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. 2019 Dec 6;19(3):1109–1130. doi: 10.1007/s10237-019-01273-8

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© The Author(s) 2019

Open AccessThis 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. 3 — Images of a the surface of the head of a 4-week-old pig illustrating ink marks on the brain tissue, b a frame from high-speed video demonstrating ink marks isolated by the MATLAB script and triads (blue lines) and their centroids (red dots) that were used for strain calculation, and c overlapped FEM top surface and hemisection brain image from high-speed video and examples of how the corresponding elements for triad centroids were selected