Reversed corrective saccades during head impulse test in acute cerebellar dysfunction

Jeong Yoon Choi, Ji Soo Kim, Jin-Man Jung, Do-Young Kwon, Moon Ho Park, Chulhan Kim, June Choi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Patients with cerebellar lesions may show horizontal (positive)- or downward (perverted)-corrective saccades during horizontal head impulse test (HIT). However, corrective saccades in the direction of head rotation (reversed corrective saccades) have not been reported during HIT. We present two patients who showed reversed corrective saccades during horizontal HIT as an initial sign of acute cerebellitis. In contrast to the corrective saccades mostly observed in peripheral vestibular paresis, this paradoxical response indicates abnormally increased vestibulo-ocular responses due to cerebellar disinhibition over the vestibulo-ocular reflex. This paradoxical response should be considered an additional bedside cerebellar sign.

Original languageEnglish
Pages (from-to)243-247
Number of pages5
JournalCerebellum
Volume13
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1

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Keywords

  • Cerebellum
  • Head impulse test
  • Vertigo
  • Vestibulo-ocular reflex

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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