CH: 16 Ears

Question 1

what does the external ear do

Answer 1

funnels sound waves to auditory canal

Question 2

what is the tympanic membrane

Answer 2

eardrum
*separates external and middle
*translucent, pearly-gray
*reflect light and vibrate from sound waves

Question 3

what is the middle ear filled with

Answer 3

AIR

Question 4

what makes up the middle ear

Answer 4

malleus
incus and stapes
eustachian tube

Question 5

malleus

Answer 5

reduces amplitude

Question 6

incus and stapes

Answer 6

transmits sound waves

Question 7

eustachian tube

Answer 7

equalizes air pressure

Question 8

what is the inner ear

Answer 8

contains bony labyrinth
*for equilibrium and hearing

Question 9

what is the cochlea

Answer 9

contains central hearing apparatus

Question 10

conductive hearing loss

Answer 10

dysfunction of external or middle ear

Question 11

sensorineural hearing loss

Answer 11

pathology of inner ear, CN VII, or auditory areas of cerebral cortex

Question 12

presbycusis

Answer 12

gradual nerve degeneration

Question 13

whisper test

Answer 13

stand 1-2 ft behind
occlude one ear
whisper 2 syllable word

Question 14

weber test

Answer 14

strike tuning fork and place on top of head
*equally heard in both ears

Question 15

rinne test

Answer 15

strike tuning fork
place behind mastoid process until cant be heard (note time)
then put fork by meatus and see how much longer its heard

Question 16

what is a normal rinnes test result

Answer 16

AC>BC

Question 17

where does sound lateralize in conductive hearing loss for weber test

Answer 17

poorer ear

Question 18

where does sound lateralize in sensorineural loss in weber test

Answer 18

better ear

Question 19

romberg test

Answer 19

stand feet together and close
*normal is able to stand straight with mini swaying