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. 2019 Feb 13;9:1981. doi: 10.1038/s41598-018-38096-z

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© The Author(s) 2019

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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Histological Results. (A) Well-demarcated partition between the fascial layer and AMI. This representative slice captures a healthy collagen-bound nerve entering the muscle layer and reinnervating the muscle. (Trichrome stain). (B) The fibrotic capsule surrounding the upper layer of the AMI, through which new vessels formed, is comprised of loose, anisotropically oriented collagen. (Trichrome stain). (C) Well-epithelialized angiogenic vessels through scar bed facilitate revascularization. Surrounding musculature appears healthy and mature. (H&E stain). (D) A spindle fiber (circled) is shown containing numerous intrafusal fibers between motor unit groups (s46 stain).