Cranial Nerve VII facial nerve

Question 1

cranial nerve 7 facial nerve functions?

Answer 1

1. branchial motor input to muscles of facial expression in scalp, eyebrow, eyelids & cheek
2. sensory information of taste
3. visceral motor - parasympathetic input to stimulate secretion i.e nasal, lacrimal glands

Question 2

both the branchial motor & visceral motor project?

Answer 2

from the brainstem to the ipsilateral side

Question 3

the motor branch travels into__?

Answer 3

internal auditory meatus through geniculate ganglion

Question 4

cranial nerve 7 & 8 can be damaged together because?

Answer 4

CN 8 also passes thru the internal auditory meatus so can be damages together at this site

Question 5

CNVII motor branch issues can result in

Answer 5

paralysis of face and hearing defects

Question 6

CN VII motor branch continues thru ____ and emerges from ____?

Answer 6

continues through facial canal and emerges from stylomastoid foramen

Question 7

in terms of a CNVII lesion what is more worrisome?

Answer 7

if less of the face is affected which is due to supranuclear lesion ( upper motor neuron)

Question 8

upper face sparing indicates a supranucelar lesion because

Answer 8

upper motor neurons innervating lower face project contra laterally

Question 9

see slide 15 in notes to review more of this lesion info