External and Middle Ear

Question 1

The ear consists of the following:
_______
_______
_______

Answer 1

External Ear
Middle Ear
Internal Ear

Question 2

Another name for the Middle ear is:

Answer 2

Tympanic Cavity

Question 3

Another name for the Internal Ear is:

Answer 3

Labyrinth

Question 4

The Labyrinth contains the organs of _______ and _______.

Answer 4

Hearing and Balance

Question 5

The _________ contains the organs of hearing and balance.

Answer 5

Internal Ear (or Labyrinth)

Question 6

The External Ear consists of the _______ and the ______________.

Answer 6

Auricle (or pinna)

External Auditory Meatus

Question 7

The _______ has a characteristic shape that allows it to collect air vibrations.

Answer 7

Auricle (or Pinna)

Question 8

The auricle (or Pinna) consists of a thin plate of _______ _________ covered by skin. It has both ______ and _______ muscles which are innervated by the _________ nerve.

Answer 8

Elastic cartilage
Extrinsic and intrinsic
Facial (CN VII)

Question 9

The Pinna (auricle) is innervated by ________.

Answer 9

(VII) Facial Nerve

Question 10

The outer third of the external auditory meatus is composed of ____ _____, and the inner two-thirds is ______.

Answer 10

Elastic cartilage

Bone

Question 11

The sensory nerve supply of the lining of the external auditory meatus is from the _____ nerve and the _______ branch of the _______ nerve.

Answer 11

auriculotemporal
Auricular
Vagus (CN X)

Question 12

The lymph drainage of the external auditory meatus is to the ____ ______, _________, and _______ ________ lymph nodes.

Answer 12

Superficial parotid
Mastoid
Superficial cervical

Question 13

The _______ ________ is pearly gray and concave.

Answer 13

Tympanic membrane

Question 14

There is a depression in the center of the tympanic membrane called the _____.

Answer 14

Umbo

Question 15

The middle ear is an air filled cavity in the _____ portion of the ______ bone.

Answer 15

Petrous

Temporal

Question 16

The middle ear is lined with a mucous membrane and contains the ______ _______.

Answer 16

Auditory ossicles

Question 17

The middle ear communicates in front with the nasopharynx via the _______ ______ and behind with the ______ ________.

Answer 17

Auditory tube

Mastoid antrum

Question 18

The ______ ear can be thought of as a small room with roof, floor, anterior and posterior walls, and medial and lateral walls.

Answer 18

Middle

Question 19

The auditory ossicles are the ______, ________, and _________.

Answer 19

Malleus
Incus
Stapes

Question 20

The _____ is the largest of the ossicles and has a process called the ________ that is attached to the medial surface of the tympanic membrane.

Answer 20

Malleus

Handle

Question 21

Fenestra Vestibuli means….

Answer 21

The oval window

Question 22

The base of the ______ fits into the fenestra vestibuli.

Answer 22

Stapes

Question 23

What are the 2 muscles associated with the ossicles?

Answer 23

Tensor Tympani

Stapedius

Question 24

The tensor tympani originates in the ________________ and ___________.

It inserts on the _________

Answer 24

Wall of the auditory tube
Its own canal
Handle of the malleus

Question 25

The innervation of the tensor tympani is from a branch of ____.

Its action is to ________.

Answer 25

V3

Dampen vibrations of the tympanic membrane

Question 26

The strapedius originates from the ______ on the posterior wall of the middle ear.

It inserts on the __________.

Answer 26

Pyramid

Neck of the stapes

Question 27

The innervation of the stapedius is from a branch of the ___________ nerve.

Its action is to:

Answer 27

Facial (CNVII)

Dampen the vibrations of the stapes

Question 28

The ________ _____ functions to equalize pressure in the middle ear with atmospheric pressure.

Answer 28

Auditory tube

Question 29

The ______ ________ communicates with the middle ear by way of the aditus. It communicates inferiorly with the mastoid air cells.

Answer 29

Mastoid antrum

Question 30

When the Facial Nerve (CN VII) reaches the bottom of the internal auditory meatus, it enters the ____ _______.

The nerve runs laterally above the vestibule of the inner ear until it reaches the medial wall of the middle ear where it expands to from the _______ __________.

The nerve then bends sharply backward above the promontory.

Answer 30

Facial canal

Geniculate ganglion

Question 31

The facial nerve descends in the posterior wall of the middle ear, behind the pyramid, where it gives a branch to the _______ muscle.

Answer 31

Stapedius

Question 32

The bend of the facial canal is called the _______.

Answer 32

Genu

Question 33

Which cranial nerve emerges through the sylomastoid foramen?

Answer 33

Facial nerve (CN VII)

Question 34

The _____ ______ arises from the facial nerve just above the stylomastoid foramen.

Answer 34

Chorda tympani

Question 35

The chorda tympani exits the middle ear through the _________ _______ to enter the infratemporal fossa to join the lingual nerve.

Answer 35

Petrotympanic fissure

Question 36

The chorda tympani contains _____ fibers and ______ _____ fibers destined for the submandibular ganglion.

Answer 36

Taste

Preganglionic parasympathetic

Question 37

The _______ nerve arises from the glossopharyngeal nerve just below the jugular foramen. It passes through the floor of the middle ear and onto the promontory, where it splits into branches forming the _______ plexus. The plexus supplies the mucosa of the middle ear and gives off the ______ ________ nerve, which contains _______ ________ fibers destined for the _______ ganglion.

Answer 37

Tympanic
Tympanic
Lesser petrosal 
Preganglionic parasympathetic 
Otic

Question 38

The lesser petrosal nerve exits the skull through the ______ ______ and joins the _____ __________.

Answer 38

Foramen ovale

Otic ganglion