Anat Ii - Unit 4 - Lecture 8 - Ear

Front 1

What are the 2 parts of the external ear?

N (93)

Back 1

1) Auricle
2) External Acoustic (auditory) Meatus (Ear Canal)

Front 2

What are the 3 parts of the auricle?

N (930

Back 2

1) Concha
2) Helix
3) Tragus

Front 3

Auricle:
1) Blood Supply by what 2 arts?

2) Nerve supply by what 2 nerves?

Back 3

1) Superficial Temporal
*Posterior Auricular

2) Great Auricular
*Auriculotemporal

Front 4

The External Auditory Meatus (Ear Canal) begins @ (A) and ends @ (B).

N (92)

Back 4

A) Auricle
B) Tympanic Membrae

Front 5

1) Is the auditory meatus straight?

2) How can it be straightened?

Back 5

1) No

2) By pulling the auricle upward and backwards

Front 6

1) The external auditory meatus is lined with what glands?

2) Where are these glands?

3) What do they produce?

Back 6

1) Ceruminous glands

2) Outer 1/3 of external acoustic meatus

3) Cerumen (Ear Wax)

Front 7

What is the other name for the middle ear?

Back 7

Tympanic Cavity

Front 8

What separates the middle ear from the external acoustic meatus?

Back 8

Tympanic Membrane

Front 9

1) The middle ear is separated into what two spaces? - Where are these located?

Back 9

1) Tympanic Cavity - Medial to tympanic membrane
* Epitympanic Recess - Extends above tympanic Cavity

Front 10

The middle ear cavity communicates with what 2 structures?

Back 10

1) Mastoid Air Cells
2) Pharynx

Front 11

The middle ear is innervated by what plexus? - mostly what nerve?

Back 11

Tympanic Plexus - Glossopharyngeal

Front 12

What forms the: N (92)
1) Roof of the Middle ear?
A) Separates middle ear from what?

2) Floor of Middle Ear?
A) Separates middle ear cavity from what?

Back 12

1) Tegmen Tympani
A) Middle Cranial Fossa

2) Thin Bone
A) Superior bulb of Int. Jug. Vein

Front 13

1) What forms lateral wall of middle ear?

Back 13

1) Tympanic Membrane (Eardrum)

Front 14

Tympanic Membrane:
1) Outer surface innervated by what?
2) Posteroinferior part partially innervated by what?
3) Inner surface innervated by what?:

Back 14

1) Auriculotemporal Nerve
2) Vaus
3) Tympanic Plexus - Mostly Glossopharyngeal

Front 15

Tympanic Membrane:
1) Oriented in what 3 directions?
2) What is the apex of its depression called?
3) What causes this?

Back 15

1) Anteriorly, Inferiorly, Laterally
2) Umbo
3) Handle of Malleus

Front 16

Tympanic Membrane: N (93)
1) Upper part is called what?
2) The rest is called what?

Back 16

1) Flaccid part (pars flaccida)
2) Tense part (pars tensa)

Front 17

Tympanic Membrane:
When examined with an otoscope, a bright reflexion radiates from the umbo, what is this reflection called?

Back 17

Cone of Light

Front 18

Medial Wall of Middle Ear (Tympanic Cavity):

1) Formed by what?
2) Contains a bulge formed by the basal coil of cochlea is called what?

Back 18

1) Bone that separates middle ear cavity from inner ear
2) Promontory

Front 19

Medial Wall of Middle Ear (Tympanic Cavity):
1) What lies above and posterior to the promontory?

2) What lies below and posterior to the promontory?

Back 19

1) Oval Window (Fenestra Vestibuli)

2) Round Window (Fenestra Cochlae)

Front 20

Medial Wall of Middle Ear (Tympanic Cavity):
1) Above and posterior to the oval window is what?

2) Above the prominence of the canal of the facial nerve is what?

Back 20

1) Prominence of the canal of the facial nerve

2) Prominence of lateral semicircular canal

Front 21

Medial Wall of Middle Ear (Tympanic Cavity):
1) What are structures are anteriorl?

Back 21

1) Cochleariform Process
2) Semicanal for the Tensory Tympani

Front 22

Anterior Wall of Middle Ear (Tympanic Cavity):
1) Also called what?
2) Separates the middle ear cavity from what?

Back 22

1) Carotid Wall
2) Internal Carotid Artery

Front 23

Anterior Wall of Middle Ear (Tympanic Cavity):
1) Contains an opening for what?
2) Above this opening is another opening for what? - that contains what?
3) There is also another small opening through which, which nerve passes?

Back 23

1) Auditory (Pharyngotympanic) Tube
2) Semicanal - Tensory Tympani
3) Chorda Tympani Nerve

Front 24

Posterior Wall of Middle Ear (Tympanic Cavity):
1) Formed by bone that separates teh middle ear from what?
2) What is the chamber that allows communication to the mastoid air cells?

Back 24

1) Mastoid Air Cells
2) Mastoid Antrum

Front 25

Posterior Wall of Middle Ear (Tympanic Cavity):
1) Below the aditus is a small conical projection called what?
2) This structure houses what?

Back 25

1) Pyramid
2) Stapedius

Front 26

The facial nerve courses in the bone of the posterior wall, where it gives off what 2 nerves?

Back 26

1) Nerve to Stapedius
2) Chorda Tympani

Front 27

What are the auditory ossicles?

Back 27

The bones of the middle ear

Front 28

1) The auditory ossicles transmit what to the tympanic membrane?

2) They articulate with eachother via what type of joints?

Back 28

1) Vibrations

2) Synovial

Front 29

Auditory Ossicles: Malleus
N (92-93)
1) 3 Parts? - Where are they?
2) What are they attached to (3)?
3) What nerve courses on the medial surface of the handle?

Back 29

1) Head - Epitympanic Recess
Neck
Handle - Manubrium
2) Tympanic Membrane
Lat / Ant Processes
3) Chorda Tympani

Front 30

Auditory Ossicles: Incus
Gray's 910

1) Its body articulates with what?
2) It has a long process that projects in what direction?
3) The lower end of the long process bends medially, forming what?

Back 30

1) Head of malleus
2) Downward
3) Lenticular Process

Front 31

Auditory Ossicles: Stapes
Gray's 910
1) The base of the stapes is what shape?
2) Where does it fit into?

Back 31

1) Oval
2) The oval window

Front 32

What are the 2 muscles of the inner ear?

Back 32

1) Tensor Tympani
2) Stapedius

Front 33

Tensory Tympani:
1) Its tendon inserts on what?
2) Innervated by what?
3) Action?

Back 33

1) Handle of the malleus
2) Mandibular Nerve
3) Pulls manubrium medially

Front 34

Stapedius:
1) Its tendon inserts on whhat?2) Innervated by what nerve?
3) Action?

Back 34

1) Neck of stapes
2) Facial Nerve
3) Pulls stapes posteriorly --> tilts its base --> dampened oscillations

Front 35

1) The tympanic nerve is a branch of what nerve?
2) What type of fibers does it carry?
3) Forms what plexus?

Back 35

1) Glossopharyngeal
2) Preganglionic Parasympathetic Fibers
3) Tympanic Plexus

Front 36

1) What tympanic plexus is sensory to mucosa of middle ear, including what?

2) Pregangionlic Parasympathetic fibers leave teh Tympanic Plexus to form what?

Back 36

1) Tympanic Membrane
2) Lesser petrosal nerve

Front 37

Name 3 branches of the facial nerve?

Back 37

1) Greater Petrosal Nerve (@ Geniculate Ganglion)

2) Branch to Stapedius

3) Chorda Tympani

Front 38

Inner Ear:
1) What are the complicated series of spaces inside the petrous part of teh temporal bone?
2) In the bony labyrinth their are fluid filled sacs - what are they called?

Back 38

1) Bony Labyrinth
2) Membranous Labyrinth

Front 39

Inner Ear:
1) Within these spaces are which 2 organs - What are they for?

Back 39

1) Cocheal - Hearing
2) Vestibular Apparatus - Equilibrium

Front 40

N (95)
1) What is the spiral bony core of the inner ear?
2) The (A) begins @ the oval window, spirals, then passes through a channel called the (B)

Back 40

1) Modiolus
2 A) Scala Vestibuli
B) Helicotrema

Front 41

Inner Ear:
1) The helicotrema becomes continuous with what?
2) Where does this terminate?

Back 41

1) Scala Tympani
2) Round Window

Front 42

Inner Ear:
1) Spaces are filled with what?
2) What keeps this in place?

Back 42

1) Perilymph
2) Footplate of stapes
Secondary tympanic membrane

Front 43

Inner Ear:
1) What is b/t the scala vestibuli and scala tympani?
2) The cochlear duct is filled with what?
3) What does it contain?

Back 43

1) Cochlear Duct (Scala Media)
2) Endolymph
3) Spiral Organ of Corti

Front 44

What is the organ for hearing?

Back 44

Spiral organ of Corti

Front 45

The vestibular organ consists of 2 sets of fluid filled chambers:
1st part: consists of what 2 sacs?

2nd part: consists of what?

Back 45

1) Utricle
Saccule

2) 3 semicircular canals

Front 46

Anat II
Unit 4
Lecture 8
Ear

Back 46

Anat II
Unit 4
Lecture 8
Ear