Isolated unilateral infarction of the cerebellar tonsil: Ocular motor findings

Seung Han Lee, Seong Ho Park, Ji Soo Kim, Hyo Jung Kim, Farkhod Yunusov, David S. Zee

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


The oculomotor abnormalities with isolated infarction of the cerebellar tonsil are unknown. In a patient with acute infarction of the right tonsil, we found (1) nearly completely abolished ipsilateral smooth pursuit and impaired contralateral pursuit, (2) a low-amplitude ipsilesional right-beating nystagmus without fixation, (3) gaze-holding deficits, and (4) normal vestibulo-ocular reflex. These findings contrast with striking vestibular abnormalities reported with unilateral flocculus and anterior tonsil infarction. Taken together, these findings allow more diagnostic certainty in cerebellar patients, help resolve controversies about interpretation of experimental findings in monkeys, and clarify homologies between the monkey and human cerebellum. Ann Neurol 2014;75:429-434

Original languageEnglish (US)
Pages (from-to)429-434
Number of pages6
JournalAnnals of neurology
Issue number3
StatePublished - Mar 2014

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology


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