Combined Ipsilateral Oculomotor Nerve Palsy and Contralateral Downbeat Nystagmus in a Case of Cerebral Infarction

We report a patient with acute cerebral infarction of the left paramedian thalamus, upper mesencephalon and cerebellum who exhibited ipsilateral oculomotor nerve palsy and contralateral downbeat nystagmus. The site of the infarction was considered to be the paramedian thalamopeduncular and cerebella...

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Bibliographic Details
Published in:Case reports in neurology 2014-04, Vol.6 (1), p.134-138
Main Authors: Matsuzono, Kosuke, Manabe, Yasuhiro, Takahashi, Yoshiaki, Narai, Hisashi, Omori, Nobuhiko, Abe, Koji
Format: Article
Language:English
Subjects:
Infarction
Monocular downbeat nystagmus
Oculomotor nerve palsy
Published: April 2014
Superior cerebellar peduncle
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Summary:We report a patient with acute cerebral infarction of the left paramedian thalamus, upper mesencephalon and cerebellum who exhibited ipsilateral oculomotor nerve palsy and contralateral downbeat nystagmus. The site of the infarction was considered to be the paramedian thalamopeduncular and cerebellar regions, which are supplied by the superior cerebellar artery containing direct perforating branches or both the superior cerebellar artery and the superior mesencephalic and posterior thalamosubthalamic arteries. Contralateral and monocular downbeat nystagmus is very rare. Our case suggests that the present downbeat nystagmus was due to dysfunction of cerebellar-modulated crossed oculovestibular fibers of the superior cerebellar peduncle or bilateral downbeat nystagmus with one-sided oculomotor nerve palsy.
ISSN:1662-680X
1662-680X
DOI:10.1159/000362120