ENT anatomy summary

Question 1

where is the ethmoid bone found in relation to the nose

Answer 1

behind it

Question 2

where does the sphenoid sinus drain into

Answer 2

sphenoethmoidal recess

Question 3

where do the posterior ethmoidal air cells drain into

Answer 3

superior meatus

Question 4

which 2 structures drain into middle meatus

Answer 4

semilunal hiatus

ethmoid bull

Question 5

what does semilunal hiatus have openings for

Answer 5

• frontal and maxillary sinuses

- anterior ethmoidal air cells

Question 6

what does the ethmoidal bulla have an opening for

Answer 6

middle ethmoidal air cells

Question 7

what drains into the anterior meatus

Answer 7

nasoclarimal duct

Question 8

is the concha above or below its associated meatus

Answer 8

above

Question 9

which cartilage is the larynx made mostly of? which is made of different cartilage?

Answer 9

most hyaline

epiglottis = elastic

Question 10

what is another name for the scala media

Answer 10

cochlear duct

Question 11

what is the cochlear duct a component of

Answer 11

membranous labyrinth

Question 12

when are the scala vestibule and tympani continuous with each other? what is this called

Answer 12

helicotrema

Question 13

what is the modiolus and what does it contain

Answer 13

the boney core which the cochlea encircles

contains canals for conveying blood vessels and distributing branches of the cochlear nerve

Question 14

where is the organ of corti located

Answer 14

cochlear duct / scala media

Question 15

which is the most inwardly depressed part of the tympnaic membrane?

Answer 15

umbo

Question 16

which way does the cone of light normally face

Answer 16

anterioinferiorly

Question 17

CN responsible for sensory tymani

Answer 17

CN V3

Question 18

CN responsable for stapedius

Answer 18

CN VII

Question 19

which 5 things does the glossopharyngeal nerve innervate (CN IX)

Answer 19

middle ear cavity 
ET
nasopharynx
oropharynx
palatine tonsil

Question 20

back of ear

Answer 20

C2,3 spinal nerves via lesser occipital nerve

Question 21

front of external ear

Answer 21

C2,3 spinal nerves via greater auricular nerve

Question 22

dots on external ear –> middle ear

Answer 22

CN VII facial nerve

Question 23

pinna> superior part of EAM

Answer 23

CN V3 (via auriculotemporal nerve ) 
superior parts of EAM and most of tympanic membrane

Question 24

inferior part of EAM and tympanic membrane

Answer 24

CN X

Question 25

anterior 2/3rds of tongue

Answer 25

facial nerve

Question 26

somatic motor facial nerve goes to which 4 places

Answer 26

1. muscles of facial expression (temporal, zygomatic, buccal, mandibular + cervical) 2. stapedius 3. posterior belly of diagnostic 4. stylohyoid

Question 27

visceral motor / parasympathetic facial nerve goes to where

Answer 27

lacrimal gland, submandibular and sublingual glands, minor glands of nasal cavity and palate

Question 28

which nerve associated with chords tympani

Answer 28

lingual nerve

Question 29

which pharynx muscle causes opening

Answer 29

lateral pyterygoid

Question 30

which pharynx muscle is associated with the shoudler

Answer 30

omrohyoid

Question 31

name the 4 muscles of the tongue

Answer 31

palatoglossus styloglossus hyoglossus genioglossus

Question 32

what are 3/4 tongue muscles innervated by

Answer 32

CN XII

Question 33

which tongue muscle isn't innervated by CN XII? what is it innervated by? how do you remember this?

Answer 33

palatoglossus - CN X | ' have to plait my hair for my ex '

Question 34

what does tensor veil palatini do

Answer 34

tenses palatine aponeurosis

Question 35

what does levator veil palatini do

Answer 35

lifts palatine aponeurosis

Question 36

what do the 2 palatine muscles do together

Answer 36

close the ET

Question 37

what are all (apart from one) of the soft palate muscles innervated by

Answer 37

CN X

Question 38

which soft palate muscles isn't innervated by CN X and what is it innervated by?

Answer 38

tensor veli palatini | V3

Question 39

which muscle shortens uvula

Answer 39

musculus uvulae

Question 40

which muscle elevates pharynx and depresses soft palate

Answer 40

palatopharyngeus

Question 41

where does anterior ethmoid artery course

Answer 41

enters sphenoid bone | courses down to the tip of the nose

Question 42

what does the modified Romberg test test for?

Answer 42

likelihood of falling input - vestibular output - vestibulopinal

Question 43

tastebuds have lifespan of

Answer 43

10 days

Question 44

what may hyposmia be an early sign of

Answer 44

parkinsons