CNV1

Question 1

describe the sensory purpose of CNV

Answer 1

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

Question 2

where are the greater and lesser palatine foramen?

Answer 2

palatine bone

Question 3

what is the function of foramina?

Answer 3

passage of neurovascular structures

Question 4

which root is bigger?

Answer 4

sensory

Question 5

what is the function of the mesencephalic nucleus?

Answer 5

proprioception

Question 6

what is the function of the chief sensory nucleus?

Answer 6

discriminative touch

Question 7

what is the function of the spinal nucleus?

Answer 7

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

Question 8

describe the roots emergence

Answer 8

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

Question 9

where would a lesion be if all divisions were affected?

Answer 9

pons or cranial base

Question 10

where does CNV1 leave the root?

Answer 10

superior orbital fissure

Question 11

where does CNV2 leave the root?

Answer 11

foramen rotundum

Question 12

where does CNV3 leave the root?

Answer 12

foramen ovale

Question 13

describe the course of CNV1 (opthalmic)

Answer 13

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

Question 14

what are the main branches of CNV1?

Answer 14

frontal
lacrimal
nasociliary

Question 15

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

Answer 15

supraorbital and supratrochlear

-skin of vertex of vertex & upper eyelid/forehead

Question 16

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

Answer 16

lacrimal gland

skin of lateral upper eyelid & forehead

Question 17

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

Answer 17

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

Question 18

what supplies the vertex, upper eyelids & forehead?

Answer 18

supratrochlear, supraorbital and lacrimal nerves

Question 19

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

Answer 19

infratrochlear nerve

Question 20

what supplies the skin at tip of nose?

Answer 20

anterior ethmoidal nerve as external nasal nerve

Question 21

describe the course of CNV2

Answer 21

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

Question 22

where is the pterygopalatine fossa?

Answer 22

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

Question 23

what are the main branches of CNV2 ?

Answer 23

zygomatic

infra-orbital

Question 24

what are the other branches of CNV2?

Answer 24

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

Question 25

how does CNV2 branch?

Answer 25

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

Question 26

what does the infraorbital nerve supply?

Answer 26

lower eyelid cheek nose upper lip

Question 27

describe the nasopalatine nerve course?

Answer 27

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

Question 28

what are the alveolar branches of CNV2?

Answer 28

anterior superior alveolar middle superior alveolar posterior superior alveolar

Question 29

what are the palatine branches of CNV2?

Answer 29

palatine divides into: lesser palatine greater palatine

Question 30

what are the upper teeth sensory supply by CNV2?

Answer 30

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

Question 31

what are the gingivae sensory supply by CNV2?

Answer 31

nasopalatine nerve anterior superior alveolar middle superior alveolar greater palatine