Cranial Nerves Flashcards
where does the parasympathetic supply associated with the occulomotor nerve arise?
edinger westphal nucleus
where does the occulomotor nerve arise?
occulomotor nucleus
where does the occulomotor nerve exit the brain?
stylomastoid foramen
what is innervated by the superior division?
Levator Palpebrae Superioris
Superior Rectus muscle
what does the inferior division innervate?
inferior oblique
inferior rectus
medial rectus
what is the PS ganglion that the occulomotor nerve is associated with?
ciliary ganglion
by what route does the ciliary ganglion connect with the spinchter pupillae?
short ciliary nerve
what are the anatomical landmarks associated with CN III?
cavernous sinus
uncus
teritorial notch
what area of the brain does the occulomotor nerve arise?
midbrain
what 3 areas of the brain does the sensory branch of the trigeminal nerve arise from?
midbrain
pons
medulla
what are the 3 branches of the trigeminal nerve?
Vi - opthalmic
Vii - maxillary
Viii - mandibular
what route does the Vi exit the skull?
superior orbital fissure
what route does the Vii exit the skull?
foramen rotundum
what route does Viii exit the skull?
foramen ovale
what are the 3 branches of Vi?
frontal
nasocilary
lacrimal
what does Vi supply?
cornea conjunctiva and skin of upper eyelid dorsum of nose frontal and ethmoid sinus forehead and scalp
how many branches of Vii are there?
14
what does Vii supply?
lower eyelid and conjunctiva cheeks maxillary sinus palatine superior upper teeth lateral nose and nasal cavity upper lip
what are the 4 branches of Viii? (sensory)
Buccal
Auriculotemporal
lingual
inferior alveolar
what does Viii supply?
chin lower teeth anterior 2/3 tongue (general) lower lip external ear mucous membranes of oral cavity
what motor supply does Viii do?
muscles of masstication
tensor tympani
anterior digastric
levator veli palatini
explain parasympathetics involving the trigeminal nerve
does not have any, but some HITCH HIKE on the nerve
pterygopalatine ganglion -> V2 -> V1 -> lacrimal gland
-> nasal mucosa
submandibular ganglion -> V3 -> submandibular and sublingual glands
what is the difference between buccal branch and buccal nerve?
buccal nerve arises from Viii
buccal branch arises from VII
after which structure do the sensory and motor branches of the CN VII meet to form the facial nerve?
internal acoustic meatus
what ganglion is formed after the facial nerve is formed?
geniculate ganglion
what is the parasympathetics of the facial nerve?
greater petrosal nerve supplies glands
chorda tympani also carries some to submandibular ganglion and then they hitch hike along CN V
what does the nerve to stapedius supply?
stapedius
what does the chorda tympani do?
provides special sensory innervation to the anterior 2/3 of tongue
what structure does the facial nerve exit after the chorda tympani branches off?
the stylomastoid foramen
what 3 nerves are given off before the facial nerve enters the parotid but after it exits the stylomastoid foramen
posterior auricular
nerve to (post) digastric
nerve to stylohyoid
what are the terminal branches of the facial nerve?
Temporal branch Zygomatic branch Buccal branch Marginal mandibular branch Cervical branch
What does the posterior auricular nerve supply?
the muscles of the external ear
what does the temporal branch supply?
frontalis, orbicularis occuli, corrugator supercilli
what does the zygomatic branch supply?
orbicularis occuli
what does the buccal branch supply?
buccinator, orbicularis oris, zygomaticus
what does the marginal mandibular branch supply?
mentalis
what does the cervical branch supply?
platysma
after the internal acoustic meatus, what space does the facial nerve lie in?
facial canal
