ENT anatomy - nerves

Question 1

what happens if there is disruption to the parasympathetic supply of CN VII (facial nerve)?

Answer 1

disruption to lacrimal, nasal cavity, submandibular and sublingual glands

this can cause dry eyes & mucosa (vidian nerve dysfunction) and dry mouth

Question 2

what happens if there is disruption to the special sensation supply of CN VII?

Answer 2

lack of taste in anterior 2/3 of tongue

Question 3

what happens if there is disruption to the somatic motor supply of CN VII?

Answer 3

facial paralysis

Question 4

what are the 3 branches of CNV (trigeminal nerve)?

Answer 4

opthalmic (CN V1)
maxillary (CN V2)
mandibular (CN V3)

Question 5

what is the main sensory supply to the nasopharynx and oropharynx?

Answer 5

CN IX (glossopharyngeal)

Question 6

what is the main sensory supply to the laryngopharynx?

Answer 6

CN X (vagus)

Question 7

describe nerve supply to the tongue

Answer 7

anterior 2/3:
- CN V3 (mandibular) provides general sensory
- CN VII (facial) provides taste

posterior 1/3:
- CN IX (glossopharyngeal) provides general sensory & taste

Question 8

what is the somatic motor supply of CN XII (hypoglossal)?

Answer 8

all muscles of the tongue that end in -glossus apart from palatoglossus

Question 9

what nerve supplies the anteroinferior aspect of the internal tympanic membrane?

Answer 9

CN IX (glossopharyngeal)

Question 10

where does the facial nerve pass through?

Answer 10

internal acoustic meatus

Question 11

what is the nerve damaged if patient experiences dizziness, dry eyes, dry mouth, no taste in ant 2/3 of tongue

Answer 11

CN VII (facial)