The Cranial Nerves Specific questions

Question 1

Which nerve comes out of the cribriform plate?

Answer 1

Olfactory nerve

Question 2

What are the 5 motor, 4 mixed and 3 sensory nerves?

Answer 2

Motor: 3, 4, 6, 11, 12
Mixed: 5, 7, 9, 10
Sensory: 1, 2 and 8

Question 3

What does the ophthalmic branch off?

Answer 3

Branches off the ICA

Question 4

Which foramen is related to the ophthalmic branch?

Answer 4

Optic canal

Question 5

Which 2 nerves pass through the superior orbital fissure?

Think eye stuff

Answer 5

Think eye stuff so CNIII, CNIV and CNVI

Question 6

Which eye lid muscle does the CNIII innervate?

Answer 6

The upper eyelid called the levator palpebrae superioris

Question 7

Which extra-ocular muscles does CNIII innervate?

Answer 7

Superior rectus
Inferior rectus
Medial Rectus
Inferior Oblique

Question 8

What is the rule of 4?

Answer 8

Above midbrain and midbrain: I, II, III, IV
Pons: V, VI, VII, VIII
Medulla: IX, X, XI, XII

Question 9

If there is a problem with CNIII what happens with eye?

Answer 9

Looks down and out

Question 10

What are the branches of CNV?

Answer 10

3 branches V1, V2, V3
V1: Ophthalmic
V2: Mandibular
V3: Maxillary

Question 11

Where does V1, V2 and V3 come out of?

Answer 11

V1: Ophthalmic, 1/3 of V1 comes out through SOF
V2: Mandibular, foramen rotundum
V3: Maxillary, foramen ovale

Question 12

What comes out of foramen spinosum?

Answer 12

The middle meningeal artery

Question 13

What comes out of foramen ovale?

Answer 13

Maxillary

Question 14

Does the mandibular branch of the CNV come out of foramen rotundum?

Answer 14

YES

Question 15

Masseter, temporalis, lateral pterygoid, buccinators are muscles of what?

Answer 15

Mastication

Question 16

Which CN innervates the muscles of mastication?

Answer 16

Trigeminal nerve CNV

Question 17

Which part of the brain is the CNV located?

Answer 17

PONS

Question 18

What other muscle does the trigeminal nerve innervate besides the muscles of mastication!? HINT T for ____

Answer 18

Tensor tympani

Question 19

The trigeminal nerve is not a mixed CN.

Answer 19

FALSE

Question 20

Which part of the tongue does the trigeminal nerve provide sensation to?

Answer 20

Anterior 2/3

Question 21

Where does the abducens nerve exit?

Answer 21

SOF (superior orbital fissure)

Question 22

What happens to the eye of abducens does not work?

Answer 22

No eye abduction.

Question 23

Which part of the brain is the CNVII located?

Answer 23

PONS

Question 24

What is the pathway of the facial nerve?

Answer 24

Internal acoustic meatus - chorda tympani - stylomastoid foramen - parotid gland (NO INNERVATION)

Question 25

Which 2 nerves travel through the internal acoustic meatus?

Answer 25

CNVII and CNVIII

Question 26

Does the facial nerve provide innervation to the parotid as it passes?

Answer 26

NO

Question 27

What is the main MOTOR function of CNVII?

Answer 27

Facial muscles of expression

Question 28

What other motor functions does the CNVII have? HINT S for Seven.

Answer 28

It innervates the Stapedius of the ear

Question 29

What sensory functions does CNVII have?

Answer 29

It innervates the anterior 2/3 of the tongue for TASTE

Question 30

Which other muscle for the eye does the facial nerve innervate?

Answer 30

Orbicularis occuli, closing eye

Question 31

Which 3 nerves go through the internal jugular foramen?

Answer 31

CNIX, X and XI

Question 32

What does the glossopharyngeal nerve do?

Answer 32

Mixed function

Question 33

CNIX innervates which part of the tongue and for what?

Answer 33

Posterior 1/3 for taste

Question 34

Which muscle is particular to the CNIX which can be easily confused and forgotten?

Answer 34

Stylopharyngeus: elevates the palate

Question 35

Why is CNIX considered to have an autonomic component?

Answer 35

Because it has autonomic innervation to parotid and baroreceptors.

Question 36

Why is the CNX so important? (in terms of its function, motor or sensory)

Answer 36

Motor to all the pharynx, larynx and palatoglossus

Question 37

Which sensory functions does CNX have?

Answer 37

Sensory to pharynx, larynx, eosophagus, shares some of the 1/3 posterior of tongue, baroreceptors

Question 38

Which muscles are innervated by the accessory nerve?

Answer 38

Trapezius, sternoclenomastoid

Question 39

Which muscles are not innervated by the hypoglossal nerve?

Answer 39

Palatoglossus

Question 40

Which nerve controls the palatoglossus

Answer 40

Vagus CNX

Question 41

Where does CNXII exit?

Answer 41

Hypoglossal foramen

Question 42

The pupillary reflexes test which nerves?

Answer 42

2, 3

Question 43

The pupillary tests the _____ of the brain.

Answer 43

Midbrain

Question 44

The corneal reflex tests which nerves?

Answer 44

5, 7

Question 45

How does corneal reflex test the nerves it does?

Answer 45

Optic tracts ride on V1, V1 sends back to the nucleus and sends a neuron to CN7, orbicularis occuli.

Question 46

What is the gag reflex testing?

Answer 46

9, 10

Question 47

How does the gag reflex test the nerves it does?

Answer 47

9 is sensation, 10 is the contraction of muscles.

Question 48

The sensation and taste of the posterior 1/3 of the tongue is innervated by?

Answer 48

Glossopharyngeal

Question 49

The anterior 2/3 of the tongue sensation is innervated by?

Answer 49

Trigeminal

Question 50

The anterior 2/3 of the tongue tasting is innervated by?

Answer 50

Facial