Ear & CN VIII

Question 1

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

Answer 1

optic nerve (CN II)

Question 2

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

Answer 2

vestibulocochlear nerve (CN VIII)

Question 3

What are the 4 features of the external ear?

Answer 3

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

Question 4

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

Answer 4

auricular cartilage

Question 5

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

Answer 5

annular cartilage

Question 6

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

Answer 6

scutiform cartilage

Question 7

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

Answer 7

external auditory meatus

Question 8

What are the 4 features of the inner ear?

Answer 8

petrosal bone; cochlea; semicircular canals; vestibule

Question 9

What are the 6 features of the middle ear?

Answer 9

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

Question 10

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

Answer 10

tympanic bulla

Question 11

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

Answer 11

tympanic cavity

Question 12

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

Answer 12

tympanic membrane

Question 13

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)

Answer 13

malleus; incus; stapes

Question 14

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

Answer 14

pinna

Question 15

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

Answer 15

marginal cutaneous sac

Question 16

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

Answer 16

tragus

Question 17

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

Answer 17

external acoustic meatus (ear canal)

Question 18

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

Answer 18

false - starts wide and ends narrow

Question 19

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

Answer 19

annular cartilage

Question 20

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

Answer 20

auricular

Question 21

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

Answer 21

scutiform

Question 22

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

Answer 22

superficial

Question 23

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

Answer 23

otitis

Question 24

The middle ear is also called the _____ cavity.

Answer 24

tympanic

Question 25

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

Answer 25

membrane; eardrum

Question 26

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

Answer 26

petrosal; temporal

Question 27

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

Answer 27

vestibular

Question 28

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

Answer 28

cochlear

Question 29

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

Answer 29

promontory

Question 30

The _____ forms the synovial joint with the incus.

Answer 30

malleus

Question 31

The _____ forms the synovial joint with the stapes.

Answer 31

incus

Question 32

The _____ moves the vestibular window with each vibration.

Answer 32

stapes

Question 33

This is the smallest bone of the middle ear:

Answer 33

stapes

Question 34

This is the largest bone of the middle ear:

Answer 34

malleus

Question 35

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

Answer 35

malleus

Question 36

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

Answer 36

true

Question 37

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

Answer 37

nasopharynx

Question 38

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

Answer 38

inner

Question 39

This structure is larger and more spheric in cats:

Answer 39

tympanic bulla

Question 40

The malleus, incus, and stapes are auditory _____.

Answer 40

ossicles

Question 41

Another word for the malleus:

Answer 41

hammer

Question 42

Another word for the incus:

Answer 42

anvil

Question 43

Another word for the stapes:

Answer 43

stirrup

Question 44

This auditory ossicle is moderated by the tensor tympani muscle:

Answer 44

malleus

Question 45

This auditory ossicle is moderated by the stapedius muscle:

Answer 45

stapes

Question 46

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

Answer 46

tensor tympani muscle; stapedius muscle

Question 47

The auditory tube opens to the _____.

Answer 47

pharynx

Question 48

The chorda tympani is the branch of the _____ nerve.

Answer 48

facial

Question 49

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

Answer 49

membranous labyrinth

Question 50

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

Answer 50

balance

Question 51

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

Answer 51

inner

Question 52

What nerve is found in the inner ear?

Answer 52

vestibulocochlear nerve

Question 53

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

Answer 53

cochlear

Question 54

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

Answer 54

vestibular

Question 55

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

Answer 55

vestibular

Question 56

Vertigo can result from an infection in the _____ ear.

Answer 56

inner

Question 57

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

Answer 57

vestibule semicircular canals