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. 2020 May 22;267(Suppl 1):231–240. doi: 10.1007/s00415-020-09805-4

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — The dependency of anxiety and postural responses on absolute height above ground as studied using virtual reality technology. Left panel: exemplary view of the virtual scene at 40 m above ground. Subjects were exposed to virtual heights ranging from 0 to 100 m via a head-mounted display. Right panel: anxiety ratings (gray solid line: non-acrophobic individuals; gray dotted line: acrophobic individuals) initially increase with increasing height above ground but saturate for heights above 40 m in non-acrophobic and heights above 70 m in acrophobic individuals. In contrast, bodily responses, e.g. muscle co-contraction (pink solid line) saturates already for heights above 20 m in both acrophobic and non-acrophobic individuals