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BDS2 BAMS oral biology > trigeminal nerve > Flashcards

trigeminal nerve Flashcards

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1
Q

what level of the brain does the trigeminal nerve emerge from

A

mid pons

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2
Q

where is the motor nucleus of CN V located

A

mid pons

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3
Q

what are the 3 sensory CN V nuclei and where are they located

A

mesencephalic nucleus - proprioception - midbrain
chief sensory - discriminative touch - pons
spinal nucleus - pain and temp - medulla

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4
Q

where does the trigeminal ganglion lie

A

meckels cave

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5
Q

from the trigeminal ganglion in meckels cave where do they 3 branches pass through

A

ophthalmic - superior orbital fissure
maxillary - foreamen rotundum
mandibular - foreamen ovale

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6
Q

what are the 3 main branches of the ophthalmic nerve

A

frontal , lacrimal and nasocilliary

ophthalmic nerve supplies forehead, cornea, top of nose etc

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7
Q

where does the maxillary division of the trigeminal nerve branch

A

pterygopalatine fossa

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8
Q

what are the 3 main branches of CN V2

A

zygomatic
infra orbital.
pterygopalatine ganglion

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9
Q

where does the superior alveolar nerve branch from

A

all 3 branches of the superior alveolar nerves come from the infra orbital branch of CN V2

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10
Q

nasopalatine nerve

A

branch of the pterygopalatine ganglion
leaves pterygopalatine fossa via sphenopalatine foreamen (along with the other nasal nerves)
then passes via the incisive canal to reach the anterior hard palate
supplies palatal structures around the 6 anterior maxillary teeth

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11
Q

greater palatine nerve

A

supplies posterior hard palate
enters oral cavity via greater palatine foreamen
branch of the pterygopalatine ganglion , leaves pterygopalatine fossa via the palatine canal

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12
Q

lesser palatine nerve

A

supplies soft palate
enters oral cavity via lesser palatine foreamen
branch of the pterygopalatine ganglion , leaves pterygopalatine fossa via the palatine canal

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13
Q

superior alveolar nerve

A

branch of the infra orbital nerve of CN V2 , there are 3 ..
anterior superior alveolar nerve - supplies anterior teeth and respective buccal gingiva
middle superior alveolar nerve - supplies pre molars and their buccal gingiva
posterior superior alveolar nerve - supplies molars and there buccal gingiva

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14
Q

what are the 3 trunks of the mandibular division of the trigeminal nerve and what are the majority of their fibres

A

main trunk - one motor one sensory
anterior - mostly motor
posterior - mostly sensory

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15
Q

Main trunk of CN V3

A

2 branches , one sensory , one motor
sensory branch - nerves spinosus (meningeal nerve) - innervates dura
motor branch - nerve to medial Pterygoid and and some muscles in middle ear

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16
Q

anterior trunk of CN V3 (4)

A 
mainly motor fibres 
deep temporal nerves - supply temporals 
nerve to lateral Pterygoid
masseteric nerve (masseter) 
buccal nerve ( sensory)
17
Q

posterior trunk of CN V3 (3)

A

mainly sensory fibres
lingual nerve
IAN
auriculotemporal

18
Q

buccal nerve

A

branch of the anterior trunk of CN V3

sensory supply to buccal gingiva of molars and cheek gingiva

19
Q

lingual nerve

A

branch of the posterior trunk of CN V3

sensory to anterior 2/3 of tongue , floor of mouth and lingual gingiva

20
Q

inferior alveolar nerve

A 
enters mandible via mandibular foreamen , supplies all lower teeth (incisive and canines via incisive branch) and they're respective buccal gingiva 
3 branches 
- nerve to mylohyoid 
- incisive 
- mental
21
Q

nerve to mylohyoid

A

motor component of the inferior alveolar nerve

branches off before IAN enters mandible

22
Q

incisive nerve

A

terminal branch of IAN

supplies canines and incisors of mandibular arch

23
Q

mental nerve

A

terminal branch of IAN
exits mandible via mental foreamen
sensory supply to chin , lower lip and buccal gingiva of mandibular anteriors and pre molars

24
Q

auriculotemporal nerve

A

branch of posterior trunk of CN V3

sensory supply to elements of ear

25
Q

shingles

A

infection of a nerve and the skin around it by varicella zoster virus

26
Q

what 2 bone make up the hard palate

A

maxilla and palatine

27
Q

lingula

A

bony triangular process next to mandibular foreamen

28
Q

what divides the tongue into anterior 2/3 and posterior 1/3

A

terminal sulcus

29
Q

what nerve supplies general and special sensory to the posterior 2/3 of the tongue

A

CN IX

glossopharyngeal

30
Q

what nerve supplies general sensory to the anterior 2/3 of the tongue

A

CN V
trigeminal
via the lingual nerve

31
Q

what nerve supplies special sensory to the anterior 2/3 of the tongue

A

CN VII
facial nerve
via chorda tympani which runs along side the lingual nerve of CN V3

32
Q

what nerve supplies the tongue muscle

A

CN XII - hypoglossal supplies all except the palatoglossal muscle which is supplied by CN X (vagus)

BDS2 BAMS oral biology (12 decks)

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