Facial nerve palsy -UW Flashcards
55M
Headache - Throbbing+ Wrose at morning & cough
Hx of HTN - take lisinopril
facial weakness
Dropping of lower left eylid
flattening of the left nasolabial fold
MRI - well circumscribed homogenous enhancing mass in the posterior fossa - compress left facial nerve root
Additional findings?
Dx ??
facial nerve palsy
findings - Inc sensitivity to sound
MRI of facial nerve palsy ?
why homogenous mass in posterior fossa ?
meningioma
facial nerve compression
why headache in facial nerve palsy ?
space occupying intracranial lesions - worse at morning
valsalva - bearing down & couging = as Intracranial pressure ++++
facial nerve exists the brainstem where ?
pontomedullary junction
facial nerve enter in brainstem ?
1.internal auditory meatus
2.facial canal in temporal bone
branches supply of facial nerve >
Stapedius muscle - reduce volume by dampening ossicle movment in middle ear
salivary gland
lacrimal gland
tongue - ant 2/3 by chordae tympani nerve
by which structure facial nerve exit skull ?
stylomastoid foramen
then parotid gland and muscles of facial expression
paralysis of the stapedius muscle in facial nerve palsy result ?
inc sensitivity to sound - hyperacusis
facial nerve palsy other features <
can be explain by branch supply of facial nerve
dec lacrimation - salivation loss of taste in the ant 2/3 of tongue
facial paralysis features in facial nerve palsy ?
loss of forehead and brow movements
inability to close eye
dropping of eyelids
loss of nasolabial folds
dropping of lower lip
hyperacusis indicate facial nerve palsy - origin where >
close to the origin from the brainstem
oculomotor nerve plasy features ?
down and out eye deviation
ptosis - due to levator palpebrae superioris paralysis
fixed dilated pupil - parasympathetic fiber injury
hoarness of voice in which nerve palsy ?
vagus
due to laryngeal muscles
