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. 2023 Oct 14;14:6494. doi: 10.1038/s41467-023-42149-x

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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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Fig. 6 — a Comparison of surface areas of Ag/AgCl electrodes and TPP electrodes. Scale bar: 1 cm. b Photographs of different MEAPs. Scale bar: 1 cm, 5 mm, 1 mm, respectively. c, d Configuration of MEAP on BB and APB at rest and during the contraction task of BB, APB, respectively. In the task, left is rest; right is contraction. e, f sEMG recorded by each channel of MEAPs on BB and APB, respectively. g, h Muscle activity maps of sEMG recorded from BB and APB, showing the process of graded recruitment during contractions. The left column is RMS values from each channel on BB and APB, respectively; the right column is interpolated results of each channel on BB and APB, respectively.