Ocular tremor in Parkinson's disease: The debate is not over

Authors

  • Christian Duval PhD

    Corresponding author
    1. Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montréal, Québec, Canada
    2. Département de Kinanthropologie, Université du Québec à Montréal, Montréal, Québec, Canada
    • Correspondence to: Dr. Christian Duval, Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, 4545 Chemin Queen-Mary, Montréal, Québec, Canada, H3W 1W4; duval.christian@uqam.ca

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  • Funding agencies: The author is currently funded by the Natural Sciences & Engineering Research Council of Canada, the “Fonds de Recherche Québec-Santé” and the Canadian Institutes for Health Research.

  • Relevant conflicts of interest/financial disclosures: Nothing to report.

  • Full financial disclosures and author roles may be found in the online version of this article.

ABSTRACT

Recent evidence tends to suggest that ocular tremor can be present in patients with Parkinson's disease (PD). This ocular tremor may have frequency characteristics similar to those of PD limb tremor. This fact was recently challenged in an article demonstrating that ocular tremor could simply be the consequence of vestibulo-ocular reflex activity induced by head movement. Although this hypothesis can be valid in some circumstances, we previously presented evidence that, in fact, these ocular may exist. Here, we address the shortcomings of previous studies describing the possible origins of these ocular tremors and propose solutions to circumvent those shortcomings. © 2013 Movement Disorder Society

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