Middle Ear

Front 1

What's between the helix and the antihelix?

Back 1

the scaphold fossa

Front 2

Besides the scaphold fossa what other fossa is located on the outer ear? and where in relation to the scaphold fossa?

Back 2

the triangular fossa which is anterior

Front 3

What borders the triangular fossa?

Back 3

the helix
and the two crurae of the anthelix

Front 4

What's basically in the middle of the outer ear?

Back 4

concha

Front 5

Describe the parts of the lower outer ear anterior to posterior then inferior.

Back 5

tragus->intertragal notch->antitragic->lobule

Front 6

What is the concha of the outer ear innervated by?

Back 6

vagus n (CNX)

Front 7

What innervates the rest of the outer ear besides the concha?

Back 7

C2, C3 innervates posterior and inferior both medial and lateral

auriculotemporal n (V3) innervates superior anterior medial and lateral

Front 8

What's another name for outer ear apparently?

Back 8

pinna...it's pulled up and out and back to straighten the EAM

Front 9

What's the innervation of the EAM?

Back 9

the posterior and floor by X,
the anterior and roof is by auriculotemporal n.
the outer layer of the tympanic membrane is dually innervated by these

Front 10

Ear pain can come from distant places innervated by which nerves?

Back 10

V, IX, X and C2, C3. because of development...lucky

Front 11

What are the 3 layers of the tympanic membrane and what innervates them?

Back 11

thin skin (auriculotemporal n and vagus) - fibrous collagenous - thin mucosa (IX)

Front 12

What is the shape of the tympanic membrane?

Back 12

it's conical and concaved externally where the handle of the malleus is at the apex called the umbo.

Front 13

What quadrant is the cone of light found?

Back 13

anterior inferior

Front 14

How is the quadrant system organized on the tympanic membrane?

Back 14

by the manubrium

Front 15

What is just superior and inferior of the middle ear?

Back 15

superior - temporal lobe
inferior - jugular bulb

Front 16

What are the big landmarks of the medial, lateral, anterior and posterior sides of the middle ear?

Back 16

medial - semicircular canals
lateral - tympanic membrane
anterior - internal carotid a
posterior - mastoid air cells and antrum

Front 17

How does the chorda tympani course near the tympanic membrane?

Back 17

It goes between the long process of the incus and the handle of the malleus anteriorly

Front 18

What is the relation of the manubrium of the malleus to the incus?

Back 18

it's anterior

Front 19

where do incisions occur to avoid the ossicles?

Back 19

inferior posterior tympanic membrane

Front 20

Where's the volcano in the middle ear? and what is it made up of?

Back 20

it's on the posterior wall.
it's the pyramidal eminence and the tendon of the stapedius m goes to the stapes anteriorly

Front 21

What are the big landmarks of the medial, lateral, anterior and posterior sides of the middle ear?

Back 21

medial - semicircular canals
lateral - tympanic membrane
anterior - internal carotid a
posterior - mastoid air cells and antrum

Front 22

How does the chorda tympani course near the tympanic membrane?

Back 22

It goes between the long process of the incus and the handle of the malleus anteriorly

Front 23

What is the relation of the manubrium of the malleus to the incus?

Back 23

it's anterior

Front 24

where do incisions occur to avoid the ossicles?

Back 24

inferior posterior tympanic membrane

Front 25

Where's the volcano in the middle ear? and what is it made up of?

Back 25

it's on the posterior wall.
it's the pyramidal eminence and the tendon of the stapedius m goes to the stapes anteriorly

Front 26

What makes up the volcano of the middle ear? and what's in it?

Back 26

the pyramidal eminence and the tendon of the stapedius course anteriorly to connect with the neck of the stapes

Front 27

what makes up the anterior wall of the middle ear?

Back 27

the tensor tympani m in canal and the pharyngotympanic tube

Front 28

What are in the epitympanic recess?

Back 28

the head of the malleus and the body of the incus

Front 29

Where does the chorda tympani go after the tympanic membrane?

Back 29

it goes to the mandibular fossa and exits the bone via the petrotympanic fissure

Front 30

what fibers does the chorda tympani carry?

Back 30

taste to the anterior 2/3 of the tongue and preganglionic parasympathetics to the sublingual and submandibular glands

Front 31

what makes up the superior part of the posterior wall of the middle ear?

Back 31

aditus of the of the mastoid antrum

Front 32

What two canals are in the upper posterior part of the medial wall of the middle ear?

Back 32

the lateral semicircular canal and the facial canal

Front 33

where's the round window?

Back 33

it's posterior and inferior of the promontary

Front 34

what's between the promontary and the facial nerve

Back 34

the footplate of the stapes and the oval window

Front 35

Is the incudostapedial joint synovial?

Back 35

yes

Front 36

where's the tympanic plexus and what does it give off?

Back 36

it's the plexus on the promontary and it gives of the lesser petrosal nerve from IX

Front 37

Where in relation to the promontary does the tendon of the tensor tympani course?

Back 37

superior

Front 38

what do the ossicles do?

Back 38

they link the ear drum and the cochlea...there's two joints

Front 39

what are the 2 main branches of the middle ear?

Back 39

anterior tympanic br of maxillary a via the petrotympanic fissure

stylomastoid br of the posterior auricular a of the facial a

Front 40

the cochlea is ___ and the vestible and the semicircular canals are ___

Back 40

anteriomedial
posteriolateral

Front 41

What goes through the IAM?

Back 41

VII, VIII, labyrinthine a

Front 42

What supplies the inner ear?

Back 42

the labyrinthine (internal auditory) a off the basilar a

Front 43

what is the basilar a?

Back 43

it's the artery that is formed superiorly from the two vertebral arteries

Front 44

conduction deafness results from what?

Back 44

mechanical transmission loss in the external or middle ear

Front 45

What is neural deafness?

Back 45

transmission loss starting at the receptors

Front 46

Bone conduction bypasses what?

Back 46

conduction route of outer-middle ear

Front 47

What is weber's test

Back 47

put the tuning fork at vertex of skull...bone conduction to both ears simultaneously

Front 48

What is rhinne's test?

Back 48

put tuning fork on mastoid process and then next to ear...repeat for other ear

for neural...no hearing in bad ear, but if using bone conduction will localize to bad ear

Front 49

What direction does the facial n course after passing between the cochlea and the vestible?

Back 49

posteriorly at the genu

Front 50

The geniculare ganglion has what kind of neurons?

Back 50

like DRGs (unipolar neurons)

Front 51

Where does the greater petrosal nerve go to from the geniculate ganglion?

Back 51

foramen lacerum