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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…

A

Utricule

24
Q

The semicircular ducts are concerned with…

A

Balance

25
Q
A

Vestibulocochlear nerve

26
Q
A

Vestibular ganglion

27
Q
A

Vestibular nerve

28
Q
A

Cochlear nerve

29
Q
A

Sacculus

30
Q
A

Scala tympani

31
Q
A

Cochlear duct

32
Q
A

Scala vestibuli

33
Q
A

Helicotrema

34
Q

2

A

Cochlear foramen

(with secundary tympanic membrane)

35
Q

3

A

Ductus reuniens

36
Q

4

A

Utriculosaccular duct

37
Q

Which semicircular ducts fuse to form the common crus

A
  • Anterior duct
  • Posterior duct
38
Q

What is found in the cochlear labyrinth?

A

The organ of corti

39
Q

What is shown?

A

Vestibular + auditory pathway

40
Q
A

Vestibulocochlear nerve (CN-VIII)

41
Q
A

Vestibulocochlear nuclei

42
Q
A

Caudal colliculus

43
Q
A

Rostral colliculus

44
Q
A

Acoustic area

45
Q
A

Medial geniculate nucleus

46
Q
A

Lateral lemniscus nucleus

55
Q

Location of primary neurones concerned with the vestibular + auditory pathways

A
  • Spiral ganglion
  • Vestibular ganglion
  • Cochlea
56
Q

The vestibulocochlear nerve enters the…

A

Trapezoid body

Veterinary Anatomy III (124 decks)

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