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oral cavity - BDS 1 > cranial nerves 2 :) > Flashcards

cranial nerves 2 :) Flashcards

1
Q

trigeminal nerve divisions

A

ophthalmic
maxillary
mandibular
all sensory, V3 motor

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2
Q

what is the largest cranial nerve

A

trigeminal

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3
Q

where are the cell bodies of the sensory trigeminal nerve

A

trigeminal ganglion

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4
Q

where does the trigemnial nerve arise from

A

lateral border of pons

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5
Q

what does opthalmic branch of trigeminal supply

A

eye and upper part of nasal cavity

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6
Q

what are the 3 divisions of opthalmic branch of CN V

A 
frontal
- skin of forehead
lacrimal
- lateral skin of upper eyelid
nasociliary
- medial upper eyelid
- upper part of nasal cavity
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7
Q

where does V1 pass through

A

superior orbital fissure

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8
Q

where does the maxillary branch pass

A

bony canal

in floor of the orbit and root of maxilary air sinus

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9
Q

what does the maxillary branch provide

A 
sensory innervation 
skin from lower eyelid to upper lip
maxillary yeeth
palate (hard and soft)
nasal cavity
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10
Q

where does V2 enter to supply sensation to lower eyelid and upper lip

A

infraorbital notch/foramen

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11
Q

what is at the cribriform plate and where is it

A

olfactory bulbs

ethenoid bone

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12
Q

what does V2 pass through in skull

A

foramen retundum

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13
Q

what branch is given off by v2 before entering the bony canal

A

posterior superior alveolar nerve

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14
Q

branches v2 from the bony canal

A

anterior superior alveolar nerver

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15
Q

what does mandibular supply sensory

A

skin of lower lip and chin
lower dentiton
anterior 2/3 tongue
floor of mouth

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16
Q

what does mandibular supply motor

A 
muscle of mastication
ie
Masseter
Medial and lateral pterygoids
Temporalis
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17
Q

where does the mandibular branch exit

A

foramen ovale

18
Q

how does V3 enter the mandible bone

A

mandibular foramen

19
Q

branch of mandibular bone

A

inferior alveolar nerve

20
Q

where does anathetic need to be inserted into for IAN

A

before nerve enters the bone

21
Q

where does the inferior alveolar nerve leave and emerge as

A

mental nerve

metnal foramen

22
Q

what are branches of v3

A

IAN

lingual nerve

23
Q

why is the lingual nerve susceptible to damage

A

superficial nerve underneath mucosa

24
Q

clinical test for function of trigeminal nerve

A

sensory -sharp blunt test all divisons
motor - clench teeth palate temporals and masseter muscles
protrube jaw (deviate to injured side if nerve damage)

25
Q

what does facial nerve suppl

A

motoro - muscles of facial expression

special tast sensation to anterior tongue via chord tympani branch

26
Q

what carries general sensation to anterior of tongue

A

lingual nerve

27
Q

where does the facial nerve exit the cranium

A

internal acoustic meatus

branches supplying musclses of mastication exit via the stylomastoid foramen

28
Q

what happens after facial nerve exits cranium

A

branches supply muscles of mastication@ stylomastoid foramen

29
Q

where does the Chorda tympani emerge

A

branch of facial when in bony canal
comes through the stylomastoid formamen
exits via the pertrotympanic fissure and fuses with lingual

30
Q

what does chorda tympani fuse with

A

lingual

31
Q

what innervates sublingual/mandibular glands

A

postganglionic fibres

32
Q

what innervates orbiculares oculi

A

zygomatic

33
Q

what supplies the ring of muscle surrounding the mouth (orbiculares oris)

A

mandibular

34
Q

what does the cervical supply

A

neck

platysma to tense the skin of the neck

35
Q

damage to facial nerve on face

A

individual muscle groups lost dependant on branches damaged

36
Q

damage after middle ear to facial nerve

A

tast and lacrimation intact (branched in bony canal)

facial expression lost on that side)

37
Q

damage between brainstem and middle ear of facial nerve

A

all branches and function lost

38
Q

what does botox do

A

blocks neurotransmission in facial nerve to prevent muscles of facial expression creasing the skin

39
Q

cranial nerevs

A 
olfactory 
optic
occulamotor
trochlear
trigeminal 
abduences
facial
vestbulocochlear
glossopharyngeal 
vagus
accessory 
hypoglossal
40
Q

clinical testing of facial nerve

A

jamie

oral cavity - BDS 1 (66 decks)

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