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BDS2 BAMS oral biology > CNV1 > Flashcards

CNV1 Flashcards

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1
Q

describe the sensory purpose of CNV

A

sensation to the skin of face, oral, nasal sinuses and teeth

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2
Q

where are the greater and lesser palatine foramen?

A

palatine bone

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3
Q

what is the function of foramina?

A

passage of neurovascular structures

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4
Q

which root is bigger?

A

sensory

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5
Q

what is the function of the mesencephalic nucleus?

A

proprioception

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6
Q

what is the function of the chief sensory nucleus?

A

discriminative touch

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7
Q

what is the function of the spinal nucleus?

A

pain and temperature for structures supplied by CNV as well as general conscious sensation for the viscera supplied by CN IX & X

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8
Q

describe the roots emergence

A

from mid-pons and pass forward onto the apex of the petrous temporal bone where trigeminal ganglion lies in cave of dura mater

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9
Q

where would a lesion be if all divisions were affected?

A

pons or cranial base

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10
Q

where does CNV1 leave the root?

A

superior orbital fissure

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11
Q

where does CNV2 leave the root?

A

foramen rotundum

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12
Q

where does CNV3 leave the root?

A

foramen ovale

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13
Q

describe the course of CNV1 (opthalmic)

A

passes anteriorly in the lateral wall of the cavernous sinus to reach the superior orbital fissure

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14
Q

what are the main branches of CNV1?

A

frontal
lacrimal
nasociliary

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15
Q

what does the frontal nerve branch into and what does it supply?

A

supraorbital and supratrochlear

-skin of vertex of vertex & upper eyelid/forehead

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16
Q

where does the lacrimal nerve terminate and what does it supply?

A

lacrimal gland

skin of lateral upper eyelid & forehead

17
Q

what does the nasociliary nerve branch into and what does it supply?

A

long ciliary nerve, anterior and posterior ethmoidal nerves, continues as infratrochlear nerve to skin of medial upper eyelid & root of nose

18
Q

what supplies the vertex, upper eyelids & forehead?

A

supratrochlear, supraorbital and lacrimal nerves

19
Q

what supplies the skin at medial angle of eye and adjacent root of nose?

A

infratrochlear nerve

20
Q

what supplies the skin at tip of nose?

A

anterior ethmoidal nerve as external nasal nerve

21
Q

describe the course of CNV2

A

passes anteriorly in the lateral wall of the cavernous sinus and reach pterygopalatine fossa via the foramen rotundum

22
Q

where is the pterygopalatine fossa?

A

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

23
Q

what are the main branches of CNV2 ?

A

zygomatic

infra-orbital

24
Q

what are the other branches of CNV2?

A

nasopalatine to nasal cavity
greater & lesser palatine to palate
alveolar to upper teeth
pharyngeal to nasopharynx

25
Q

how does CNV2 branch?

A

divides to zygomatic and infraorbital branches into orbit via inferior orbital fissure then emerge through bony foramina to supply skin

26
Q

what does the infraorbital nerve supply?

A

lower eyelid
cheek
nose
upper lip

27
Q

describe the nasopalatine nerve course?

A

enters nasal cavity via the sphenopalatine foramen to reach nasal septum, inferiorly passes via incisive canal to reach anterior hard palate

28
Q

what are the alveolar branches of CNV2?

A

anterior superior alveolar
middle superior alveolar
posterior superior alveolar

29
Q

what are the palatine branches of CNV2?

A

palatine divides into:
lesser palatine
greater palatine

30
Q

what are the upper teeth sensory supply by CNV2?

A

anterior superior alveolar nerve (anterior teeth)
middle superior alveolar nerve (premolars)
posterior superior alveolar nerve (posterior)

31
Q

what are the gingivae sensory supply by CNV2?

A

nasopalatine nerve
anterior superior alveolar
middle superior alveolar
greater palatine

BDS2 BAMS oral biology (12 decks)

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