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Audiology > Ear Anatomy > Flashcards

Ear Anatomy Flashcards

1
Q

What direction should you pull the pinna to straighten the ear canal of an adult?

A

Up and back

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2
Q

What direction should you pull the pinna to straighten the ear canal of a child/infant?

A

Down and back

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3
Q

What bone makes up the inner 2/3 of the external ear canal?

A

Temporal Bone

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4
Q

Which two glands are found in the outer 1/3 of the external ear canal?

A

Ceruminous and Sebacious Glands

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5
Q

By what intensity dB does the external ear canal increase sound intensity?

A

15 dB

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6
Q

The external ear canal increases the sound intensity of what range of frequencies?

A

2000-4000 Hz

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7
Q

By what intensity dB do the middle ear bones increase sound pressure?

A

25 dB

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8
Q

Into which window does the stapes bone insert?

A

The oval window

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9
Q

By which cranial nerve is the stapedius muscle innervated?

A

Facial (VII)

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10
Q

By which cranial nerve is the tensor tympani muscle innervated?

A

Trigeminal (V)

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11
Q

What condition may inhibit stapedius muscle contraction?

A

Bell’s Palsy

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12
Q

To what system to the semicircular canals belong?

A

Vestibular System

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13
Q

Which system, also known as the inner ear, contains the cochlea?

A

Auditory System

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14
Q

What is the name of the top chamber of the cochlea which contains parilymph?

A

Scala Vestibuli

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15
Q

What is the name of the middle chamber of the cochlea which contains endolymph?

A

Scala Media

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16
Q

What is the name of the bottom chamber of the cochlea which contains perilymph?

A

Scala Tympani

17
Q

What is the name of the opening at the apex of the cochlea which connects the scala vestibuli from scala tympani?

A

Helicotrema

18
Q

What is the name of the membrane that separates the scala vestibuli from the scala media?

A

Reissner’s Membrane

19
Q

What is the name of the membrane that separates the scala media from the scala tympani?

A

Basilar Membrane

20
Q

Where does the Organ of Corti reside?

A

On the basilar membrane in the cochlea.

21
Q

What are the steps of the ascending central auditory pathway (aka Chuck SLIMT)?

A

Cochlear Nucleus, Superior Olive, Lateral Lemniscus, Inferior Colliculus, Medial Geniculate Body, Temporal Lobe

Audiology (2 decks)

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