vestibulococh nerve 1 part 1 Flashcards

1
Q
A
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2
Q

Vestibular Division on CN 8

A

Responds to movement of the head and the position of the head

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3
Q

Responds to sound

A

Cochlear Division of CN 8

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4
Q

The inner ear structures are embedded within the

A

temporal bone

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5
Q

bony labyrinth and membranous labyrinth

A

inner ear structures

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6
Q

hair cells

A

membranous labyrinth

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7
Q

correct The bone labyrinth follows most of the contours of the membranous labyrinth

A

 The membranous labyrinth follows most of the contours of the bony labyrinth

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8
Q

Consists of interconnected bony cavities and filled with perilymph

A

Bony Labyrinth

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9
Q

perilymph

A

high na

low in K

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10
Q

membranous ducts within the bony labyrinth

A

Membranous Labyrinth

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11
Q

endolymph

A

(low in Na+ , high in K+ )

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12
Q

endolymph

A

Membranous Labyrinth

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13
Q

eventually reabsorbed

A

endolymph

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14
Q

made by specialized cells in several locations in the membranous labyrinth.

A

endolymph

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15
Q

leaves through a duct, to reach a sac to get to venous systme

A

endolymph

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16
Q

[vertigo, nausea, hearing loss, ringing in the ears

A

obstruction of endolymph flow

17
Q

rank from ant to post

 Vestibule:

Semicircular Canals: 3 on each side: )

 Ampullae

A

vestibule ampullla semicircular canal

19
Q

central enlarged region of bony labrynth

20
Q

dilation at one end of the each semicircular canals

21
Q

function in complimentary pairing

A

L post+ r ant

22
Q

left horizontal and r. horizontal

A

function in complimentary paring

23
Q

Saccule:

A

Oriented vertically

24
Q

located in the bony vestibule

A

utricule sacule

25
Q

Oriented horizontally (when upright)

27
linear (horizontal) acceleration
Utricle
28
Detect angular acceleration  Activated with most head movements
Semicircular canals
29
Detects linear (vertical) acceleration (example?)
saccule
30
static head position
utricle saccule
31
Adjacent to the tallest stereocilia
the single kinocilium (
32
project into endolymphatic interior of the membranous labyrinth
stereocilia
33
endolymph
surrrounds stereocilia
34
High intracellular K+ opens
voltage gated Ca+2 channels Neurotransmitter is released (glutamate)
35
glutamate trigger and triggering CN 8 by
steeocilia
36
moveing toward highest stereocilia
Opens the mechanically gated K+ ion channels • K+ enters the cell •
38
neutral position of stereocilia
gate partially open