trigeminal nerve

Question 1

what level of the brain does the trigeminal nerve emerge from

Answer 1

mid pons

Question 2

where is the motor nucleus of CN V located

Answer 2

mid pons

Question 3

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

Answer 3

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

Question 4

where does the trigeminal ganglion lie

Answer 4

meckels cave

Question 5

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

Answer 5

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

Question 6

what are the 3 main branches of the ophthalmic nerve

Answer 6

frontal , lacrimal and nasocilliary

ophthalmic nerve supplies forehead, cornea, top of nose etc

Question 7

where does the maxillary division of the trigeminal nerve branch

Answer 7

pterygopalatine fossa

Question 8

what are the 3 main branches of CN V2

Answer 8

zygomatic
infra orbital.
pterygopalatine ganglion

Question 9

where does the superior alveolar nerve branch from

Answer 9

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

Question 10

nasopalatine nerve

Answer 10

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

Question 11

greater palatine nerve

Answer 11

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

Question 12

lesser palatine nerve

Answer 12

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

Question 13

superior alveolar nerve

Answer 13

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

Question 14

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

Answer 14

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

Question 15

Main trunk of CN V3

Answer 15

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

Question 16

anterior trunk of CN V3 (4)

Answer 16

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

Question 17

posterior trunk of CN V3 (3)

Answer 17

mainly sensory fibres
lingual nerve
IAN
auriculotemporal

Question 18

buccal nerve

Answer 18

branch of the anterior trunk of CN V3

sensory supply to buccal gingiva of molars and cheek gingiva

Question 19

lingual nerve

Answer 19

branch of the posterior trunk of CN V3

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

Question 20

inferior alveolar nerve

Answer 20

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

Question 21

nerve to mylohyoid

Answer 21

motor component of the inferior alveolar nerve

branches off before IAN enters mandible

Question 22

incisive nerve

Answer 22

terminal branch of IAN

supplies canines and incisors of mandibular arch

Question 23

mental nerve

Answer 23

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

Question 24

auriculotemporal nerve

Answer 24

branch of posterior trunk of CN V3

sensory supply to elements of ear

Question 25

shingles

Answer 25

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

Question 26

what 2 bone make up the hard palate

Answer 26

maxilla and palatine

Question 27

lingula

Answer 27

bony triangular process next to mandibular foreamen

Question 28

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

Answer 28

terminal sulcus

Question 29

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

Answer 29

CN IX

glossopharyngeal

Question 30

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

Answer 30

CN V
trigeminal
via the lingual nerve

Question 31

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

Answer 31

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

Question 32

what nerve supplies the tongue muscle

Answer 32

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