cranial nerves Flashcards
Name the CNs in order
olfactory optic oculomotor trochlea trigeminal abducens facial vestibulocochlear glossopharyngeal vagus accessory hypoglossal
which bones make up orbit
frontal, zygomatic, maxilla, nasal, sphenoid, ethmoid, lacrimal
what goes through the optic canal
optic nerve
opthalmic artery
what goes through the superior orbital fissure
CN 3 CN 4 CN 5 CN 6 Superior opthalmic vein Inferior ophthalmic vein
extraocular muscles
superior rectus inferior rectus medial rectus lateral rectus superior oblique inferior oblique
what movement does the superior oblique cause
intorsion, depression, abduction
what movement does inferior oblique cause
extorsion, elevation, abduction
which intraocular muscles does oculomotor innervate
sr, mr, ir, io
which intraocular muscle does trochlea innervate
so
which intraocular muscle does abducent innervate
lr
inf rectus eye movement
depress, adduct
sup rectus eye movement
elevate, adducts
medial rec eye movement
adduction
lat rectus eye movement
abduction
oculomotor palsy
eye in down and out position
eye slightly closes
dilated pupil
trochlear palsy
up and in eye position
abducens palsy
effected eye cannot abduct
appears normal when looking forward
horners syndrome
pupil constricts
ptosis
parts of trigeminal nerve
v1 opthalmic
v2 maxillary
v3 mandibular
v1 opthalmic innervation
sensory to eye
parasympathetic to lacrimal gland
v2 maxillary innervation
sensory to superior dentition, gums, palate, maxillary air sinuses
v3 mandicular innervation
motor to muscles of mastication
inferior alveolar - sensory to lower dentition
lingual - sensory to ant 2/3 of tongue
branches of vs mandibular nerve
inferior alveolar
lingual
what trigeminal branch passes through the orbital fissure
opthalmic
what trigeminal branch passes through the foramen rotundum
maxillary
what trigeminal branch passes through the foramen ovale
mandibular
which is the only trigeminal branch with a motor root
mandibular
paralysis of trigeminal
paralysed muscles of mastication
loss of face sensation
loss of corneal reflex
abducens innervation
Motor to the lateral rectus muscle of the eye
which fissure does abducens exit the skull through
superior orbital
which fissure does facial nerve exit the skull through
internal acoustic meatus
facial nerve motor root branches
motor root
chorda tympani
great petrosal nerve
facial nerve divisions
temporal zygomatic buccal marginal mandibular cervical Two Zombies Bit My Cat
facial nerve path
Motor neurones originate from primary motor cortex and travel down through the internal capsule and down the corticobulbar tract. Branch of to the facial nucleus in the pons
why is the forehead innervated by both sides
upper facial nucleus is innervated bilaterally by upper motor neurons
why is the lower face not innervated by both sides of brain
lower motor neurons only supplied by opposite side of brain
bells palsy
facial muscle paralysis. Lower half of face paralyzed as well as one side of the forehead
droopy eyelid, dry eye or excessive tears. Drooping corner of mouth, impaired taste, dry mouth.
Contralateral Stroke
Affects corticobulbar tract before bilateral innervation
forehead spearing as it is supplied also by other side of brain
vestibulocochlear innervation
Vestibular nerve motion and equilibrium
Cochlear nerve hearing
which foramen does vestibulocochlear exit skulls through
internal acoustic meatus
which foramen does the glossopharyngeal leave skull through
jugular foramen
glossopharyngeal innervation
sensory to pharyngeal plexus, oropharynx
special to post 1/3 of tongue
parasympathetic to
which foramen does vagus leave skull through
jugular
vagus innervation
sensory to lower pharynx and larynx,and aortic body
motor to muscles of palate, pharynx, and larynx, palatoglossus
parasympathetic to heart, trachea, bronchial tree, GI tract to L colic flexure
vagus branches in neck
Auricular nerve Pharyngeal nerves Superior laryngeal nerve Right recurrent laryngeal nerve Left recurrent laryngeal nerve
spinal accessory foramen
jugular foramen
spinal accessory innervation
Motor to the sternocleidomastoid and trapezius
hypoglossal foramen
hypoglossal canal
hypoglossal innervation
Motor to all intrinsic and extrinsic muscles of the tongue excluding palatoglossus
sympathetic supply to head
superior, middle, and inferior ganglia
