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. 2019 Sep 11;9:13086. doi: 10.1038/s41598-019-49503-4

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© The Author(s) 2019

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Depiction of (a) the obstacle course, (b) a participant with full experimental equipment, and (c) the elements of the obstacle course. (a) The obstacle course had a circumference of 75 m and consisted of two stairs, two balancing beams and two coordination boards. Participants had to climb and descend the stairs, balance over the beams without touching the adjacent ground and complete the coordination boards by placing their feet in the hole cut-outs without touching the surrounding surface. (b) The participant wore a 30-electrode cap, which was connected to a mobile amplifier placed in a pocket at the back of the head. In the backpack a raspberry Pi was stored which generated auditory stimuli and trigger signals. Triggers were transferred into digital signals via a Trigger extension box which then was connected to the amplifier. The participant held a handle with a reaction button in the right hand. By pressing the button with the right thumb, response triggers were inserted into the EEG-signal via the Trigger extension. EEG-data was stored offline on an SD-card inside the amplifier. (c) The staircases were 0.58 m high, had a length of 3.2 m/4.1 m, and a width of 1,2 m. Balancing beams were 0.06 m high and approximately 7,30 m long with angles between the planks reaching from 130° to 150°. The coordination boards were 7.5 m long with a height of 0.08 m. Hole cut-outs were 0.4 m by 0.4 m with 0.05 m up to 0.3 m of space in-between.