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. 2020 May 14;11:332. doi: 10.3389/fneur.2020.00332

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Copyright © 2020 Kutz, Kolb, Glasauer and Straka.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Experimental setup and stimulus paradigms. (A) Schematic of human subject on the motion platform with the LED positioned at the level of the eyes; the inset shows the different foot positions at the start of experiment B. (B) Stimulus sequence of experiment A; y-axis indicates ± 6° of platform movement, which resulted in a vertical translation of the head of ± 1.3 cm. Owing to the proximity of the LED, an eye movement amplitude of ± 1.5° is required for complete compensation of the head translation. The numbers above and below the sinusoids indicate stimulus frequency and number of stimulus cycle, respectively. (C) Stimulus sequence of experiment B depicting the 11 cycles of ascending–descending stimulus frequency profile of the platform motion; y-axis is the same as in B.