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CN Nerves 2 Flashcards

1
Q

what are CN 7-12?

A

CN VII: facial
CN VIII: vestibulochochlear
CN IX: glossopharnygeal
CN X: vagus
CN XI: accessory
CN XII: hypoglossal

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2
Q

Label A-C xx

describe path of Facial Nerve:

  • emerges from?
  • passes through which hole?
  • exits skull via?
A

A: internal acoustic meatus
B: external acoustic meatus
C: stylo mastoid foramen

describe path of Facial Nerve:

  • emerges from: pons
  • passes through which hole: internal acoustic meatus
  • exits skull via: stylo mastoid foramen
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3
Q

what are the three main branches of facial nerve (VII), what type of innervation do they provide?

A

greater pertrosal: parasympathetic innervation to lacrimal gland (eye fluid & tears)

chordae typmani:

  • *- special sensory innervation to anterior 2/3rd of tongue;
  • parasympathetic innervation to sublingual and submandibular glands**

motor root: TZBMC (two zulus bit my cat); temporal, zygomatic, buccal, marginal mandibular, cervical: motor muscles of facial expression

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4
Q

which of the following best describes the innervation provided by greater petrosal:

  • sensory only
  • sympathetic only
  • parasympathetic only
  • parasympathetic and sensory
  • sympathetic and sensory
A

which of the following best describes the innervation provided by greater petrosal:

  • sensory only
  • sympathetic only
  • *- parasympathetic only - lacrimal gland = tears**
  • parasympathetic and sensory
  • sympathetic and sensory
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5
Q

which of the following best describes the innervation provided by chorda tympani:

  • sensory only
  • sympathetic only
  • parasympathetic only
  • parasympathetic and sensory
  • sympathetic and sensory
A

which of the following best describes the innervation provided by chorda tympani:

  • sensory only
  • sympathetic only
  • parasympathetic only
  • *- parasympathetic and sensory**
  • sympathetic and sensory
  • *- special sensory innervation to anterior 2/3rd of tongue;
  • parasympathetic innervation to sublingual and submandibular glands**
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6
Q
A
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7
Q

What is A?

  • frontalis
  • oribuclaris oculi
  • oribucalris oris
  • occiptilas
  • buccinator
A

What is A?

  • frontalis
  • oribuclaris oculi
  • oribucalris oris
  • *- occiptilas**
  • buccinator
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8
Q

which of the following is the buccianator?

A
B
C
D
E
F
G

A

which of the following is the buccianator?

A
B
C
D
E
F
​G

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9
Q

which of the following is the masseter?

A
B
C
D
E
F
​G

A

which of the following is the masseter?

A
B
C
D
E
F
​G

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10
Q

which of the following is the frontalis?

A
B
C
D
E
F
​G

A

which of the following is the frontalis?

A
B
C
D
E
F
​G

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11
Q

what are two main causes of facial muscle damage? [2]

A

what are two main causes of facial muscle damage? [2]
bells paulsy
stroke

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12
Q

describe the difference in innervation from facial nerve between upper and lower muscles of face?

A

muscles of upper part of face - frontalis: bilateral innervation - gets innervation from both contralateral and ipsilateral motor cortex ! (upper motor neurons from L & R of brain synapse the lower motor neuron, which innervates the frontalis)

muscles of lower part of face: just contralteral innervation one upper motor neuron from L or R, travel down and decussate and synapses with lower motor neuron

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13
Q

what would you expect to see clinically in a lesion of upper motor neuron in facial nerve? [1]

what would you expect to see clinically in a lesion of lower motor neuron in facial nerve? [1]

A

what would you expect to see clinically in a lesion of upper motor neuron in facial muscles? [1]
paralysis of lower facial musculature

what would you expect to see clinically in a lesion of lower motor neuron in facial nerve? [1]
paralysis of ipsilateral upper and lower faicial muscles

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14
Q

what happens when have Bells palsy?

  • which part of facial nerve is affected?
  • what does this present as?

what happens when have stroke palsy?

  • which part of facial nerve is affected?
  • what does this present as?
A

what happens when have Bells palsy?
- which part of facial nerve is affected: lower motor neuron
​- what does this present as: ipsilateral total paralysis

what happens when have stroke palsy?

  • which part of facial nerve is affected: upper motor neuron
  • what does this present as: contralateral lower muscles paralsis
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15
Q

which part of brainstem does vestibulocholear nerve (CNVIII) come from?

midbrain
pons
medulla

A

which part of brainstem does vestibulocholear nerve (CNVIII) come from?

midbrain
pons
medulla

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16
Q

vestibulocholear nerve (CNVIII):

enters through which hole? [1]
function? [2]

A

vestibulocholear nerve (CNVIII):

enters through which hole: internal acoustic meatus
function: vestibular part: balance; cochlear: hearing

17
Q

which foramen is this?

foramen ovale
foramen spinosum
Internal acoustic meatus
Foramen lacerum
Carotid canal

A

which foramen is this?

foramen ovale
foramen spinosum
Internal acoustic meatus
Foramen lacerum
​carotid canal

18
Q

what signs would you expect?

bitemporal hemianopia
opthalmoplegia
facial paraylsis, vertigo and hearing loss
dysphagia

A

what signs would you expect?

bitemporal hemianopia
opthalmoplegia
facial paraylsis, vertigo and hearing loss
​dysphagia

19
Q

glossophayngeal nerve leaves skull via which foramen?

catorid canal
Jugular foramen
Foramen lacerum
Hypoglossal canal
Foramen magnum:

A

glossophayngeal nerve leaves skull via which foramen?

catorid canal
Jugular foramen
Foramen lacerum
Hypoglossal canal
​Foramen magnum:

20
Q

glossopharnygeal nerve provides which types of innervation?

  • sensory only
  • parasympathetic and special sensory
  • parasympathetic and sensory and motor
  • sympathetic and sensory
  • sensory, motor, special sensory and parasympathetic
A

glossopharnygeal nerve provides which types of innervation?

  • sensory only
  • parasympathetic and special sensory
  • parasympathetic and sensory and motor
  • sympathetic and sensory
  • *- sensory, motor, special sensory and parasympathetic**
21
Q

describe what innervation the glossopharyngeal innervation does for the following x

  • sensory
  • special sensory
  • parasympathetic
  • motor
A

describe what innervation the glossopharyngeal innervation does for the following x

  • sensory: posterior: 1/3rd tongue, carotid body (BP); carotid sinus (o2), pharnyx
  • special sensory: posterior 1/3rd tongue
  • parasympathetic: parotid gland
  • motor: stylophayngeus muscle (
22
Q

vagus nerve provides which types of innervation?

  • sensory only
  • parasympathetic and special sensory
  • parasympathetic and sensory and motor
  • sympathetic and sensory
  • sensory, motor, special sensory and parasympathetic
A

vagus nerve provides which types of innervation?

  • sensory only
  • parasympathetic and special sensory
  • *- parasympathetic and sensory and motor**
  • sympathetic and sensory
  • sensory, motor, special sensory and parasympathetic
23
Q

which part of brainstem does vagus nerve come from?

midbrain
pons
medulla

A

which part of brainstem does vagus nerve come from?

midbrain
pons
medulla

24
Q

describe what innervation the vagus nerve innervation does for the following x

  • sensory
  • parasympathetic
  • motor [4]
A

describe what innervation the vagus innervation does for the following x

  • sensory: larynx (superior laryngeal and recurrent laryngeal nerve)
  • parasympathetic: goes up to midgut
  • motor: soft palate; pharynx; oesphagus; larynx (superior laryngeal and recurrent laryngeal nerve)
25
Q

which foramen does spinal accesory nerve enter and exit brain via? [1]

A

which foramen does spinal accesory nerve enter and exit brain via? [1]

**enters = foramen magnus
exists = jugular foramen**
26
Q

spinal accessory provides which types of innervation?

  • motor only
  • parasympathetic and special sensory
  • parasympathetic and sensory and motor
  • sympathetic and sensory
  • sensory, motor, special sensory and parasympathetic
A

spinal accessory provides which types of innervation?

  • *- motor only**
  • parasympathetic and special sensory
  • parasympathetic and sensory and motor
  • sympathetic and sensory
  • sensory, motor, special sensory and parasympathetic
27
Q

which muscles does the spinal accessory nerve innervate? [2]

how do you test spinal accessory nerve? [2]

A

which muscles does the spinal accessory nerve innervate? [2]
sternocloidomastal
trapezius

how do you test spinal accessory nerve? [2]
turn head
shrug shoulders

28
Q

hypoglossal nerve provides which types of innervation?

  • motor only
  • parasympathetic and special sensory
  • parasympathetic and sensory and motor
  • sympathetic and sensory
  • sensory, motor, special sensory and parasympathetic
A

hypoglossal nerve provides which types of innervation?

  • *- motor only**
  • parasympathetic and special sensory
  • parasympathetic and sensory and motor
  • sympathetic and sensory
  • sensory, motor, special sensory and parasympathetic
29
Q

how do you tell the difference betwen hypoglossal and vagus nerve palsy? [1]

A

how do you tell the difference betwen hypoglossal and vagus nerve palsy? [1]

hypoglossal: deviates t_owards to the lesion (_e.g. if left sided lesion -> tongue goes left)

VN: uvula deviates in opposite direction

30
Q

where does sympathetic innervation to the head come from? [1]

what does disruption to this ^ cause? [1] signs ? [3]

A

where does sympathetic innervation to the head come from? [1]

come up from T1 -> up with the internal carotid artery

what does disruption to this ^ cause? [1] signs ? [3]
horners syndrome;
constricted pupils
anhydrosis (cant sweat)
partial ptosis (drooping of eyelid)

31
Q

which CN is damaged here?

left vagus
right vagus
left hypoglossal
right hypoglossal

A

which CN is damaged here?

left vagus
right vagus
left hypoglossal
right hypoglossal

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