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. 2021 Oct 22;11:20881. doi: 10.1038/s41598-021-99846-0

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© The Author(s) 2021

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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Calculating gaze density relative to nth foothold. The gaze density around upcoming footholds is the integral of the gaze density within 0.3 leg lengths of the origin in each foothold-centered reference frame (Bottom panels, numbered 0–6). The summary panel (Top) shows the gaze densities as a function of foothold and thus provides a relative measure of the gaze allocated to that foothold during walking in a particular condition.