Cranial nerves 3.3 - 3.5

Question 1

which extraoccular muscles does the occulomotor nerve control 4

Answer 1

superior rectus
inferior rectus
medial rectus
inferior oblique

Question 2

which extraoculomuscle does the abducen nerve control

Answer 2

lateral rectus

Question 3

which extraoccular muscle does the trochlear nerve control (think about where it attaches)

Answer 3

superior oblique

Question 4

what function doe the occulomotor nerve have 4

Answer 4

• control of four extraoocular muscles
• opens eyelid using the levetator palpebrae superioris muscle
• pupil constriction
  -accomodation

Question 5

whcih cranial nerve exit the superior orbital fissure? 4

Answer 5

occulomotor
trochlear
abduences
opthalmic division of trigeminal nerve

Question 6

movement of lacteral rectus

Answer 6

abduction

Question 7

movement of medial rectus

Answer 7

adduction

Question 8

movement of superior rectus 3

Answer 8

elevation (predominant)
intorsion
adduction when working with the inferior rectus

Question 9

movement of inferior rectus 3

Answer 9

depression (predominant)
extortion
adduction when working with the inferior rectus

Question 10

superior oblique movements 3

Answer 10

depression (predominant)
introsion
abduction when working with the inferior oblique

Question 11

inferior oblique movements 3

Answer 11

elevation (predominant)
extorsion
abduction when working with superior oblique

Question 12

consensual light reflex with palsy of optic nerve when shining in affected eye

Answer 12

no constriction in either pupil as no light received

Question 13

consensual light reflex with palsy of occulomotor nerve when shining in affected eye

Answer 13

no constriction in affected eye, consensual response in affected

Question 14

consensual light reflex with palsy of occulomotor nerve when shining in non affected eye

Answer 14

constriction of non affected no consensual constriction

Question 15

consensual light reflex with palsy of optic nerve when shining in non affected eye

Answer 15

constriction of non affected eye and constriction of affected eye due to consensual reflex

Question 16

occulomotor nerve palsy presentation 4

Answer 16

depression, abduction and intorsion
dropping eye lid
dilated pupil
impaired near vision

Question 17

trochlear nerve palsy 2

Answer 17

elevation, extorsion and adduction
double vision

Question 18

abducens nerve palsy

Answer 18

adduction
double vision

Question 19

what cause occulomotor nerve palsy

Answer 19

trantentorial herniation

Question 20

what causes abducens nerve palsy

Answer 20

as it runs a large distance can get damaged at any time

Question 21

divisions of trigeminal nerve 3

Answer 21

opthalmic
maxillary
mandibular

Question 22

what part of the face does the opthalmic trigeminal nerve

Answer 22

eyes + upper face + orbital sinus

Question 23

maxillary division of trigeminal nerve 3

Answer 23

maxilar sinus, skin around eyes and mouth

Question 24

mandibular 3

Answer 24

mandible oral cavity and extrenal ear

Question 25

where does the maxillary dviision of the trigeminal nerve exit from

Answer 25

foramen rotundum

Question 26

where does the mandibular division of the trigeminal nerve exit from

Answer 26

foramen ovale

Question 27

trigeminal neuralgia

Answer 27

- sudden excruciating pain - asociated with neurovascular compression - leads to demyelination and dysregulation of trigeminal nerve as a result

Question 28

branches of the facial nerve motor division 5

Answer 28

temporal zygomatic buccal mandibular cervical

Question 29

exit points of the facial nerve (two)

Answer 29

sensory + parasympathetic exit at facial canal motor portion exits at stylomastoid foramen

Question 30

motor control (bilateral/contralateral) facial nerve

Answer 30

temporal and zygomatic regions are bilateral control buccal, mandibular and cervical are contralateral control

Question 31

function of facial nerve (3 separate roles)

Answer 31

Motor: facial expression Sensory: taste in 2/3rds of tongue Parasympathetic: stimulating lacrimal and salivary glands

Question 32

regions that temporal division of facial nerve innervates

Answer 32

muscles of forehead

Question 33

regions that zygomatic division of motor facial nerve innervates

Answer 33

forceful eye closure

Question 34

regions that the buccal division of motor facial nerve innervates 4

Answer 34

nostril, upper lip, smile, spontaneous blinking

Question 35

regions that mandibular division of facial nerve innervates

Answer 35

lower lip

Question 36

regions that cervical division of facial nerve innervates

Answer 36

lower chin

Question 37

corneal reflex

Answer 37

motor component controlled by facial nerve the sensory component by the trigeminal nerve touch the cornea with a stimuli, sensory afferent via trigeminal, interneuron, motor facial nerve causing blink

Question 38

function of vestibulocochlear nerve 3

Answer 38

balance eye movement in relation to head movement hearing

Question 39

result of lesion to oculomotor nerve 6

Answer 39

abduction depression intorsion drooping eyelid impaired near vision dilated eye

Question 40

occulomotor nerve palsy parasympathetic vs motor affect

Answer 40

parasympathetic fibres more superficial than motor neurons hence parasympathetic fibres may not be affected but motor neurons are deeper hence there may be motor dysfunction without parasympathetic dysfunction

Question 41

trochlear lesion 3

Answer 41

elevated adducts extorts

Question 42

abducens nerve lesion

Answer 42

eye will adduct, cause double vision

Question 43

what is trigeminal neuralgia 2

Answer 43

sudden, excruciating pain due to neurovascular compression of trigeminal root leads to demyelination and dysregulation of trigeminal nerve resulting in dysregulation of AP propogation

Question 44

lesion of facial nerve at facial canal 2

Answer 44

reduced lacrimation loss of tastes sensation

Question 45

facial nerve lesion at stylomastoid foramen 2

Answer 45

absent corneal reflex flaccid paralysis in affected side

Question 46

vestibulocochlear nerve lesion 4

Answer 46

sensorineural hearing loss tinnitus vertigo nystagmus

Question 47

glossopharyngeal and vagus nerve lesion 5

Answer 47

absent gag reflex deviated uvula, away from affected side dysphonia difficulty swallowing decreased salivation

Question 48

accessory nerve lesion 4

Answer 48

weakeness to traps and sternecleidomastoid scapular winging head dropping muscle atrophy

Question 49

hypoglossal lesion

Answer 49

deviation of tongue towards affected side muscle wasting on affected side fasiculations on affected side

Question 50

common cause of oculomotor lesion 2

Answer 50

compression due to transtentorial herniation posterior communicating artery anneurysm or dilatation

Question 51

common cause of abducen lesion

Answer 51

pressure on brainstem stretches nerve against occipital bone

Question 52

cause of trochlear nerve palsy

Answer 52

head injuries

Question 53

three divisions of the trigeminal nerve

Answer 53

opthalmic maxillary mandibular

Question 54

function of trigeminal nerve 2

Answer 54

sensory input from the face motor: muscles of mastication

Question 55

four trigeminal nerve nuclei

Answer 55

mesencephalic main sensory spinal motor

Question 56

facial nerve function 3

Answer 56

motor: muscle of facial expression special sensory: taste of anterior 2/3rds of tongue parasympathetic: innervates lacrimal and salivary glands

Question 57

what are the five motor divisions of the facial nerve

Answer 57

temporal zygomatic buccal mandibular cervical

Question 58

contralateral vs bilateral control in the facial nerve 2

Answer 58

upper face: temporal and zygomatic divisions have bilateral control lower face: buccal and mandibular divisions have contralateral control

Question 59

causes of facial nerve lesions 2

Answer 59

idiopathic acute otitis media

Question 60

function of vestibulocochlear nerve

Answer 60

balance eye movement in relation to head movement hearing

Question 61

function of glossopharyngeal nerve 5

Answer 61

somatic sensory: sensation in posterior 1/3rd of tongue special sensory: taste in posterior 1/3rd of tongue visceral senory: carotid body motor: pharynx and larynx parasympathetic: stimulation of parotid gland

Question 62

function of vagus nerve 4

Answer 62

somatic sensory: sensation of larynx special sensory: epiglottis taste motor: pharynx, larynx, soft palate parasympathetic: bronchi, heart, trachea, gastrointestinal

Question 63

function of accessory

Answer 63

motor: sternocleidomastoid and upper traps

Question 64

function of hypoglossal

Answer 64

motor: innnervation of tongue muscles