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. 2018 Oct 4;8:14821. doi: 10.1038/s41598-018-33012-x

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© The Author(s) 2018

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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Example H-reflex recordings from the FCR muscle. Each panel shows an unconditioned H-reflex (black), and an H-reflex conditioned by preceding stimulation of the ECR muscle (red). Results are shown for a single healthy subject (A,B) patient with stroke (C,D Ashworth score 2) and spinal cord injury (E,F Ashworth score 0). Left panels (A,C,E) used a conditioning interval of 30 ms, which generates facilitation in healthy subjects; right panels (B,D,F) used an interval of 70 ms, at which the reflex is suppressed in healthy subjects.