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. 2018 Mar 20;19(1):26. doi: 10.1186/s10194-018-0851-5

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 1 — EMG changes relative to rest blocks in the electrode over the right neck muscle for the three individual groups and each experimental condition. The errorbars represent standard deviations. The asterisk marks a significant group difference (p < 0.05)