trigeminal nerve Flashcards
what level of the brain does the trigeminal nerve emerge from
mid pons
where is the motor nucleus of CN V located
mid pons
what are the 3 sensory CN V nuclei and where are they located
mesencephalic nucleus - proprioception - midbrain
chief sensory - discriminative touch - pons
spinal nucleus - pain and temp - medulla
where does the trigeminal ganglion lie
meckels cave
from the trigeminal ganglion in meckels cave where do they 3 branches pass through
ophthalmic - superior orbital fissure
maxillary - foreamen rotundum
mandibular - foreamen ovale
what are the 3 main branches of the ophthalmic nerve
frontal , lacrimal and nasocilliary
ophthalmic nerve supplies forehead, cornea, top of nose etc
where does the maxillary division of the trigeminal nerve branch
pterygopalatine fossa
what are the 3 main branches of CN V2
zygomatic
infra orbital.
pterygopalatine ganglion
where does the superior alveolar nerve branch from
all 3 branches of the superior alveolar nerves come from the infra orbital branch of CN V2
nasopalatine nerve
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
greater palatine nerve
supplies posterior hard palate
enters oral cavity via greater palatine foreamen
branch of the pterygopalatine ganglion , leaves pterygopalatine fossa via the palatine canal
lesser palatine nerve
supplies soft palate
enters oral cavity via lesser palatine foreamen
branch of the pterygopalatine ganglion , leaves pterygopalatine fossa via the palatine canal
superior alveolar nerve
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
what are the 3 trunks of the mandibular division of the trigeminal nerve and what are the majority of their fibres
main trunk - one motor one sensory
anterior - mostly motor
posterior - mostly sensory
Main trunk of CN V3
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
anterior trunk of CN V3 (4)
mainly motor fibres deep temporal nerves - supply temporals nerve to lateral Pterygoid masseteric nerve (masseter) buccal nerve ( sensory)
posterior trunk of CN V3 (3)
mainly sensory fibres
lingual nerve
IAN
auriculotemporal
buccal nerve
branch of the anterior trunk of CN V3
sensory supply to buccal gingiva of molars and cheek gingiva
lingual nerve
branch of the posterior trunk of CN V3
sensory to anterior 2/3 of tongue , floor of mouth and lingual gingiva
inferior alveolar nerve
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
nerve to mylohyoid
motor component of the inferior alveolar nerve
branches off before IAN enters mandible
incisive nerve
terminal branch of IAN
supplies canines and incisors of mandibular arch
mental nerve
terminal branch of IAN
exits mandible via mental foreamen
sensory supply to chin , lower lip and buccal gingiva of mandibular anteriors and pre molars
auriculotemporal nerve
branch of posterior trunk of CN V3
sensory supply to elements of ear
shingles
infection of a nerve and the skin around it by varicella zoster virus
what 2 bone make up the hard palate
maxilla and palatine
lingula
bony triangular process next to mandibular foreamen
what divides the tongue into anterior 2/3 and posterior 1/3
terminal sulcus
what nerve supplies general and special sensory to the posterior 2/3 of the tongue
CN IX
glossopharyngeal
what nerve supplies general sensory to the anterior 2/3 of the tongue
CN V
trigeminal
via the lingual nerve
what nerve supplies special sensory to the anterior 2/3 of the tongue
CN VII
facial nerve
via chorda tympani which runs along side the lingual nerve of CN V3
what nerve supplies the tongue muscle
CN XII - hypoglossal supplies all except the palatoglossal muscle which is supplied by CN X (vagus)
