Lec 11-3 - Auditory Flashcards Preview

Dental Physiology > Lec 11-3 - Auditory > Flashcards

Flashcards in Lec 11-3 - Auditory Deck (24):
1

Calcification of the ossicles can result in this amount of hearing loss

60 db

2

These protect the cochlea from damage due to very loud noises

Stapedius, tensor tympani

3

This transduces sound signals into neural signal

Cochlea

4

Middle chamber of cochlea has blank

Endolymph

5

Outer 2 chambers of cochlea have blank

Perilymph

6

Basilar membrane contains the blank

Hair cells

7

Where stapes inserts into cochlea

Oval window

8

Base of basilar membrane detects blank

High frequency

9

Basilar membrane is blank and blank

Narrow, stiff

10

Tectorial membrane and hair cells make up the blank

Organ of corti

11

Number of inner hair cells per cochlea

3500

12

We have more blank hair cells than blank

Outer, inner... About 3 times as many

13

Hair cells with role of discriminating sounds... Not bringing messages to the brain... They also get rid of background noise

Outer

14

Damage to hair cells but not eigth nerve fibers.... Blank can be used to activate the right nerve endings

Cochlear implant

15

Exposure to noise leads to these breaking which leads to temporary hearing loss

Tip links

16

Loss of high frequency hearing with age

Presbycusis

17

Presbycusis is due to a loss of blank

Inner+outer hair cells

18

Sounds produced by healthy ears in response to acoustic stimulation

Otoacoustic emissions

19

A given hair cell will respond to sounds of a range of blank

Frequencies

20

Each hair cell and auditory nerve axon has a blank frequency

Characteristic (frequency it is most sensitive to)

21

Louder sound activates blank hair cells

More

22

Transfer of energy is most efficient in this range

1-4 kHz

23

higher order cells are blank selective compared to those in cochlear nucleus

more

24

2 binaural cues

timing, intensity

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