CSD 3103
ANATOMY OF SPEECH
AND HEARING MECHANISMS
HOMEWORK FOR THE OUTER AND MIDDLE EAR
FALL SEMESTER 2008
DUE: September 15, 2006
Multiple
Choice
1. Cerumen is produced in the
a)
entire external auditory canal
b)
cartilaginous external auditory canal
c)
osseous external auditory canal
d)
temporomandibular joint
2. The portion of the tympanic membrane in
which the malleus is
embedded is the
a)
umbo
b)
annulus
c)
cone of light
d)
pars tensa
3. The portion of the tympanic membrane
that does not contain the
fibrocartilaginous
layer is the
a)
umbo
b)
pars tensa
c)
pars flaccida
d)
annulus
4. The point of maximum retraction of the
tympanic membrane is the
a)
annulus
b)
concha
c)
umbo
d)
pars flaccida
5. The resonant frequency of the external
auditory canal is
a)
500-2000 Hz
b)
3000-5000 Hz
c)
8000-10,000 Hz
d)
10,000-12,000 Hz
6. The innermost layer of the tympanic
membrane (the middle ear side)
is covered with
a)
epidermis (skin)
b)
fibrous material
c)
mucous membrane
d)
muscle
7. The cone of light of the tympanic
membrane is
a)
a sign of pathology
b)
also referred to as the light reflex
c)
only seen in children
d)
caused by scar tissue
8. The chain of bones in the middle ear is
called the
a)
malleus
b)
incus
c)
stapes
d)
ossicles
9. The manubrium is part of the
a)
malleus
b)
incus
c)
stapes
d)
eustachian tube
10. The eustachian tube connects the middle
ear with the
a)
outer ear
b)
inner ear
c)
nasopharynx
d)
nose
Matching
Match
the term from the box on the right with its definition.
|
_____
1. |
The
largest of the ossicles, which is attacted to the tympanic membrane |
a. Aditus ad antrum |
|
_____
2. |
The
VIIth cranial nerve |
b. Crus |
|
_____
3. |
The
second bone in the ossicular chain that connects the malleus to the stapes |
c. Epitympanic recess |
|
_____
4. |
The
chain of three tiny bones in the middle ear |
d. Eustachian tube |
|
_____
5. |
A
space in the superior portion of the middle ear |
e. Facial nerve |
|
_____
6. |
The
Vth cranial nerve |
f. Incus |
|
_____
7. |
A
small muscle that can impede movement of the malleus |
g. Malleus |
|
_____
8. |
The
attic of the middle ear space |
h. Mucous membrane |
|
_____
9. |
The
moist lining of the middle ear space |
i. Ossicles |
|
_____
10. |
In
anatomy, a leg, as of the stapes |
j. Oval window |
|
_____
11. |
A
membrane separating the middle ear from the inner ear |
k. Round window |
|
______12. |
A
channel connecting the middle ear to the nasopharynx |
l. Stapedius muscle |
|
_____
13. |
The
smallest of the ossicles, which stands in the oval window |
m. Stapes |
|
_____
14. |
A
membrane, supporting the footplate of the stapes, that separates the middle
ear from the inner ear |
n. Tensor tympani muscle |
|
_____
15. |
A
small muscle, connected to the stapes that impedes movement of the ossicles
when it is contracted |
o. Trigeminal nerve |
Labeling:
Short
Answer
5
pts. 1. Describe all the ways you can think of that the outer ear
protects the tympanic membrane.
5
pts. 2. The middle ear is often described as an impedance matcher
between the outer ear and the inner ear.
Why is it necessary for the middle ear to do this?? What would happen if the middle ear
wasn’t there and sounds entered the cochlea directly?
5
pts. 3. Describe the acoustic reflex. What is the theoretical purpose of the reflex?