Motion Sickness Sensitivity Modifies the Cortical Neurodynamics of Postural Control in the Virtual Reality BioVRSea Paradigm

Motion sickness influences postural control in virtual reality environments, but its impact on cortical neurodynamics remains unclear. This study investigated the association between postural sway-measured via center of pressure excursion-and regional power spectral density changes in participants with varying motion sickness sensitivity during the RioVRSea paradigm. Linear mixed-effects models revealed significant associations between center of pressure excursion and power spectral density in the left temporal lobe in <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\theta$</tex> and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\beta$</tex> bands. Moreover, moderation analysis demonstrated that motion sickness sensitivity modified this relationship in the left temporal <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\beta$</tex> band. These findings highlight the role of motion sickness in modifying the cortical neurodynamics of postural control in dynamic virtual reality environments.