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. 2017 May 19;7:2192. doi: 10.1038/s41598-017-02406-8

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© The Author(s) 2017

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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Reconstructed currents after stimulation of the right median nerve at the elbow. (a) Reconstructed current map. The currents flowed into the spinal canal from the right side and propagated cranially 5.6–6.4 ms post-stimulus. Rotated currents were observed 6.6–7.6 ms post-stimulus. Trailing currents propagated cranially 7.8–8.4 ms post-stimulus. (b) Reconstructed currents at the midline of the cervical spinal canal (C3 to C7) and at the adjacent intervertebral foramina (C3/4 to Th1/2). The first peak of the reconstructed currents at the midline of the cervical spinal canal did not propagate, but subsequent currents did (left graphs). Currents flowing into the intervertebral foramina were larger at C5/6 to C7/Th1 (right graphs).