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. 2019 Dec 6;9:18520. doi: 10.1038/s41598-019-55004-1

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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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Grand averaged time-frequency spectrograms collapsed across group and conditions. Frequency (Hz) is shown on the y-axis and time (s) is denoted on the x-axis, with 0 ms defined as stimulation onset. The event-related spectral changes after the stimulation are expressed as percent difference from baseline (−200 to 0 ms). The MEG gradiometer with the greatest response amplitude was located near the medial sensorimotor cortices, contralateral to the ankle used during the task. There was a strong event related synchronization (ERS) in the alpha-beta (8–30 Hz, 0 to 125 ms) and gamma (38–80 Hz, 0 to 100 ms) bands for both the passive and active conditions. Additionally, there was an event related desynchronization (ERD) in the beta (18–26 Hz, 300 to 400 ms). The color scale bar is shown on the right.