Relative atrophy of the flocculus and ocular motor dysfunction in SCA2 and SCA6

Sarah H. Ying, S. I. Choi, M. Lee, S. L. Perlman, R. W. Baloh, A. W. Toga, D. S. Zee

Research output: Contribution to journalArticlepeer-review


Two hereditary ataxia syndromes show distinct profiles of region-specific atrophy and ocular motor deficits. Selective pontine atrophy is associated with slowed saccades in ataxin-2 mutations, and selective floccular atrophy is associated with impaired pursuit and gaze-holding abnormalities in Ca(V)2.1 mutations. Although the flocculus seems to be spared relative to the pons in ataxin-2 mutations, and pursuit and gaze-holding appear to be relatively normal, these can be difficult to assess at the bedside, as corrective saccades are also slow and hard to discern. Here, we show the presence of significant floccular atrophy compared with controls in both ataxin-2 and Ca(V)2.1 mutations, which raises the possibility that abnormalities of smooth pursuit or gaze-holding are present in both conditions.

Original languageEnglish (US)
Pages (from-to)430-435
Number of pages6
JournalAnnals of the New York Academy of Sciences
StatePublished - 2005


  • Ataxin-2
  • Ca(V)2.1
  • Flocculus
  • Hereditary ataxia
  • Pons
  • Saccade

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • History and Philosophy of Science


Dive into the research topics of 'Relative atrophy of the flocculus and ocular motor dysfunction in SCA2 and SCA6'. Together they form a unique fingerprint.

Cite this