Facial palsy Flashcards
where does the facial nerve arise in the brainstem
pons -motor and sensory
where does the facial nerve exit the brainstem
pontomedullary junction
where does the facial nerve exit through the skull
posterior fossa
where does the facial nerve go once out the posterior fossa 3
through the middle ear -> emerges through the stylomastoid foramen -> passes into the parotid
state the three intracranaial branches of the faicla nerve
greater superfical petrosal nerve
branch to stapedius
chorda tympani
function of greater superfical petrosal nerve (intercraial branch of facial nerve)
lacrimation
presentation if lesion of stapedius branch of the facial nerve
hyperacusis
function of chorda tympani (intercraial branch of facial nerve)
supply taster to anterior 2/3 of tounge
function of all extracrainial branches of facial nerve 1
motor
state the extracranial branches of facial nerve 7
posterior auricular nerve
branch to posteiror belly of digastric muscle and stylohyoid msucle
5 major branches within parotid
-temporal
-zygomatic
-buccal
-arginal madnibular
-cerivcal
how can causes of facial palsy be split 4
intracranial
intratemproal
infratemporal
others
intracranial causes of facial palsy 5
brainstem tumour
stroke
polio
MS
cerebellopontine angle lesions (acoustic neuroma, meningitis)
intratemporal causes of facial palsy 3
otitis media
ramsay hunt syndrome
cholesteatoma
defnie ramsay hunt syndrome
Ramsay Hunt syndrome (herpes zoster oticus) occurs when a shingles outbreak affects the facial nerve near one of your ears. In addition to the painful shingles rash, Ramsay Hunt syndrome can cause facial paralysis and hearing loss in the affected ear
infratemporal causes of facial palsy 2
parotid tumour
trauma leading to complete palsy
