What is a head-shake nystagmus test in electronystagmography (ENG)?

Updated: Aug 06, 2019
  • Author: Angela G Shoup, PhD; Chief Editor: Arlen D Meyers, MD, MBA  more...
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The head-shake nystagmus test is most useful in the assessment of vestibular disorders that produce asymmetries in vestibular function. [20, 21, 22, 23]

For this test, the patient is placed in an upright sitting position with his or her head tilted forward 30 degrees. The examiner rotates the head back and forth (45 degrees to either side), completing 30 full cycles at a frequency of about 2 cycles per second. If nystagmus is observed following head rotation, eye movements should be recorded for at least 1 minute.

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