Cranial Nerves High Yield

Question 1

Which CN nuclei lie medially?

Answer 1

III, IV, VI, XII

Factors of 12, except 1 and 2

Question 2

Function of the superior coliculi?

Answer 2

Conjugate vertical gaze

Question 3

Function of inferior colliculi?

Answer 3

auditory

Question 4

Which CN nuclei are located in the midbrain?

Answer 4

III, IV

Question 5

Which CN nuclei are located in pons?

Answer 5

V, VI, VII, VIII

Question 6

Which CN nuclei are located in the medulla?

Answer 6

CN IX, X, XII

Question 7

Which CN nuclei is located in the spinal cord?

Answer 7

XI

Question 8

Where does CN I exit through?

Answer 8

cribiform plate

Question 9

Where does CN II exit through?

Answer 9

optic canal

Question 10

Were dies CN V2 exit through?

Answer 10

Foramen Rotundum

Question 11

Where does CN V3 exit through?

Answer 11

Foramen Ovale

Question 12

Where does the middle meningial artery exit through?

Answer 12

Foramen spinosum

Question 13

What exits through the superior orbital fissure?

Answer 13

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

Question 14

What exits through internal auditory meatus?

Answer 14

CN VII, VIII

Question 15

What exists through jugular foramen?

Answer 15

CN IX, X, XI, jugular vein

Question 16

What exists through hypoglossal canal?

Answer 16

CN XII

Question 17

Where does CN XI exit through?

Answer 17

Foramen magnum

Question 18

Which eye muscles does CN III control?

Answer 18

SR, IR, MR, IO

Accomidation

Levator palpebrae (eyelid opening)

Question 19

Which muscle does the trochlear nerve control?

Answer 19

SO

Question 20

Which nerve innervates the muscles of mastication?

Answer 20

Trigem

Question 21

What are the 3 divisions of trigem?

Answer 21

Ophthalmic
Maxillary
Mandibular

Question 22

What muscle does the abducens nerve control?

Answer 22

LR

Question 23

Which nerve controls facial movement?

Answer 23

CN VII

Question 24

Which nerve innervates the stapedius muscle in the ear?

Answer 24

CN VII

Question 25

Which nerve controls the orbicularis oculi (eyelid closing)?

Answer 25

CN VII

Question 26

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

Answer 26

CN X

Question 27

Which nerve innervates the SCM and trapezius?

Answer 27

CN XI

Question 28

Which nerve innervates tongue movement?

Answer 28

CN XII

Question 29

What is the swallowing center?

Answer 29

Nucleus ambguus

Question 30

Nerves involved in nucleus ambiguus?

Answer 30

IX, V, XI

Question 31

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

Answer 31

Nucleus solitarius

Question 32

What nerves are involved in the nucleus solitarius?

Answer 32

VII, IX, X

Question 33

Afferent and efferent branches of the corneal reflex?

Answer 33

Afferent= V1 (nasocilliary branch) Efferent= VII (Temporal branch)

Question 34

Afferent and Efferent branches of the lacrimal reflex?

Answer 34

Afferent= V1 Efferent= VII

Question 35

Afferent and efferent branches of the jaw jerk?

Answer 35

Afferent= V3 (sensory) Efferent= V3 (motor- masseter)

Question 36

Afferent and efferent branches of the pupillary reflex?

Answer 36

Afferent= II Efferent= III

Question 37

Afferent and efferent branches of the gag reflex?

Answer 37

Afferent= IX Efferent= X

Question 38

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

Answer 38

Away

Question 39

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

Answer 39

turning away (contralateral)

Question 40

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

Answer 40

Ipsilateral side

Question 41

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

Answer 41

Toward

Question 42

Where is the cavernous sinus located?

Answer 42

On either side of the pituitary

Question 43

Where CN nerves pass through the cavernous sinus?

Answer 43

III, IV, V1, VI

Question 44

How does the outer ear transfer sound?

Answer 44

Vibration of eardrum

Question 45

How does middle ear conduct and amplify sound?

Answer 45

ossicles (malleus, incus and stapes)

Question 46

How does the inner ear transmit sound?

Answer 46

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

Question 47

Where are low frequency sounds heard?

Answer 47

Apex

Question 48

Where are high frequency sounds heard?

Answer 48

Base

Question 49

Where are high frequency sounds heard?

Answer 49

Base

Question 50

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

Answer 50

Conduction

Question 51

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

Answer 51

Sensory neuronal

Question 52

What type of lesion: "contralateral paralysis of the lower face and the forehead is spared"

Answer 52

UMN lesino

Question 53

What type of lesion: "ipsilateral paralysis of upper and lower face"

Answer 53

LMN lesion

Question 54

What type of lesion: "peripheral ipsilateral facial nerve paralysis with inability to close eye on involved side"

Answer 54

Facial nerve Palsy (Bell's Palsy)