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. 2023 Oct 3;13:16651. doi: 10.1038/s41598-023-43861-w

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© The Author(s) 2023

Open Access This 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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The timing of vibration presentation and the analysis interval of change point. We presented the vibration stimuli 15 and 30 s after the start of the trial in the vibration blocks. RR here is the time interval between the apexes of the pulse wave. RR0 is the RR interval immediately before the vibration, and RR1–4 are the RR intervals of the first, second, third, and fourth times after the vibration, respectively. In the non-vibration trials, which are just before the vibration trials, we defined RR0–4 based on 15 and 30 s after the start of the trial adjusting to the vibration trials. We analyzed change point detection for the RR interval from 5 s before to 10 s after the two vibration presentations in one trial (interval①, ②) and calculated the percentage of change points detected at RR1–3.