Complicated Cranial Nerves Flashcards
what are the 4 general efferent fibers that the Trigmenial nerve carries
to muscles of mastication, floor of mouth, on muscles of soft palate and one muscle to middle ear
what are the 6 general afferent (sensory) fibers that the trigeminal nerve carries
face, teeth, mouth, nasal cavity, orbit and dura
where is the trigeminal ganglion located
in the trigeminal (Meckel’s) cave under the dura in a depression on the petrous part of the temporal bone
where does V1 travel after leaving the middle cranial fossa
through the wall of the cavernous sinus
what branch does V1 give off before passing through the superior orbital fissure
a recurrent meningeal branch (general afferents from dura of anterior and posterior cranial fossae)
which branch of CN5 suspends the ciliary ganglion
V1- nasociliary nerve
what hitchhikers are carried with V1
visceral efferents to smooth muscle of the eye
what 2 fibers are associated with the lacrimal nerve
general afferents from lacrimal gland and visceral efferents from pterygopalatine ganglion for lacrimal gland
which branch of V1 innervates the frontal sinus
supraorbital nerve -> frontal nerve -> V1
which branch of CN5 carries the hitchhikers from the pterygopalatine ganglion
nasociliary nerve -> short ciliary nerves
which branch of CN5 innervates the sphenoidal sinus
posterior ethmoidal nerves -> nasociliary -> V1
what 4 areas does the anterior ethmoidal nerve innervate
GA from ethmoidal air cells, anterior/superior nasal cavity, tip of nose, and dura of anterior cranial fossa
what 2 areas do the posterior ethmoidal nerves innervate
GA from sphenoidal sinus and dura of anterior cranial fossa
where does V2 suspend the pterygopalatine ganglion
superior part of pterygopalatine fossa suspended by pterygopalatine nerves
how many branches does V2 give off before going into the inferior orbital fissure
3 general afferent branches
how many branches does V2 split into after becoming the infraorbital nerve
2 more branches before exiting onto the face through infraorbital foramen
what 2 branches does the zygomatic nerve have
zygomaticotemporal and zygomaticofacial
where does the zygomatic nerve of V2 enter the orbit
through inferior orbital fissure
where does the posterior alveolar nerve pass after the pterygopalatine fossa
through pterygomaxillary fissure and enters the infraorbital fossa then to posterior superior alveolar foramen
where are the ganglionic branches of V2
they pass from maxillary nerve inferiorly through pterygopalatine ganglion
what are the 5 branches of the infraorbital nerve of V2
anterior superior alveolar nerve, middle superior alveolar nerve, nasal, palpebral, and superior labial branches
where does the infraorbital nerve leave the pterygopalatine fossa through
the inferior orbital fissure
what does the anterior superior alveolar nerve of V2 supply innervation to
joins the superior dental plexus and carries GA from anterior maxillary teeth and labial gingivae
which branch of V2 supplies the maxillary sinus
middle superior alveolar nerve
what are the 3 terminal branches of the infraorbital nerve of V2
nasal, palpebral and superior labial branches
what 3 things do the branches of the pterygopalatine ganglion carry
GA, distribute hitchhiking VE to mucous glands and blood vessels in mucosa of nasal cavity and palate, hitchhiking special afferent (taste) from palate
where do the orbital branches of pterygopalatine ganlion pass through and what do they innervate
pass through inferior orbital fissure- supply orbital wall and sphenoidal/ethmoidal sinuses
whata re the 7 branches of the pterygopalatine ganglion
orbital, palatine, greater palatine nerve, lesser palatine nerve, nasopalatine nerve, posterior superior lateral nasal nerves, and pharyngeal branch
where does V3 suspend the otic ganglion
just inferior to foramen ovale
how many branches does V3 split into in the infratemporal fossa
4 major GA branches and numerous direct muscular branches
what branch of V3 suspends the submandibular ganglion
lingual nerve
what hitchhikers are associated with the auriculotemporal nerve
postganglionic parasympathetic fibers from otic ganglion
does the buccal nerve of V3 pierce the buccinator muscle
no it passes anteriorly but does not pierce or innervate it
what branch of CN7 joins the lingual nerve of V3 and where does it join
chorda tympani, infratemporal fossa
what are 2 hitchhikers that the lingual nerve of V3 carries
pre- and postganglionic parasympathetic fibers to the submandibular and sublingual salivary glands, and special afferent fibers from anterior 2/3 of tongue
what are 2 GE for muscles that the inferior alveolar nerve carries
nerve to mylohyoid and anterior belly of digastric muscles
What are the 4 muscles innervated by the descending branches, that arise in the infratemporal fossa, of V3
masseteric, temporal, medial pterygoid and lateral pterygoid
what 3 muscles does the medial pterygoid muscular branch of V3 go to
GE to medial pterygoid, tensor tympani, and tensor veli palatini muscles
what 5 things occur with a trigeminal nerve lesion
rare- paralysis of muscles of mastication and deviation of jaw to affected side; anesthesia of face; loss of corneal touch reflex; and loss of sneezing reflex
where do the 2 roots (sensory and motor) of CN7 fuse together
they enter the petrous part of temporal bone - through internal auditory meatus- and fuse in the facial canal