Cranial nerves Flashcards
(30 cards)
Hole CN1 goes through
cribriform plate
function of CN 2
vision and pupillary light reflex
what does optic nerve exit through?
optic foramen
motor innervation of occulomotor nerve
superior, inferior and medial rectus
inferior oblique muscle
levator palperbrae superioris muscles
PS innervation of occulomotor nerve
sphincter pupillae and ciliary muscle of the eyeball
trochlear motor innervation
superior oblique muscle
what exits through the superior orbital fissure?
CN3, occulomotor
CN4, trochlear
and V1, opthalmic branch of trigeminal
CN 6 - abducens
trigeminal sensory innervation
via opthalmic V1 branch - general sensation
motor CN5 innervation
trigeminal maxillary and mandibular muscles of mastication: tensor tympani, temporal is and masseter
Where do V2 and V3 exit from?
2 - trigeminal maxillary
3- trigeminal mandibular
where does CN 6 exit from and what does it innervate?
of the lateral rectus
exits from superior orbital fissure
facial sensory innervation
anterior 2/3 or tongue
CN 7 motor innervation
muscles of facial expression - stapedius muslce.
facial movement and tension on middle ear bones
facial PS innervation
salivary and lacrimal glands
where does CN 7 exit from?
internal auditory meatus
vestibulocochlear nerve
CN 8 sensory from vestibular apparatus - cochlea.
exits from internal auditory meatus
CN 9 sensory supply
pharynx, posterior 1/3 of tongue, eustachian tube, middle ear
motor glossopharyngeal nreve supply
stylopharyngeus muscle
PS CN 9
parotid salivary gland
where does glossopharyngeal exit from?
jugular foramen
Vaugs sensory supply
pharynx, larynx, tachea, oesophagus, external ear
(thoracic and abdominal viscera e.g. aortic arch)
so general sensation (and visceral sensation)
motor CN 10 supply
soft palate, larynx, pharynx, upper oesophagus.
so speech and swallowing
Vagus PS innervation
thoracic and abdominal viscera. innervation of smooth muscle in reps, cardiac and GI tract.
where does vestibulocochlear exit from?
internal auditory meatus
