Exam Preview

vHIT & SHIMP: Insights to a New Frontier

---

1.  What is the definition of a saccade? A lightbar stimulus Where the oculomotor and vestibular systems synthesize information in the brain The fastest eye movement a patient can generate A cool new dance move we all should try

2.  The vestibulocular reflex (VOR) is: A reflexive eye movement that stabilizes images on the retina by producing eye Has a gain near 1.0 in patients without vestibular function Both A & B Neither A or B

3.  Which of the following semicircular canals work in pairs to determine eye movement? Right lateral and left lateral semicircular canals Left anterior and right posterior semicircular canals Right anterior and left posterior semicircular canals All of the above

4.  What types of symptoms are expected when there is damage to a semicircular canal? Static Dynamic Both A & B None of the above

5.  During SHIMP, what is being measured? The VOR gain and the size of the corrective saccade The patient's age The patient's caloric asymmetry All aspects of oculomotor function

6.  What is NOT a reason to use equipment for assessing vHIT and SHIMP? Identification of covert saccades in vHIT Objective analysis with normative data Having another cool tool in your clinic Better patient comfort during testing

7.  The _______ for vHIT and SHIMP results for a patient should be very similar. Gain Covert saccade amplitude Latency Asymmetry ratio

8.  Which of the following statements about vHIT testing is true? vHIT can be performed without the use of any technology vHIT results are always indicative of a central pathology vHIT can help to identify the presence of covert saccades None of the above are true

9.  Which of the following are true of covert saccades? Covert saccades can easily be seen with the naked eye Covert saccades happen about 70 msec from the onset of head movement Both A & B None of the above

10.  How would you describe the anatomy of HIMP and SHIMP? The basic anatomy and physiology of HIMP and SHIMP are the same The basic anatomy and physiology of HIMP and SHIMP are completely different The anatomy of HIMP and SHIMP are the same, but not the physiology None of the above