Exam Preview for 40092: A Positive Spin on Things: Understanding Ro

A Positive Spin on Things: Understanding Rotary Chair

Please note: exam questions are subject to change.

1. In what clinical situations would VOR suppression be of added value in a vestibular function test? If there is a caloric asymmetry If vHIT RALP and LARP are abnormal If oculomotor testing suggests a cerebellar lesion and/or calorics suggests fixation may be abnormal If there is a question of a brainstem lesion based on Oculomotor studies
2. What are likely reasons rotary chair testing may be invalid? Nausea and foot position Poor tasking or goggle slippage Mascara and patient comfort in chair Time of day and length of test
3. Sinusoidal Harmonic Acceleration assesses what frequencies of oscillation? 0.01Hz-0.64Hz 1Hz-5Hz 250-8000Hz 0.003Hz
4. If a patient exhibits gaze-evoked nystagmus on oculomotor studies and a phase lead pattern on sinusoidal harmonic acceleration with all other peripheral vestibular function studies producing normal result, what pathology may be suspected? Unilateral peripheral Cerebellar Brainstem No pathology
5. What velocity step test pattern best fits with a suggestion of a unilateral peripheral vestibular lesion? High gain, low time constant in one ear, normal results in the other ear without an asymmetry Normal gain and time constant in both ears with an asymmetry leaning toward the suspected ear Low gain with a high time constant in one ear, normal results in the other ear with an asymmetry leaning toward the normal ear Low gain/low time constant in one ear, normal results in the other ear with an asymmetry leaning toward the non-normal ear.