ENT Ear

Question 1

what is the pterion?

Answer 1

H shapes suture between frontal, parietal, temporal and sphenoid (thinnest part of skull)

Question 2

what nerves does the temporal bone contain?

Answer 2

CN7 and CN8

Question 3

what are the two parts of the temporal bone?

Answer 3

petrous and squamous

Question 4

what does the IAM contain?

Answer 4

CN7

CN8

labyrinthine artery and vein

Question 5

what glands produce earwax?

Answer 5

ceruminous glands

Question 6

in a child, what way is the ear pulled for otoscopy?

Answer 6

posteroinferiorly

Question 7

in an adult, what way is the ear pulled for otoscopy?

Answer 7

posterosuperiorly

Question 8

tympanic membrane - external and internal surface nerve supply?

Answer 8

external - CN V3

internal - CN 9

Question 9

what does CN 9 supply sensory innervation to?

Answer 9

middle ear

eustachian tube

nasopharynx

oropharynx

tonsils

Question 10

what fits into the oval window?

Answer 10

base of stapes

Question 11

what joints do auditory ossicles articulate via?

Answer 11

synovial joints

Question 12

what bone does the tensor tympani muscle come off?

Answer 12

malleus

Question 13

nerve supply of tensor tympani muscle?

Answer 13

CNV3

Question 14

what does the eustachian tube connect?

Answer 14

anterior wall of middle ear to nasopharynx

Question 15

laryngopharynx nerve supply?

Answer 15

CN10

Question 16

function of tensor tympani?

Answer 16

dampens noise produced by chewing

Question 17

supply of stapedius muscle?

Answer 17

CN7

Question 18

function of stapedius?

Answer 18

reduces stapes movement to protect the internal ear from excessive noise

Question 19

what are the two parts of CN8?

Answer 19

cochlear and vestibular nerves

Question 20

where is the otic capsule?

Answer 20

temporal bone

Question 21

what movement change do semicircular ducts detect?

Answer 21

angular movement change

Question 22

what movement change do the utricle and saccule detect?

Answer 22

linear (combined)

utricle - horizontal

saccule - vertical

Question 23

what are clusters of hair cells called in the inner ear?

Answer 23

maculae

Question 24

Answer 24

Question 25

Answer 25

Question 26

Answer 26

Question 27

Answer 27

external

middle

inner

Question 28

Answer 28

1. incus
2. malleus
3. tympanic membrane
4. round window
5. eustachian tube
6. cochlea
7. CN8
8. semicurcular ducts, ampullae, utricle and saccule
9. stapes in oval window

Question 29

Answer 29

purple - C2,3 spinal nerves

red - C2,3 spinal nerves

yellow - CN7

green - CNV3

blue - CNX

Question 30

Answer 30

Question 31

Answer 31