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Vision 2018, 2(2), 16; https://doi.org/10.3390/vision2020016

Beyond the Vestibulo-Ocular Reflex: Vestibular Input is Processed Centrally to Achieve Visual Stability

MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge CB2 1TN, UK
Received: 5 February 2018 / Revised: 7 March 2018 / Accepted: 15 March 2018 / Published: 21 March 2018
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Abstract

The current study presents a re-analysis of data from Zink et al. (1998, Electroencephalography and Clinical Neurophysiology, 107), who administered galvanic vestibular stimulation through unipolar direct current. They placed electrodes on each mastoid and applied either right or left anodal stimulation. Ocular torsion and visual tilt were measured under different stimulation intensities. New modelling introduced here demonstrates that directly proportional linear models fit reasonably well with the relationship between vestibular input and visual tilt, but not to that between vestibular input and ocular torsion. Instead, an exponential model characterised by a decreasing slope and an asymptote fitted best. These results demonstrate that in the results presented by Zink et al. (1998), ocular torsion could not completely account for visual tilt. This suggests that vestibular input is processed centrally to stabilise vision when ocular torsion is insufficient. Potential mechanisms and seemingly conflicting literature are discussed. View Full-Text
Keywords: visual stability; galvanic vestibular stimulation; visual tilt; ocular torsion; multi-sensory integration visual stability; galvanic vestibular stimulation; visual tilt; ocular torsion; multi-sensory integration
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Dalmaijer, E.S. Beyond the Vestibulo-Ocular Reflex: Vestibular Input is Processed Centrally to Achieve Visual Stability. Vision 2018, 2, 16.

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