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Isolated unilateral infarction of the cerebellar tonsil: Ocular motor findings
Author(s) -
Lee SeungHan,
Park SeongHo,
Kim JiSoo,
Kim HyoJung,
Yunusov Farkhod,
Zee David S.
Publication year - 2014
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/ana.24094
Subject(s) - medicine , tonsil , cerebellum , infarction , neuroscience , psychology , pathology , cardiology , myocardial infarction
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