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Spot test 2 > Auditory pathway lecture > Flashcards

Auditory pathway lecture Flashcards

1
Q

Where is the auditory pathway located?

A

The petrous part of the temporal bone

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2
Q

Which nerves pass through the internal acoustic meatus?

A

vestibular cochlea and facial nerve

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3
Q

What are the three bones of the ossicles?

A

Incus
Malleus
Stapes

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4
Q

What is the function of the auditory tube?

A

Allows air to pass into the middle ear to maintain equilibrium - equalises pressure either side of the tympanic membrane

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5
Q

Where is the inner ear located?

A

In the pectoris part of the temporal bone

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6
Q

Which window do the ossicles hit?

A

The oval window

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7
Q

What are the cavities in the petrous part of temporal bone?

A

Vestibule
SSC
Cochlea

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8
Q

What is the fluid inside the cochlea?

A

Perilymph

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9
Q

What is the constituency of perilymph?

A

High in sodium
Low in potassium
(creates electrical potential)

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10
Q

What is the cochlear duct?

A

Membranous sack which runs through the cochlea

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11
Q

What type of fluid does the cochlear duct contain?

A

Endolymph

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12
Q

What two chambers does the cochlear duct separate the cochlea into?

A

The scala vestibuli

The scala tympani

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13
Q

What is the apex of the cochlea called?

A

Helicotrema

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14
Q

What forms the roof of the cochlear duct?

A

The Vestibular membrane

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15
Q

What forms the floor of the cochlear duct?

A

The basement membrane

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16
Q

What is the auditory receptor?

A

Spiral organ of corti - on the basilar membrane

17
Q

How is the spiral organ stimulated?

A

by the deformation of the cochlear duct - due to the perilymph in the surround st and sv

18
Q

Where does the vestibular cochlear nerve enter the brainstem?

A

Cerebellar pontine angle

19
Q

Breakdown of auditory pathway?

A 
Cochlea
Spiral ganglion
Cochlea nuclei
Superior olivary nucleus
Inferior calculus
Medial geniculate nucleus
Herschel's gyrus
20
Q

Where is the superior olivary nucleus?

A

pons

21
Q

Where is the inferior calliculus?

A

Midbrain

22
Q

Where is the medial geniculate nucleus?

A

thalamus

23
Q

Where is heschl’s Gyrus?

A

Temporal lobe - superior temporal gyrus

24
Q

What tract is the nerve running in between superior olivary nucleus and inferior calliculus?

A

Lateral lemniscus

25
Q

What tract is the nerve running in between inferior calliculus and medial geniculate nucleus?

A

The inferior brachium

26
Q

Which end of basement membrane receives high pitch?

A

The proximal end

27
Q

Which end of basement membrane receive low pitch?

A

The apex

28
Q

What is the function of the secondary auditory areas?

A

Specialised linguistic function

29
Q

What is broca’s area?

A

Understanding of words you are speaking - fluent speech

30
Q

What is Werner’s area?

A

Understanding of spoken word

Spot test 2 (14 decks)

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