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Resting in darkness improves downbeat nystagmus: evidence from an observational study

  • Resting in an upright position during daytime decreases downbeat nystagmus (DBN). When measured in brightness only, that is, without intermitting exposure to darkness, it does not make a significant difference whether patients have previously rested in brightness or in darkness. In real-world scenarios, people are often exposed to brightness and darkness intermittently. The aim of this study was to analyze whether resting in brightness or resting in darkness was associated with a lower post-resting DBN after intermitting exposures to brightness and darkness. Eight patients were recorded with three-dimensional video-oculography in brightness and darkness conditions, each following two 2-h resting intervals under either brightness or darkness resting conditions. The dependent variable was DBN intensity, measured in mean slow phase velocity. A repeated measures ANOVA with the factors measurement condition (brightness vs. darkness), resting condition (brightness vs. darkness), and time (after first vs. second resting interval) showed aResting in an upright position during daytime decreases downbeat nystagmus (DBN). When measured in brightness only, that is, without intermitting exposure to darkness, it does not make a significant difference whether patients have previously rested in brightness or in darkness. In real-world scenarios, people are often exposed to brightness and darkness intermittently. The aim of this study was to analyze whether resting in brightness or resting in darkness was associated with a lower post-resting DBN after intermitting exposures to brightness and darkness. Eight patients were recorded with three-dimensional video-oculography in brightness and darkness conditions, each following two 2-h resting intervals under either brightness or darkness resting conditions. The dependent variable was DBN intensity, measured in mean slow phase velocity. A repeated measures ANOVA with the factors measurement condition (brightness vs. darkness), resting condition (brightness vs. darkness), and time (after first vs. second resting interval) showed a significant effect for the factor resting condition, where previous resting in darkness was associated with a significantly lower DBN relative to previous resting in brightness (P < 0.01). The clinical relevance is to advise patients with DBN to rest in darkness.show moreshow less

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Author: Rainer Spiegel, Jens Claassen, Julian Teufel, Stanislav Bardins, Erich Schneider, Nicole Lehrer, Klaus Jahn, Fábio Anciaes da Silva, Ales Hahn, Parvis Farahmand, Thomas Brandt, Michael Strupp, Roger Kalla
DOI:https://doi.org/10.1111/nyas.13172
ISSN:1749-6632
ISSN:0077-8923
Title of the source (English):Annals of the New York Academy of Sciences
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2016
Tag:downbeat nystagmus; oscillopsia; resting; symptom relief; video-oculographic measurement (VOG)
Volume/Year:1375
Issue number:1
First Page:66
Last Page:73
Way of publication:Open Access
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / Institut für Medizintechnologie
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