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Covert Anti-Compensatory Quick Eye Movements during Head Impulses

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  • Maria Heuberger
  • Murat Sağlam
  • Nicholas S Todd
  • Klaus Jahn
  • Erich Schneider
  • Nadine Lehnen

Abstract

Background: Catch-up saccades during passive head movements, which compensate for a deficient vestibulo-ocular reflex (VOR), are a well-known phenomenon. These quick eye movements are directed toward the target in the opposite direction of the head movement. Recently, quick eye movements in the direction of the head movement (covert anti-compensatory quick eye movements, CAQEM) were observed in older individuals. Here, we characterize these quick eye movements, their pathophysiology, and clinical relevance during head impulse testing (HIT). Methods: Video head impulse test data from 266 patients of a tertiary vertigo center were retrospectively analyzed. Forty-three of these patients had been diagnosed with vestibular migraine, and 35 with Menière’s disease. Results: CAQEM occurred in 38% of the patients. The mean CAQEM occurrence rate (per HIT trial) was 11±10% (mean±SD). Latency was 83±30 ms. CAQEM followed the saccade main sequence characteristics and were compensated by catch-up saccades in the opposite direction. Compensatory saccades did not lead to more false pathological clinical head impulse test assessments (specificity with CAQEM: 87%, and without: 85%). CAQEM on one side were associated with a lower VOR gain on the contralateral side (p

Suggested Citation

  • Maria Heuberger & Murat Sağlam & Nicholas S Todd & Klaus Jahn & Erich Schneider & Nadine Lehnen, 2014. "Covert Anti-Compensatory Quick Eye Movements during Head Impulses," PLOS ONE, Public Library of Science, vol. 9(4), pages 1-4, April.
    • Handle: RePEc:plo:pone00:0093086
    DOI: 10.1371/journal.pone.0093086
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