Cranial Nerves Flashcards
(37 cards)
Where does cranial nerve 1 enter the skull?
olfactory nerve - cribriform plate.
Where does cranial nerve 6 exit the skull?
Abducens exits superior orbital fissure
Where does vagus exit the skull?
CN X - Jugular foramen
Where does the optic nerve exit the skull?
CN II - Optic canal
Where does cranial nerve 3 exit the skull?
Oculomotor - Superior orbital fissure
Where does the trochlear exit the skull?
CN IV - Superior orbital fissure
What are the branches of trigeminal nerve called and whereto they exit the skull?
V1 - Ophthalmic - Superior Orbital Fissure
V2 - Maxillary - Foramen Rotundum
V3 - Mandibular - Foramen Ovale (sensory + motor)
Where does cranial nerve 9 exit the skull?
Glossopharyngeal - Jugular foramen
Where does cranial nerve 8 exit the skull?
Vestibulocochlear - Internal auditory meatus
Where does cranial nerve 12 exit the skull?
Hypoglossal - Hypoglossal canal
Where does facial nerve exit the skull?
CN VII - Internal Auditory Meatus
Where does cranial nerve 11 exit the skull?
Accessory Spinal - Jugular Foramen
what bone do the olfactory nerves pass through specifically
cribriform plate of ethmoid bone
where do the olfactory nerves synapse
the olfactory bulb
what is the name given to a loss of smell
anosmia
why would you get a loss of pupillary construction if the optic never was damaged
because the light reflex requires light to reach the retina in order to send the impulses to the pretectal nucleus
between which 2 cranial nerves do we switch from travelling round the cavernous sinus to just continuing in the posterior cranial fossa
cn 6 and 7
what 2 muscles are innervated by the autonomic (paras) division of the oculomotor nerve
sphincter pupillae and ciliary muscle for accommodation of the lens
why would ypu get ptosis with damage to the oculomotor nerve
because it innervates levator palpabrae superioris, so they struggle to keep their eye open
an aneurysm in which 3 arteries can cause looking down and out of the eye?
so oculomotor nerve is affected. it comes out of the interprduncular fossa. 3 arteries around there are: posterior communicating artery, superior cerebellar and posterior cerebral.
what name is given to the dural cavity that contains the trigeminal ganglion
the trigeminal cave
what direction can’t your eye look in if the trochlear nerve is damaged
supplies superior obliques so can’t look down and in
which root (sensory or motor) is larger for the trigeminal nerve
sensory
what muscles does the trigeminal nerve innervate
muscles of mastication and levator and tensor too that affect the palate (?)
