds heard?

A

Base

49
Q

Where are high frequency sounds heard?

A

Base

50
Q

What type of hearing loss has an abnormal Rinne test (Bone> air)?

A

Conduction

51
Q

Which type of hearing loss has a weber test that localizes o the unaffected ear?

A

Sensory neuronal

52
Q

What type of lesion:

“contralateral paralysis of the lower face and the forehead is spared”

A

UMN lesino

53
Q

What type of lesion:

“ipsilateral paralysis of upper and lower face”

A

LMN lesion

54
Q

What type of lesion:

“peripheral ipsilateral facial nerve paralysis with inability to close eye on involved side”

A

Facial nerve Palsy (Bell’s Palsy)

Step 1 Review (62 decks)

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