Ears

Question 1

auricle or pinna

Answer 1

moveable cartilage

Question 2

auditory canal is how long

Answer 2

3 cm in adults

Question 3

tympanic membrane

Answer 3

separates external and middle ear

Question 4

middle ear functions

Answer 4

conducts sound vibrations from outer ear, reduces amplitude of sounds, equalization of air pressure

Question 5

auditory ossicles

Answer 5

malleus, incus, stapes

Question 6

eustachian tube

Answer 6

allows passage of air, opens with yawning and swallowing

Question 7

bony labyrinth

Answer 7

sensory organs for equilibrium and hearing

Question 8

pathways of hearing

Answer 8

air conduction (AC) and bone conduction (BC)

Question 9

Conductive hearing loss and causes

Answer 9

mechanical dysfunction of sound wave transmission, otitis media (fluid in middle ear), otosclerosis, impacted cerumen or foreign bodies

Question 10

sensorineural or perceptive hearing loss and causes

Answer 10

pathology of organ of corti (inner ear), CN VIII, or temporal lobe. from drugs, loud noise, ear infections, or smoking

Question 11

prebycusis

Answer 11

gradual nerve degeneration that occurs with aging (common cause)

Question 12

boney labyrinth function

Answer 12

determines body’s position in space, verticality and depth

Question 13

tympanic membrane should have light reflections

Answer 13

5 in right ear, 7 in left ear

Question 14

weber test

Answer 14

use of a tuning fork, placed on skull should be heard in each ear

Question 15

conductive loss during weber test

Answer 15

sound will go to affected ear, normal ear hears background noise

Question 16

rinne test

Answer 16

tuning fork placed on mastoid process until not heard (shorter), then held in front of ear (longer)

Question 17

conductive loss during rinne test

Answer 17

BC is heard longer than AC