Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
39 Cards in this Set
- Front
- Back
|
The tympanic membrane (ear drum) is located at the _________ of the _____. It forms the lateral wall of the ______ ____ ______.
|
termination, EAM, middle ear cavity
|
|
|
List the five descriptions of the appearance of the TM.
|
Smooth
Pearl Gray Translucent Concave (cone shaped) Small Mass (14 milligrams) |
|
|
The fact that the TM is concave and has a small mass makes it ________ to ________ and _________ to sound nature. It adds to _________ of sound and _______ of ear.
|
conducive, receiving, reacting, perception, function.
|
|
|
The superior margin of the EAM is at a ____ degree angle.
|
140
|
|
|
The ________ which is a fibrocartilaginous ring holds the ________ ______ into place.
|
annulus, tympanic membrane
|
|
|
What is a depression in the tympanic membrane that houses the annular ring?
|
Tympanic sulcus
|
|
|
The upper portion of the tympanic membrane is what?
|
The Notch of Rivinius
|
|
|
What are the the 3 layers of TM tissue?
|
Cutaneous (continuous with lining of EAM)
Fibrous (middle layer) Mucous (continuous with lining of middle ear - inner most layer) |
|
|
What are the two sub layers of the fibrous lining of the TM?
|
Radial Fibers
Circular Fibers |
|
|
When superimposed, what looks like a spider web - built for resiliency and strength?
|
Circular Fibers
|
|
|
In the lateral view of the TM, the smaller, narrower part is the _____ ________ and the larger porrtion is the _____ _______.
|
pars flaccida, pars tensa
|
|
|
When looking at an ear with a light, this reflects back but it is not an anotomical part of the auditory mechanism but represents a healthy ear drum.
|
Cone of Light
|
|
|
In the left ear, you will see part of the ossicles pointing to ___ o'clock and in the right ear you will see it pointing to ___ o'clock.
|
11, 1
|
|
|
Where does the malleus attach to the tympanic membrane?
|
at the umbo
|
|
|
The tympanic cavity is an irregular space within the ______ _______ of the temporal bone.
|
petrous portion
|
|
|
What is the ceiling of the tympanic cavity?
|
Epitympanic recess
|
|
|
The epitympanic recess is largely occupied by the head of the _______ and the bulk of the ______.
|
malleus, incus
|
|
|
The side view of the the tympanic cavity measures ___ mm ant-post and ___ mm ant-post.
|
15, 15
|
|
|
From the front view, the tympanic cavity looks somewhat like an ____ ____ and measures __ mm sup, __ mm med, and __ mm inf.
|
hour glass, 6, 2, 4
|
|
|
What is one of the most dense areas of bone in the body?
|
The petrous portion of the temporal bone
|
|
|
What is the entrance to the tympanic cavity?
|
Aditus to Antrum
|
|
|
What is the thin sheet of bone at the superior margin of the middle ear?
|
Tegmen Tympani
|
|
|
The tegmen tympani separates the tympanic cavity from the _______ and the meningeal coverings of the _____.
|
cranium, brain
|
|
|
Before the opening of the tympanic membrane is the _____ ______. The protrudence behind the auricle are the ______ _______. They have a ________ look - lots of air space.
|
mastoid antrum, mastoid bones, spongy
|
|
|
What is the superior wall of the middle ear cavity?
|
Tegmental
|
|
|
What is the inferior wall of the middle ear cavity?
|
jugular
|
|
|
What is the posterior wall of the middle ear cavity?
|
mastoid
|
|
|
What is the anterior wall of the middle ear cavity?
|
carotid
|
|
|
What is the lateral wall of the middle ear cavity?
|
membranous
|
|
|
What is the medial wall of the middle ear cavity?
|
labrinthian
|
|
|
What forms an eminence in the middle ear cavity?
|
jugular fossa
|
|
|
What are the four landmarks of the medial (labyrinthian) wall?
|
oval window (fenestra vestibule)
round window (fenestra rotunda) promontory prominence of the facial nerve canal |
|
|
The oval window is occupied by the _________ of the _______.
|
footplate, stapes
|
|
|
What are the 3 landmarks of the posterior (mastoid) wall?
|
tympanic aditus
pyramidal eminence fossa incudis |
|
|
The pyramida eminence contains the _______ ______.
|
stapedius muscle
|
|
|
What is a small evacuation in the lower back part of the epitympanic recess that accommodates the short process of the incus?
|
fossa incudis
|
|
|
Which wall of the middle ear cavity houses the auditory tube opening?
|
The anterior (carotid) wall
|
|
|
Which wall has the cochlear form process canal for the tensor tympani muscle?
|
The anterior (carotid) wall
|
|
|
Most of the lateral wall of the tympanic cavity is formed by the _________.
|
eardrum
|
