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Oculomotor abnormalities and MRI findings in idiopathic cerebellar ataxia

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Abstract

Extensive oculomotor testing and quantitative MRI evaluation was performed in seven patients with idiopathic cerebellar ataxia without extracerebellar symptoms (IDCA-C) and in ten patients with additional extracerebellar symptoms (IDCA-P). The most severe oculomotor deficits were disturbed smooth pursuit, optokinetic nystagmus and suppression of the vestibulo-ocular reflex (VOR). The symptoms correlated well and consistently with the amount of atrophy of the flocculus and the dorsal vermis. These correlations, however, were not specific, and deficits also correlated with the amount of atrophy of other cerebellar structures. No correlation was found between saccade velocity and brain-stem atrophy or between saccade metrics and atrophy of the dorsal vermis. Although patients with IDCA-P had more severe oculomotor deficits than patients with IDCA-C, the pattern of the oculomotor disturbances was the same for both groups. Thus, eye movement analysis alone is not sufficient to distinguish between patients with pure cerebellar ataxia and those with additional extracerebellar symptoms.

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Authors and Affiliations

  1. Abteilung für Neurologie, Eberhard-Karl-Universität, Hoppe-Seyler-Strasse 3, D-72076, Tübingen, Germany

    M. Fetter, T. Klockgether, J. B. Schulz, E. Koenig & J. Dichgans

  2. Abteilung für Neuroradiologie, Eberhard-Karl-Universität, Hoppe-Seyler-Strasse 3, D-72076, Tübingen, Germany

    J. Faiss

Authors
  1. M. Fetter
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  2. T. Klockgether
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  3. J. B. Schulz
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  4. J. Faiss
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  5. E. Koenig
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  6. J. Dichgans
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Fetter, M., Klockgether, T., Schulz, J.B. et al. Oculomotor abnormalities and MRI findings in idiopathic cerebellar ataxia. J Neurol 241, 234–241 (1994). https://doi.org/10.1007/BF00863774

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  • DOI: https://doi.org/10.1007/BF00863774

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