What is the role of the rotating-chair test in the diagnosis of dizziness, vertigo, and imbalance?

Updated: Mar 13, 2017
  • Author: Hesham M Samy, MD, PhD; Chief Editor: Robert A Egan, MD  more...
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Answer

The rotating-chair test (ie, SHA) is used to evaluate the integrity of the vestibulo-ocular reflex (VOR) in the low-frequency (0.1-0.32 Hz) range and, sometimes, in the high-frequency (1-4 Hz) range. The measured parameters are VOR gain, phase (latency), and symmetry. The test is most useful in determining the degree of central vestibular compensation and the residual vestibular function in cases of bilateral vestibular loss. It is not advised on a routine basis for all patients who report dizziness.


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