Middle Ear

Question 1

The stapedius muscle originates from the ______ nerve.

Answer 1

FACIAL

Question 2

Binaural localization cues are created by interaural differences in the and of sounds between ears.

Answer 2

TIME, INTENSITY

Question 3

The pyramidal eminence is located on the wall of the tympanum.

Answer 3

POSTERIOR WALL

Question 4

The portion of the tympanum where the head of the malleus and incus can be found is call the:

Answer 4

EPITYMPANUM

Question 5

Density of the radial and concentric fibers of the second layer of the TM is greatest at the:

Answer 5

MIDDLE AND OUTER BORDER

Question 6

The tensor Tympani muscle originates from what cranial nerve?

Answer 6

TRIGEMINAL

Question 7

The tensor tympani tendon enters the tympanum through the:

Answer 7

COCHLEARIFORM PROCESS

Question 8

What are the three functions of the middle ear?

Answer 8

TRANSDUCE, PRESSURE EQUALIZER, INNER EAR PROTECTION

Question 9

What is one of the limitations of the acoustic reflex?

Answer 9

LATENCY BEFORE MUSCLES CONTRACT

Question 10

Because the umbo is displaced less than the rest of the tympanic membrane, an anatomic lever is created. This mechanism is called:

Answer 10

CATENARY LEVER

Question 11

What are the three types of impedence? (Middle ear)

Answer 11

RESISTANCE, MASS, STIFFNESS

Question 12

A fungal growth in the EAM is called a(n)…

Answer 12

OTOMYCOSIS

Question 13

What three properties affect the level of sound pressure arriving at the entrance to the EAM?

Answer 13

FREQUENCY, HEAD SHADOW EFFECT, ANGLE OF INCIDENCE

Question 14

The fossa incudis is located in the tympanum on the _________ wall.

Answer 14

POSTERIOR WALL

Question 15

The stapes footplate is held in the oval window by a ring-shaped ligament called the ________ ligament.

Answer 15

ANNULAR

Question 16

The annulus is attached to a groove in the temporal bone called the _____________.

Answer 16

TYMPANIC SULCUS

Question 17

What is not true of the tympanic cavity?
a- Located in petrous portion of temporal bone 
b- Volume is approx. 4 cm^3
c- It is filled with air
d- Measures approx. ½” X ½” X ¼“  
e- It is also called the tympanum

Answer 17

B. VOLUME IS APPROX 4CM^3

Question 18

The stapedius muscle originates from the __________ cranial nerve.

Answer 18

FACIAL

Question 19

The resonant frequencies of the middle ear are between:
a- 800 - 1500 Hz
b- 2000 - 5000 Hz
c- 250 - 7000 Hz

Answer 19

A. 800 - 1500 HZ

Question 20

The outer ear resonances and middle ear impedance matching work together to effectively transmit sounds between about…

a. 500 - 7000 Hz
b. 2000 - 7000 Hz
c. 250 - 8000 Hz
d. 250 - 7000 Hz

Answer 20

D. 250 - 7000 HZ