Facial Nerve (7th) Flashcards
1
Q
What does it do?
A
Sensory: anterior 2/3 tongue
Motor: expression and stapedius
2
Q
Causes of 7th nerve palsy: Unilateral, LMN
A
Bell’s palsy
Ramsay Hunt
Stroke/demyelination of 7th nerve nucleus in pons
CPA lesion
infection: Lyme disease, TB
Infiltration: sarcoid lymphoma
Vasculitis
3
Q
Pathway of the facial nerve
A
Pons (wraps around 6)
CPA (with 8, then 5+6)
Internal auditory meatus (with 8)
Facial Canal (chordi tympani and nerve to stapedius have branch off)
Stylomastoid foramen
Branches in temporal zygomatic, buccal, mandibular, cervical
4
Q
Differentials for unilateral facial nerve palsy and how you differentiate each one?
A
5
Q
Causes of a bilateral nerve palsy
A
GBS
MG
Bilateral bells
Sarcoid
Lyme disease
