Internal ear (dave's notes) Flashcards

1
Q

Where is the internal ear found? What does it consist of?

A

Buried in the petrous bone, consisting of the osseous labyrinth containing the membranous labyrinth filled with endolymph.

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2
Q

What fills the space between the osseous and membranous labyrinth?

A

Perilymph

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3
Q

Name the parts of the osseous labyrinth from front to back

A

Cochlear canal
Vestibule
Semicircular canals

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4
Q

What two labyrinths make up the inner ear?

A

The osseous and membranous labyrinths

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5
Q

Name the parts of the membranous labyrinths

A
Cochlear duct (within the canal, concerned with hearing)
Utricle and saccule (within the vestibule; concerned with static balance)
Semicircular ducts (within the semicircular canal, concerned with kinetic balance)
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6
Q

What is the nerve supply to the internal ear?

A

CN VIII Vestibulocochlear

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7
Q

How does the cochlear nerve enter the inner ear?

A

Enters the front of the inferior part of the lamina cribrosa

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8
Q

What supplies the macula of the saccule and ampulla of the semicircular duct?

A

The lower division of the vestibular nerve

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9
Q

What does the upper division of the vestibular nerve supply?

A

The macula of the utricle and the ampullae of the anterior and lateral semicircular folds

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10
Q

See text for more

A

ye-ha

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