Trigeminal Nerve

Question 1

what does the sensory root of the trigeminal nerve innervate?

Answer 1

skin of face, oral, nasal and sinus, mucosa and teeth

Question 2

what does the motor root of the trigeminal nerve innervate?

Answer 2

muscles of mastication and 3 other muscles

Question 3

what are the 3 divisions of the trigeminal nerve

Answer 3

ophthalmic, maxillary and mandibular

Question 4

what are the 3 foramen involved with the trigeminal nerve?

Answer 4

mental foramen/ mandibular foramen , infraorbital foramen, supraorbital foramen

Question 5

what bones form the hard palate

Answer 5

palatine process of maxilla and horizontal plate of palatine bone

Question 6

where does the trigeminal nerve emerge from on the brainstem?

Answer 6

mid pons

Question 7

where do the sensory nerves of the trigeminal nerve emerge from?

Answer 7

mid pons, mid brain and medulla

Question 8

what does the mesencephalic nucleus on the sensory nerve innervate?

Answer 8

proprioception

Question 9

what does the chief sensory nucleus on the sensory nerve innervate?

Answer 9

discriminative touch

Question 10

what does the spinal nucleus on the sensory nerve innervate?

Answer 10

pain and temperature

Question 11

where does the trigeminal ganglion lie?

Answer 11

the petrous temporal bone in a cave of dura mater (Meckels cave)

Question 12

what does CN V1 pass through?

Answer 12

superior orbital fissure

Question 13

what does CN V2 pass through

Answer 13

foramen rotundum

Question 14

what does CN V3 pass through

Answer 14

foramen ovale

Question 15

what are the divisions of CN V1 (ophthalmic divisions)

Answer 15

frontal nerve -> supraorbital and supratrochlear, lacrimal nerve, nasociliary nerve, infratrochlear nerve

Question 16

what does the ophthalmic nerve supply?

Answer 16

sensory to skin of vertex and upper eyelid and forehead

Question 17

what do the supratrochlear and lacrimal nerve and supraorbital nerves supply?

Answer 17

vertex, forehead and upper eyelids

Question 18

what does the infratrochlear nerve supplies?

Answer 18

skin at medial angle of eye and adjacent root of nose

Question 19

what supplies the tip of the nose?

Answer 19

external nasal branch by anterior ethmoidal branch of nasociliary branch of CN V1

Question 20

what branch of the trigeminal nerve reaches the pterygopalatine fossa?

Answer 20

CN V2

Question 21

what does CN V2 innervate?

Answer 21

lateral forehead, zygomatic region, lower eyelid, side of nose, cheek, upper lip

Question 22

what are the alveolar branches of CN V2

Answer 22

posterior superior alveolar, middle superior alveolar, anterior superior alveolar

Question 23

what are the palatine branches of CN V2

Answer 23

greater and lesser palatine nerves

Question 24

what is the upper gingivae supplied by?

Answer 24

nasopalatine nerve and greater palatine nerve and superior alveolar nerve

Question 25

what is the soft palate supplied by?

Answer 25

lesser palatine nerve

Question 26

what are the branches of CN V2

Answer 26

zygomatic nerve, infra-orbital nerve, palatine nerves, superior alveolar nerve

Question 27

what are the boundaries of the infratemporal fossa?

Answer 27

ramus of mandible, lateral pterygoid plate of sphenoid bone, posterior aspect of maxilla, tympanic plate, mastoid and styloid processes, infratemporal crest of sphenoid bone, angle of mandible

Question 28

what are the 3 parts of the mandibular division?

Answer 28

main trunk, anterior trunk and posterior trunk

Question 29

what is in the main trunk of CN V3

Answer 29

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

Question 30

what is in the anterior trunk of CN V3

Answer 30

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

Question 31

what is in the posterior trunk of CN V3

Answer 31

auriculotemporal nerve, lingual nerve, inferior alveolar nerve

Question 32

what is the sensory nerve supply to oral cavity?

Answer 32

buccal nerve to cheek and lateral gum | IAN to lower teeth, skin and lower lip

Question 33

what does the inferior alveolar nerve give motor innervation to?

Answer 33

mylohyoid and anterior belly of digastric