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LMUCVM Anatomy I > Ear & CN VIII > Flashcards

Ear & CN VIII Flashcards

1
Q

This cranial nerve is only sensory, no motor, and is associated with the optic disc in the retina:

A

optic nerve (CN II)

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2
Q

This cranial nerve is only sensory, no motor, and is associated with vision and balance:

A

vestibulocochlear nerve (CN VIII)

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3
Q

What are the 4 features of the external ear?

A

auricular cartilage; annular cartilage; scutiform cartilage; external auditory meatus

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4
Q

This part of the external ear gives the ear its shape:

A

auricular cartilage

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5
Q

This part of the external ear joins the auricular cartilage with the skull:

A

annular cartilage

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6
Q

This part of the external ear is the free cartilage in the middle of the muscles:

A

scutiform cartilage

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7
Q

This part of the external ear is the ear canal, which moves vibrations to the middle ear:

A

external auditory meatus

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8
Q

What are the 4 features of the inner ear?

A

petrosal bone; cochlea; semicircular canals; vestibule

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9
Q

What are the 6 features of the middle ear?

A

tympanic bulla; tympanic cavity; tympanic membrane; malleus; incus; stapes

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10
Q

This part of the middle ear expands the tympanic cavity. It is bony and semispheric.

A

tympanic bulla

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11
Q

This part of the middle ear is filled with air and is connected with the pharynx by tube.

A

tympanic cavity

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12
Q

This part of the middle ear is the limit between the external and middle ear, and receives vibrations from the external ear:

A

tympanic membrane

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13
Q

Have synovial joints and related muscles of the middle ear. Inside air-filled cavity. They transmit vibrations from the tympanic membrane to the inner ear.
(hint - there are 3)

A

malleus; incus; stapes

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14
Q

What is another name for the auricle of the external ear?

A

pinna

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15
Q

This structure of the external ear is formed by the skin surrounding the ear and serves no special function:

A

marginal cutaneous sac

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16
Q

This structure of the external ear is very prominent and can be used to access the external meatus if cut:

A

tragus

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17
Q

This structure of the external ear is a cone-shaped canal that transmits information and travels to the tympanic membrane:

A

external acoustic meatus (ear canal)

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18
Q

True or false?
The external acoustic meatus starts narrow and ends wide.

A

false - starts wide and ends narrow

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19
Q

This cartilage of the external ear is smaller, ring-shaped, and connected with the temporal bone:

A

annular cartilage

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20
Q

The _____ cartilage of the external ear is longer and harder.

A

auricular

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21
Q

The _____ cartilage is an “L” shaped free cartilage, meaning it is not joined to other things, located in the middle of auricular muscles.

A

scutiform

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22
Q

The scutiform cartilage is [superficial/deep] to the temporal muscle.

A

superficial

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23
Q

Group of inflammatory diseases of the middle ear.
(hint - very common in cocker spaniels)

A

otitis

24
Q

The middle ear is also called the _____ cavity.

A

tympanic

25
Q

The tympanic cavity is bound laterally by the tympanic _____, also known as the _____.

A

membrane; eardrum

26
Q

The tympanic cavity is bound medially by the ____part of the _____ bone.

A

petrosal; temporal

27
Q

The _____ window (oval) is dorsal, connects to the vestibule, covered by footplate of the stapes.

A

vestibular

28
Q

The _____ window (round) is ventral, connects to cavity of cochlea, covered by secondary tympanic membrane.

A

cochlear

29
Q

Ventral to both the vestibular and cochlear windows, the medial wall bulges over the cochlea forming the:

A

promontory

30
Q

The _____ forms the synovial joint with the incus.

A

malleus

31
Q

The _____ forms the synovial joint with the stapes.

A

incus

32
Q

The _____ moves the vestibular window with each vibration.

A

stapes

33
Q

This is the smallest bone of the middle ear:

A

stapes

34
Q

This is the largest bone of the middle ear:

A

malleus

35
Q

This middle ear bone is attached to the tympanic membrane and is the first to transmit vibrations:

A

malleus

36
Q

True or false?
Humans don’t have a tympanic bulla.

A

true

37
Q

The tympanic bulla connects to the _____ through the auditory tube.

A

nasopharynx

38
Q

Infection from the tympanic bulla can travel to the _____ ear, which is dangerous.

A

inner

39
Q

This structure is larger and more spheric in cats:

A

tympanic bulla

40
Q

The malleus, incus, and stapes are auditory _____.

A

ossicles

41
Q

Another word for the malleus:

A

hammer

42
Q

Another word for the incus:

A

anvil

43
Q

Another word for the stapes:

A

stirrup

44
Q

This auditory ossicle is moderated by the tensor tympani muscle:

A

malleus

45
Q

This auditory ossicle is moderated by the stapedius muscle:

A

stapes

46
Q

These 2 muscles regulate how much vibration will come from the tympanic membrane to the vestibular membrane:

A

tensor tympani muscle; stapedius muscle

47
Q

The auditory tube opens to the _____.

A

pharynx

48
Q

The chorda tympani is the branch of the _____ nerve.

A

facial

49
Q

In the inner ear, the membrane that forms the organs that live inside the bony labyrinth is the:

A

membranous labyrinth

50
Q

The anterior, lateral, and posterior semicircular canals are part of the vestibular portion of the inner ear, so they are related to _____.

A

balance

51
Q

The membranous and bony labyrinths are part of the _____ ear.

A

inner

52
Q

What nerve is found in the inner ear?

A

vestibulocochlear nerve

53
Q

You can’t hear when you have a problem with the [cochlear/vestibular] nerve.

A

cochlear

54
Q

You cant maintain your balance when you have a problem with the [cochlear/vestibular] nerve.

A

vestibular

55
Q

The _____ nucleus is in the brain stem of the mesencephalon.

A

vestibular

56
Q

Vertigo can result from an infection in the _____ ear.

A

inner

57
Q

These (3) structures are related to balance and the vestibular portion of the vestibulocochlear nerves:

A

vestibule semicircular canals

LMUCVM Anatomy I (7 decks)

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