Audiology Praxis Questions with Revised Answers All Correct
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Audiology Praxis
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Audiology Praxis
Audiology Praxis Questions with Revised Answers All Correct
What are the functions of the vestibular system? - Answer-1. integrates sensation in the brain stem
2. awareness of one's body position in relation to gravity
3. maintains posture and equilibrium.
What are the four types of nys...
Audiology Praxis Questions with
Revised Answers All Correct
What are the functions of the vestibular system? - Answer-1. integrates sensation in the
brain stem
2. awareness of one's body position in relation to gravity
3. maintains posture and equilibrium.
What are the four types of nystagmus? - Answer-1. spontaneous
2. positional
3. gaze
4. congenital
How are the receptors in the utricle and saccule oriented? - Answer-Urticule are
horizontal and sensitive to linear head movements. Saccule are vertical and sensitive to
vertical movement and vibration.
Describe how SCC respond to head movement. - Answer-Canals respond maximally to
plane stimulation in which they are oriented. Both canals are stimulated. On canal is
hypo-polarized (inhibited) and the other is depolarized (facilitated). The brainstem
integrates the information from the two sides together.
What is the vestibular occular reflex (VOR)? - Answer-head movement in one direction
results in eye movement in the opposite direction.
Describe the four types of nystagmus. - Answer-1.spontaneous: occurs without
vestibular or visual stimulus and does not suppress with visual fixation.
2. positional: occurs with following changes in head position.
3. gaze: occurs following a shift in gaze.
4. congenital: may be seen in young people. A slight nystagmus that doesn't interfere
with daily functioning. Might be genetic.
List the common vestibular disorders and their length of nystagmus. - Answer-seconds
= BPPV
minutes = veterbrobasilar insufficiency
hours = Meniere's
days/weeks = vestibular neuritis and labrynthitis
List the interpeak latencies for an ABR - Answer-I-III 2 msec apart
III-V 2 msec apart
I-V 4 msec apart
, List the conditions that must occur during a Dix-Halpike test in which BPPV would be
positive - Answer-1. delayed onset: 10 seconds after reposition, nystagmus occurs.
Maximum severity occurs at 20-30 seconds and minimizes after 40-60 seconds
2. burst of activity: a sudden onset of nystagmus occurs
3. subjective vertigo: nausea and vomiting
4. fatigable: once the patient returns to upright position, nsytagmus diminishes
What is the ANSI standard for specification for audiometers? - Answer-ANSI S3.6-1996
(revised from 1989 standard).
How are audiometers classified? - Answer-By Type 1, 2, 3, 4,,5 and HF and speech A,
B, and C. The smaller the number, the more features the audiometer has.
List the 5 types of audiometer classifications - Answer-1. Pure tone audiometer
2. Automatic audiometer
3. Speech audiometer
4. Extended High-frequency audiometer
5. Free field equivalent audiometer
List the 5 types of transducers - Answer-1. Supra-Aural earphones
2.Insert earphones
3. Circumaural earphones
4. loudspeakers
5. bone vibrators
What are the most common supra-aural earphones used in audiology clinics? (Make
and model) - Answer-Telephonics TDH 49 and 50
What are the most common insert earphones used in audiology clinics? - Answer-
Etymotic Research (ER) 3A and E-A-RTONE 3A
What are the most common circumaural earphones used in audiology clinics? When are
circumaural earphones used? - Answer-Sennheiser HDA 200; high frequency threshold
testing above 8000 Hz.
What is the difference between the B-71 and B-72 bone vibrator? - Answer-B-71 is
smaller (20g) then the B-72 (48g) and is more commonly used in clinics.
What coupler is used to calibrate supra-aural earphones? - Answer-NBS 9-A or IEC 318
coupler
What coupler is used to calibrate insert earphones - Answer-HA-1, HA-2, of occluded
ear simulator couplers
Describe the transducer function of earphones, bone vibrators, and loudspeakers. -
Answer-Inserts, supra-aural, circumaural earphones and loudspeakers convert electrical
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