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Veterinary Anatomy III > THRC.19 > Flashcards

THRC.19 Flashcards

1
Q

Components of the internal ear

A

Membranous labyrinth

Interconnected series of membranous fluid-filled ducts

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2
Q

Fluid inside the membranous labyrinth

A

Endolymph

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3
Q

The components of the membranous labyrinth

A
  • Vestibular labyrinth (balance)
  • Cochlear labyrinth (hearing)
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4
Q

Vestibular and cochlear labyrinth communicate through…

A

Ducts reuniens

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5
Q

The membranous labyrinth is surrounded by…

A

Osseous labyrinth

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6
Q

Components of the bony labyrinth

A
  • Vestibule
  • Semicircular canals
  • Cochlea
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7
Q
A

Osseus labyrinth (dog)

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8
Q
A

Cochlea

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9
Q
A

Vestibule

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10
Q
A

Osseous ampulla

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11
Q
A

Anterior semicircular duct

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12
Q
A

Lateral semicircular duct

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13
Q
A

Common crus

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14
Q
A

Posterior semicircular duct

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15
Q

The cochlea forms a spiral shape around…

A

Modiolus (hollow core of bone)

  • This contains the cochlear nerve
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16
Q

What is shown?

A

Cross section of a cochlea

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17
Q
A

Helicotrema

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18
Q
A

Spiral lamina (shelf structure)

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19
Q
A

Modiolus

Containing the cochlear nerve

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20
Q

The spiral lamina incompletely splits the lumen into which two portions?

A
  • Scala tympani
  • Scala vestibuli
21
Q

What is found in the spiral lamina?

A

The spiral ganglion of the cochlear nerve

22
Q

Components of the vestibular labyrinth

A
  • Saccule
  • Utricle
  • Semicircular ducts
23
Q

The semicircular ducts arise from the…

24
Q

The semicircular ducts are concerned with…

25
Vestibulocochlear nerve
26
Vestibular ganglion
27
Vestibular nerve
28
Cochlear nerve
29
Sacculus
30
Scala tympani
31
Cochlear duct
32
Scala vestibuli
33
Helicotrema
34
2
Cochlear foramen | (with secundary tympanic membrane)
35
3
Ductus reuniens
36
4
Utriculosaccular duct
37
Which semicircular ducts fuse to form the common crus
* Anterior duct * Posterior duct
38
What is found in the cochlear labyrinth?
The organ of corti
39
What is shown?
Vestibular + auditory pathway
40
Vestibulocochlear nerve (CN-VIII)
41
Vestibulocochlear nuclei
42
Caudal colliculus
43
Rostral colliculus
44
Acoustic area
45
Medial geniculate nucleus
46
Lateral lemniscus nucleus
55
Location of _primary_ neurones concerned with the vestibular + auditory pathways
* Spiral ganglion * Vestibular ganglion * Cochlea
56
The vestibulocochlear nerve enters the...
Trapezoid body

Veterinary Anatomy III (124 decks)

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