Galvanic Vestibular Stimulation Induces a Spatial Bias in Whole-body Position Estimates
Roberts, R. E.
Riyaz, Mohammed U.
Bronstein, Adolfo M.
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AbstractPeripheral galvanic vestibular stimulation (GVS) has been shown to temporarily ameliorate left spatial neglect [ 1 ]. Specifically, anodal (facilitatory) stimulation over the left mastoid bone coupled with cathodal (inhibitory) over the right mastoid reduces visuospatial-neglect scores in line cancellation [ 2 ] and line bisection tasks [ 3 , 4 ]. This montage increases activity in the left vestibular nerve and suppresses activity in the right [ 5 ], which has been shown to focally activate vestibular networks that occupy visuospatial attention mechanisms, primarily in the non-dominant hemisphere [ 5 ]. Thus, it appears that electrical stimulation of the peripheral vestibular system can shift visuospatial attention to the left side of space [ 4 ]. However, whether such a shift of spatial attention in normal subjects can influence perception of spatial position during whole-body spatial translations is unknown. We hypothesized that shifting attention to the left would result in participants underestimating spatial position estimates during rightward whole-body translations and overestimating spatial position estimates during leftward whole-body translations.
CitationPatel, M., Roberts, R. Edward, Arshad, Qadeer, Ahmed, Maroof, Riyaz, Mohammed U. and Bronstein, Adolfo M. (2015) Galvanic Vestibular Stimulation Induces a Spatial Bias in Whole-body Position Estimates. Brain Stimulation. 8 (5), pp. 981-983.
DescriptionThis is an accepted manuscript of an article published by Elsevier in Brain Stimulation on 23/07/2015, available online: https://doi.org/10.1016/j.brs.2015.07.030 The accepted version of the publication may differ from the final published version.
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by-nc-nd/4.0/