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Pain > Auditory > Flashcards

Auditory Flashcards

1
Q

what is the pina?

A

cartilaginous part of outer ear

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2
Q

What are the two parts of the outer ear?

A

Pina

External auditory meatus

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3
Q

what are the bones of the middle ear? muscles?

A

bones-> malleus, incus, stapes (oval footplate)

muscles->tensor tympania, stapedius

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4
Q

What is the eustation tube do?

A

connects the middle ear to the outside world

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5
Q

what does middle ear do?

A
  1. moves fluid in inner ear
  2. modulates sound pressure
  3. Acoustic reflex (stapedius)
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6
Q

what does tensor tympani do?

A

contraction = tighter eardrum (CN V)_

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7
Q

What does stapedius do?

A

dampens sound by stiffening stapes ( CN VII)

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8
Q

Inner ear main structure

A

bony and membranous cochlea

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9
Q

How many times does the cochlea turn?

A

2.5 turns

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10
Q

Difference between perilymph and endolymph

A

endolymph is more viscous,

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11
Q

scala vestibule

A

fluid flowing in

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12
Q

scala tympanie

A

fluid flowing out

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13
Q

Scala media

A

sound production (Surrounded by membrane and full of endolymph)

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14
Q

What is the name of the hearing part of the inner ear?

A

organ of corti

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15
Q

what produces endolymph

A

stria vascularis

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16
Q

How does sound transduction work?

A

1 row of inner hair cells - 95% of nerve
3 rows of outer hair - frequency resolution, protect from loud noises, can change height

They dance on the tectorial membrane

17
Q

Aminoglycoside antibiotics can destroy which types of cells?

A

Outer hair cells

18
Q

Sound pathway

A

CN VIII->Superior Olive (bilateral)>Cochlear nucleus>inf. colliculus>med. genticulate body->heschyls gyri

19
Q

olivocochlear bundle?

A

goes from superior olive –> outer hair cells so that they know how to best modulate sound

20
Q

Where are the medial and lateral geniculate nuclei?

A

Far posterior of Thalamus in the midbrain

21
Q

How do you get from thalamus to Auditory cortex?

A

bypass the internal capsule

Pain (8 decks)

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