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. 2023 Dec 6;13:21522. doi: 10.1038/s41598-023-48811-0

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© The Author(s) 2023

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

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Relationship in bilateral limb asymmetric between clinical/functional scores and spinally evoked motor potential. (A) Sample analysis of area between curves (ABC) between the right and left muscles for P01 during stimulation below the lesion. (B) ABC of individual data in upper-limb muscles during stimulation above and below the lesion. The dots shifted to the left (negative values) indicate that the left muscle had a greater amplitude than the right muscle, whereas the dots shifted to the right (positive values) indicate that the right muscle had a greater amplitude than the left muscle. (C) Scatter matrix plot with Pearson’s correlation coefficient in left and right limb asymmetry between ISNCSCI ULMS and GRASSP strength scores and motor evoked potentials in UL motor pools during TSS above the lesion (left) and below the lesion (right). TSS transcutaneous spinal stimulation, BIC biceps brachii, TRIC triceps brachii, FCR flexor carpi radialis, ECR extensor carpi radialis, FDI first dorsal interosseous, APB abductor pollicis brevis muscles.