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Vanderbilt Audiology Journal Club: What's New in the Clinical Vestibular Sciences?

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1.  What characteristics best describe normal subjects who fail to perceive motion (e.g. spinning) following warm caloric irrigation? They are younger subjects. They are unsteady subjects and older subjects. They are steady subjects. They are under 18 years of age.

2.  Which of the following statements is NOT correct? Remaining stable for 30 seconds while standing on a foam pad with eyes closed is impossible for 68% of healthy individuals over the age of 70 years. There are no changes in the anatomy of the peripheral vestibular system as we age. The investigation demonstrated that perception of motion may be absent following caloric testing despite objective evidence that the peripheral vestibular system is functioning. There are changes in the anatomy of the peripheral vestibular system as we age.

3.  What term did the authors "coin" to describe the phenomena of failure of motion perception following stimulation of the peripheral vestibular system. "failure to suppress" "the Heidelberg effect" "vestibular neglect" "vestibular disconnect"

4.  Which of the following is considered the best stimulus for the skull vibration-induced nystagmus test (SVINT)? 0.001 Hz 10 Hz 100 Hz 1000 Hz

5.  Considering the SVINT, which of the following is true in most cases of peripheral vestibular dysfunction? Vibration-induced nystagmus beats towards the healthy side. Vibration-induced nystagmus beats towards the unhealthy side. Vibration-induced nystagmus beats upwards with superior canal dehiscence. Vibration does not induce nystagmus in patients with vestibular dysfunction.

6.  Considering the SVINT, which of the following is true in patients with superior canal dehiscence? Vibration-induced nystagmus beats towards the healthy side. Vibration-induced nystagmus beats towards the unhealthy side. Vibration-induced nystagmus beats upwards with superior canal dehiscence. Vibration does not induce nystagmus in patients with vestibular dysfunction.

7.  Which of the following is true regarding administration of the SVINT? Vibration must be applied to the vertex and mastoid areas at the same time. The test must be completed with an appropriate visual stimulus so the patient can fixate. Vibration must be applied to the sternocleidomastoid muscle of the neck. The test must be completed with either video-oculography or Frenzel lenses to avoid fixation.

8.  Which one of the following statements is correct? Normal control subjects have overt saccades during HIMP Normal control subjects have the largest anticompensatory saccades during SHIMP Bilateral vestibular loss subjects have the largest anticompensatory saccades during SHIMP Unilateral vestibular loss subjects have the largest anticompensatory saccades during SHIMP

9.  In this paper, "earth-fixed" means the target remains in place when the head moves while a "head-fixed" target means the target moves when the head moves. Which kind of target goes with each test? HIMP uses earth-fixed target, SHIMP uses head-fixed target HIMP uses head-fixed target, SHIMP uses head-fixed target HIMP uses head-fixed target, SHIMP uses earth-fixed target HIMP uses earth-fixed target, SHIMP uses earth-fixed target

10.  Which of the following are crucial for administering a quality HIMP or SHIMP examination? Lights are off during the examination. Subject is taller than examiner. Sufficient head speed during impulses (150-250 degrees/second). Subject wears sound isolating headphones.