Abnormal head impulse test in a unilateral cerebellar lesion

Seol Hee Baek, Jeong Yoon Choi, Jin Man Jung, Do Young Kwon, Moon Ho Park, June Choi, Ji Soo Kim

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Background The findings of head impulse tests (HIT) are usually normal in cerebella lesions. Case Report A 46-year-old male presented with progressive dizziness and imbalance of 3 weeks duration. The patient exhibited catch-up saccades during bedside horizontal HIT to either side, which was more evident during the rightward HIT. However, results of bithermal caloric tests and rotator chair test were normal. MRI revealed a lesion in the inferior cerebellum near the floccules. Conclusions Ties case provides additional evidence that damage to the floccules or its connections may impair the vestibule-ocular refax only during high-speed stimuli, especially when the stimuli are applied to the contralesional side. By observing accompanying cerebella signs, the abnormal HIT findings caused by a cerebella disorder can be distinguished from those produced by peripheral vestibular disorders.

Original languageEnglish
Pages (from-to)279-282
Number of pages4
JournalJournal of Clinical Neurology (Korea)
Issue number3
Publication statusPublished - 2015 Jul 1


  • Floccules
  • Head impulse test
  • Vertigo
  • Vestibule-ocular refax

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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