Ear

Question 1

What is there in order to direct air vibrations into the ear?

Answer 1

Auricle

Question 2

The __________ is a curved tube that leads from the auricle to the tympanic membrane.

Answer 2

external auditory meatus

Question 3

What nerve innervates the lining of the meatus?

Answer 3

auriculotemporal nerve and the auricular branch of the vagus

Question 4

Lymph drainage of the ear goes to what 3 places?

Answer 4

Lymph drainage of the ear is to the superficial parotid, mastoid, and superficial cervical lymph nodes.

Question 5

The middle ear is an air filled cavity in the petrous portion of the _________ bone.

Answer 5

Temporal

Question 6

Lined with a mucous membrane and contains the ___________.

Answer 6

Auditory ossicles

Question 7

The middle ear communicates in front with the nasopharynx via the ______________.

Answer 7

Auditory tube

Question 8

What is the roof of the middle ear?

Answer 8

Tegman tympani

Question 9

What makes up the floor in the middle ear?

Answer 9

superior bulb of the internal jugular vein

Question 10

Anterior wall of the middle ear?

Answer 10

thin plate with two openings.

one for the auditory tube one for tensor tympani tube

Question 11

Posterior wall of the middle ear?

Answer 11

bone with an opening called the aditus to the mastoid antrum, and a small, conical projection called the pyramid.

Question 12

Medial wall of the middle ear?

Answer 12

promontory caused by underyling cochlea
above and behind promontory is the fenestra vestibuli
below and behind promontory is fenestra cochleae (snail shell)

Question 13

Lateral wall of middle ear?

Answer 13

tympanic membrane, obliquely placed, concave laterally

Question 14

Innervation of the tensor tympani is from

Answer 14

a branch of V3

Question 15

Innervation of the stapedius is from

Answer 15

a branch of the facial nerve (CN VII)

Question 16

What does the auditory tube do?

Answer 16

Functions to equalize pressure in the middle ear with atmospheric pressure.

Question 17

Auditory tube connects the anterior wall of the tympanic cavity to the _________.

Answer 17

nasopharynx

Question 18

What structure is the right of way into the tympanic cavity?

Answer 18

auditory tube

Question 19

When the facial nerve arrives at the middle ear it comes through what wall?

Answer 19

Posterior wall

Question 20

the chorda tympani contains __________ fibers and _____________ _____________ fibers destined for the submandibular ganglion.

Answer 20

taste

preganglionic parasympathetic

Question 21

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

Answer 21

petrotympanic fissure