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Oral Biology BDS2 > Trigeminal Nerve > Flashcards

Trigeminal Nerve Flashcards

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1
Q

what are the 3 branches of the trigeminal nerve?

A

ophthalmic, maxillary and mandibular

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2
Q

what are the 3 exit points of the CN V branches?

A

supra-orbital notch, infra-orbital foramen, mental foramen

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3
Q

what bones make up the hard palate?

A

maxilla and palatine bone

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4
Q

where is the mandibular foramen?

A

on the inner surface of the mandible next to the lingula

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5
Q

where does the trigeminal nerve emerge from in the brainstem?

A

mid pons

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6
Q

where are the CN V nuclei located?

A

midbrain, pons and medulla

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7
Q

which CN V nuclei is located in the midbrain

A

general somatic afferent (sensory)

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8
Q

which CN V nuclei is located in the pons?

A

special visceral efferent and general somatic afferent

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9
Q

which CN V nuclei is located in the medulla?

A

general somatic afferent

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10
Q

where is the only location of the special visceral efferent nuclei of CN V?

A

pons

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11
Q

what type of sensory nuclei does the CN V have?

A

mesencephalic, chief sensory nucleus, spinal nucleus

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12
Q

what type of innervation does CN V have?

A

general sensory for most of the face, special motor for muscles of mastication

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13
Q

once the nerve roots of CN V emerge from the mid-pons where do they go?

A

they pass onto the apex of the petrous temporal bone where the trigeminal ganglion lies in a cave of dura mater (Meckels cave)

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14
Q

once in the trigeminal ganglion where does CN V1 exit?

A

superior orbital fissure

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15
Q

where does CN V2 exit the trigeminal ganglion?

A

foramen rotundum

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16
Q

where does CN V3 exit the trigeminal ganglion?

A

foramen ovale

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17
Q

what are the branches of CN V1

A

frontal, lacrimal and nasociliary

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18
Q

where does the frontal nerve come from and what does it divide into?

A

CN V1 and divides to supraorbital and supratrochlear

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19
Q

what does the frontal nerve (CNV1) supply?

A

skin of vertex and upper eyelid/forehead

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20
Q

where does the lacrimal nerve come from and what does it supply?

A

CN V1 and supplies lacrimal gland, skin of lateral upper eyelid and forehead

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21
Q

what does the nasociliary nerve come from and what does it give off

A

CN V1 and long ciliary nerve, anterior and posterior ethmoidal nerves, infratrochlear nerve

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22
Q

what does the anterior ethmoidal nerve supply and where does it come from?

A

comes from nasociliary nerve of CN V1 and continues as external nasal nerve to supply skin at tip of nose

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23
Q

what does shingles at the tip of the nose warn of?

A

disease developing into cornea

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24
Q

what does CN V2 reach once it goes through the foramen rotundum?

A

pteryogpalatine fossa

25
Q

where does the pterygopalatine fossa lie?

A

just lateral to the upper aspect of the nasal cavity and nasopharynx behind the orbit and above the hard/soft palate

26
Q

what are the branches of CN V2

A

ZYGOMATIC AND INFRA-ORBITAL , nasopalatine, greater and lesser palatine, pharyngeal, alveolar to upper teeth

27
Q

where does the zygomatic nerve come from and what does it split into?

A

CN V2 and splits to zygomaticotemporal and zygomaticofacial

28
Q

where does the infraorbital nerve come from and where does it exit?

A

comes from CN V2 and exits through infra orbital foramen

29
Q

when CN V2 divides, what branches does it divide into and where do they go?

A

zygomatic and infraorbital braches to the orbit through the inferior orbital fissure

30
Q

what does the infraorbital nerve supply

A

lower eyelid, cheek, nose and upper lip

31
Q

where are the branches of the zygomatic nerve?

A

anterior temple and zygoma

32
Q

where does the nasopalatine nerve enter the nasal cavity and where does it go from there

A

sphenopalatine foramen and passes via incisive canal to reach anterior hard palate

33
Q

what are the alveolar branches of CNV2

A

posterior superior alveolar, middle superior alveolar and anterior superior alveolar

34
Q

what are the 2 types of palatine nerves?

A

greater and lesser

35
Q

where do the palatine nerves go

A

through the palatine canal

36
Q

what CN V2 nerves supply the gingivae?

A

nasopalatine, greater palatine nerve through greater and lesser palatine foramen

37
Q

what nerve supplies the soft palate?

A

lesser palatine nerve

38
Q

once CN V2 has passed through the foramen ovale where does it go next?

A

to the infratemporal fossa

39
Q

where does the infratemporal fossa lie in relation to the mandible?

A

posteriorly

40
Q

what are the main branches of CN V3

A

auriculotemporal, buccal, mental, lingual, muscular

41
Q

what are the trunks of CN V3

A

main, anterior, posterior

42
Q

which nerves are part of the main branch of CNV3

A

meningeal branch, branch to tensor tympani, bransh to tensor veli palatini, nerve to medial pterygoid

43
Q

which nerves are part of the anterior branch of CN V3

A

deep temporal nerves, nerve to lateral pterygoid, buccal nerve, masseteric nerve

44
Q

which nerves are part of the posterior branch of CN V3

A

auriculotemporal nerve, lingual nerve, inferior alveolar nerve

45
Q

what is the distribution of CN V3?

A

auricle, temple, lower lip, chin, cheek

46
Q

which nerve supplies general sensation to the floor of mouth along with lower teeth and gums?

A

CN V3

47
Q

which nerve supplies general sensation to the anterior 2/3rd of the tongue?

A

CN V3 via lingual nerve

48
Q

where does trigeminal neuralgia occur?

A

in CN V3 (occasionally CN V2)

49
Q

what does the buccal nerve supply?

A

cheek and lateral gum

50
Q

what does the inferior alveolar nerve supply?

A

lower teeth, skin of chin and lower lip as mental nerve

51
Q

what is the motor component of the inferior alveolar nerve?

A

supplying motor function to the mylohyoid and anterior belly of digastric

52
Q

which nerve supplies the incisors and where does it come from

A

incisive nerve from the inferior alveolar nerve

53
Q

what is the sensory supply of the anterior 2/3rds of tongue?

A

general sensory = mandibular division of CN V

taste = facial nerve

54
Q

which nerve has the motor root for muscles of mastication

A

CN V3

55
Q

explain the jaw jerk reflex

A

sensory information being passed through the trigeminal nerve into mesencephalic nucleus of trigeminal nerve into brainstem, connect to motor nucleus in pons and go to muscles

56
Q

which area of the face does the trigeminal nerve never supply?

A

angle of mandible

57
Q

with shingles, what is a Hutchinsons signs

A

cutaneous involvement of the tip of the nose

58
Q

what does a positive hutchinsons signs mean?

A

increases likelihood of ocular complications

Oral Biology BDS2 (12 decks)

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