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Published in: Acta Neurologica Belgica 1/2018

01-03-2018 | Original Article

Is perception of visual verticality intact in patients with idiopathic cervical dystonia?

Authors: Joke De Pauw, Willem De Hertogh, Rudy Mercelis, Wim Saeys, Ann Hallemans, Sarah Michiels, Steven Truijen, Patrick Cras

Published in: Acta Neurologica Belgica | Issue 1/2018

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Abstract

Idiopathic cervical dystonia (CD) is a focal dystonia characterized by an abnormal tilted or twisted head position. This abnormal head position could lead to a distorted perception of the visual vertical and spatial orientation. The aim of this cross-sectional study was to investigate whether the perception of the visual vertical is impaired in patients with CD. The subjective visual vertical test (SVV) was measured in 24 patients with CD and 30 controls. The SVV test is conducted in a completely darkened room. A laser bar is projected on an opposing white wall, which is deviated from the earth’s gravitational vertical. Participants were seated with their head unrestrained and were instructed to position this bar vertically. The deviations in degrees (°) are corrected for the side of laterocollis in order to measure the E-effect. We found that patients were able to position the laser bar as equally close to the earth’s gravitational vertical as controls (+ 0.67° SD ± 2.12 vs + 0.29° SD ± 1.08, p = 0.43). No E-effect was measured. Notwithstanding the abnormal position of the head, the perception of the visual vertical in patients with idiopathic CD is intact, possibly because of central neural compensatory mechanisms.
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Metadata
Title
Is perception of visual verticality intact in patients with idiopathic cervical dystonia?
Authors
Joke De Pauw
Willem De Hertogh
Rudy Mercelis
Wim Saeys
Ann Hallemans
Sarah Michiels
Steven Truijen
Patrick Cras
Publication date
01-03-2018
Publisher
Springer International Publishing
Published in
Acta Neurologica Belgica / Issue 1/2018
Print ISSN: 0300-9009
Electronic ISSN: 2240-2993
DOI
https://doi.org/10.1007/s13760-017-0853-0

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Acknowledgements to Referees

Acknowledgement to referees 2017