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Neuroscience > Hearing & The Ear > Flashcards

Hearing & The Ear Flashcards

0
Q

What is sound measured in?

A

Hz (cycles per second)

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1
Q

Role of the ear in hearing

A

Sound perception
Freq/ intensity analysis
Location of sound sources

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2
Q

What is the range if human hearing at birth?

A

20Hz - 20kHz

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3
Q

Proper name for eardrum?

A

Tympanic membrane

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4
Q

What in the meatus secretes cerumen (earwax)?

A

Ceruminous glands

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5
Q

Which part of the ear is related to hearing?

A

The cochlea

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6
Q

Name the 3 bones of the middle ear

A

Malleus
Incus
Stapes

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7
Q

What is otosclerosis?

A

Calcification of joints
Reduces hearing acuity
Particularly where the foot plate of the stapes inserts into the oval window

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8
Q

What is otitis media?

A

Glue ear
Ear infection
Fluid in middle ear

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9
Q

What can be insert in the tympanic membrane in other to drain mucus in recurrent ear infections?

A

A grommet

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10
Q

Name the 3 tubes of the cochlea?

A

Scala tympani, vestibuli & media

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11
Q

What is inside the scala vestibuli & tympani?

A

NaCl

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12
Q

What is inside the scala media?

A

KCl

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13
Q

What NT is released in hair cells when they are depolarised?

A

Glutamate

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14
Q

What is the role of the 1 row of inner hair cells?

A

Pitch determination

Send frequency info to CNS

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15
Q

What is the role of the 3 rows of outer hair cells?

A

Amplification

Increase sensitivity

16
Q

What are cochlear microphonics/ auto acoustic emissions?

A

When eat is damaged
Hair cells may oscillate in absence of sound
Basilar mem vibrates= loudspeaker that emits sound!

17
Q

What is tonotopy?

A

Matching pitch to position

18
Q

What membrane is found between the scala tympani & media?

A

The basilar membrane

19
Q

In what patients can cochlear implants restore hearing?

A

Loss of hair cells but with ‼️

Neuroscience (20 decks)

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