Acoustic Immittance - Acoustic Reflex

Question 1

Acoustic Immittance involves what two tests?

Answer 1

Tympanometry - middle ear function

Acoustic Reflex testing

Question 2

Acoustic reflex is the response of the _ _ to a loud sound

Answer 2

Response of the stapedius muscle to loud sound

Question 3

Acoustic reflex is a _ reflex

Answer 3

Bilateral reflex

Question 4

The activator tone is presented at what frequencies?

Answer 4

500, 1000, 2000, 4000 Hz

Question 5

When a reflex occurs SLP in the canal increases or decreases?

Answer 5

Increases

Question 6

For normal listeners, the acoustic reflex is observed at about __ dBSPL for puretones

Answer 6

85-100 dB SPL

Question 7

Afferent is the _ signal which goes towards the brain

Answer 7

Sensory

Question 8

Efferent is the _ signal which goes away from the brain

Answer 8

Motor

Question 9

Right contralateral =

Answer 9

Signal is in the right ear and ART is measured in the left

Question 10

Left contralateral =

Answer 10

Signal is in the left ear and ART is measured in the right

Question 11

Right ipsilateral =

Answer 11

Signal is in the right ear and ART is measured there too

Question 12

Left ipsilateral =

Answer 12

Signal is in the left ear and ART is measured there too

Question 13

To have a normal ART, pure tone detection threshold must be better than (lower than) _ dB HL at that test frequency

Answer 13

50 dBHL

Question 14

The reflex is detected by detecting a decrease in admittance greater than:

Answer 14

0.02 mmho

Question 15

Fast reflex decay is a sign of an:

Answer 15

8th nerve lesion

Question 16

For acoustic reflex decay, you must present the tone at:

Answer 16

10 dB above their ART for 10 seconds

Question 17

If amplitude of the reflex declines by more than 50% of the original amplitude during a period of 5 seconds, this indicates:

Answer 17

A retrocochlear (neural) pathology

Question 18

An abnormal reflex decay is called a:

Answer 18

Positive decay