Cranial Nerves

Question 1

what fibres may cranial nerves contain?

Answer 1

> somatic motor fibres
> visceral motor fibres
> visceral sensory fibres
> genera sensory fibres
> special sensory fibres

Question 2

what is cranial 1?

Answer 2

olfactory

Question 3

what foramen does the olfactory nerve pass through?

Answer 3

the cribriform plate of the ethmoid bone

Question 4

what is cranial nerve 2?

Answer 4

optic nerve

Question 5

what foramen does the cranial nerve pass through?

Answer 5

optic canal

Question 6

what can an increase in csf cause to the optic nerve?

Answer 6

papilloedema

Question 7

where would a lesion be to create right sided blindness?

Answer 7

in the right optic nerve

Question 8

where would a lesion be to create bitemporal hemianopia?

Answer 8

in the optic chiasm

Question 9

where would a lesion be to create left homonymous hemianopsia?

Answer 9

right optic tract

Question 10

name cranial nerve three

Answer 10

oculomotor nerve

Question 11

which foramen does the oculomotor (3) pass?

Answer 11

the superior orbital fissure

Question 12

what are the components of the oculomotor nerve?

Answer 12

> somatic motor

> visceral motor

Question 13

what is ptosis?

Answer 13

drooping of the upper eyelid

Question 14

what is the effect of the parasympathetic system via the oculomotor nerve on the pupil and ciliary muscle?

Answer 14

it causes pupillary constriction and accommodation by the ciliary muscle

Question 15

what muscles does the oculomotor nerve innervate?

Answer 15

> medial, superior and inferior rectus
inferior oblique
levator palpebrae superiorus

Question 16

name the IV cranial nerve

Answer 16

trochlear nerve

Question 17

where does cranial nerve IV exit the skull?

Answer 17

at the superior orbital fissure

Question 18

what muscle does the trochlear nerve innervate?

Answer 18

the superior oblique

Question 19

name cranial nerve VI

Answer 19

abducent

Question 20

where does the abducent emerge from in the brain?

Answer 20

between the pons and the medulla

Question 21

what fissure does cranial nerve VI pass through?

Answer 21

superior orbital fissure

Question 22

what muscle does the abducent nerve innervate?

Answer 22

the lateral rectus

Question 23

name cranial nerve V

Answer 23

the trigeminal nerve

Question 24

what three nerve makes up the trigeminal nerve?

Answer 24

ophthalmic V1
maxillary V2
Mandibular V3

Question 25

where does CNV1 exit the skull?

Answer 25

the superior orbital fissure

Question 26

what does the ophthalmic V1 supply?

Answer 26

``` > cornea > forehead > scalp > eyelids > nose > mucosa of nasal cavity > sinuses ```

Question 27

what foramen does CNV2, maxillary nerve pass through?

Answer 27

foramen rotundum

Question 28

what does the maxillary nerve CNV2 supply?

Answer 28

``` > face > teeth > temporomandibular joint > mucosa of nose > maxillary sinuses > palate ```

Question 29

what foramen does the mandibular nerve CNV3 exit the skull through?

Answer 29

foramen ovale

Question 30

what is the sensory innervation of the mandibular nerve?

Answer 30

``` > over mandible > teeth > tmj joint > mucosa of mouth > anterior 2/3rds of tongue ```

Question 31

what muscles are innervated by the mandibular branch of the trigeminal nerve?

Answer 31

> muscles of mastication > digastric > tensor veli palatine > tensor tympani

Question 32

name cranial nerve 7 CNVII

Answer 32

facial nerve

Question 33

where does the facial nerve exit the skull?

Answer 33

the internal acoustic meatus

Question 34

where does the facial nerve emerge from the brain?

Answer 34

between the pons and the medulla

Question 35

what is the motor innervation of the facial nerve?

Answer 35

> muscles of facial expression > stapedius of middle ear > part of digastric muscles

Question 36

what is the visceral motor component of the facial nerve?

Answer 36

> submandibular and sublingual salivary glands > lacrimal glands > nose glands > palate

Question 37

what is the special sensory component of the facial nerve?

Answer 37

taste form anterior 2/3rds of tongue and soft palate

Question 38

what is the general sensory component of the facial nerve?

Answer 38

external acoustic meatus

Question 39

what nerve is affected in bells palsy?

Answer 39

the facial nerve, CNVII

Question 40

where does the vestibulocochlear nerve exit the brain?

Answer 40

between the pons and the medulla

Question 41

name cranial nerve CNVIII

Answer 41

vestibulocochlear nerve

Question 42

where does the vestibulocochlear nerve exit the skull?

Answer 42

the internal acoustic meatus

Question 43

to what does the vestibulocochlear nerve provide sensory information?

Answer 43

> semicircular ducts > uticle > saccule

Question 44

what can occur if there is damage to the vestibulocochlear nerve?

Answer 44

> tinnitus > deafness > vertigo > nystagmus

Question 45

name cranial nerve CNIX

Answer 45

glossopharyngeal nerve

Question 46

where does the glossopharyngeal nerve exit the skull?

Answer 46

the jugular foramen

Question 47

what part of the tongue does the glossopharyngeal nerve innervate?

Answer 47

the posterior 3rd of the tongue

Question 48

what are the general sensory components of the glossopharyngeal nerve?

Answer 48

middle are and posterior oral cavity

Question 49

what are the visceral sensory components of cranial nerve CNIX?

Answer 49

sensation from the carotid body and carotid sinus

Question 50

what nerve innervates the parotid gland?

Answer 50

CNIX glossopharyngeal nerve

Question 51

what is the somatic motor components of the glossopharyngeal nerve CNIX?

Answer 51

to stylopharyngeus helping with swallowing

Question 52

name CNX

Answer 52

vagus nerve

Question 53

where does the vagus nerve exit the skull?

Answer 53

through the jugular foramen

Question 54

what is the visceral motor component of the vagus nerve?

Answer 54

parasympathetic innervation of the bronchi, gut and heart

Question 55

what is the somatic motor component of the vagus nerve?

Answer 55

pharynx, larynx, palate and oesophagus

Question 56

name CNXI

Answer 56

accessory nerve

Question 57

where does the accessory nerve exit the skull?

Answer 57

jugular foramen

Question 58

what are the somatic motor components of the accessory nerve?

Answer 58

> soft palate > pharynx > larynx > scm and trapezius

Question 59

name cranial nerve XII

Answer 59

hypoglossal nerve

Question 60

where does the hypoglossal nerve exit the skull?

Answer 60

the hypoglossal canal

Question 61

what is the somatic motor component of CNXII?

Answer 61

the muscles of the tongue