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Use of a Simulation Model to Investigate the Mechanisms of Sports-related Head Injuries

A simulation model was developed to better understand the mechanisms of brain injuries in sports. A three-dimensional model comprising approximately 1.22 million elements was constructed from cranial computed tomography images of adult male volunteers by the voxel method. To simulate contact sports...

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Autores principales: TAKAO, Hiroyuki, WATANABE, Dai, TANI, Satoshi, OHASHI, Hiroki, ISHIBASHI, Toshihiro, TAKESHITA, Kohei, MURAKAMI, Shigeyuki, NISHIMOTO, Tetsuya, YUGE, Kohei, KARAGIOZOV, Kostadin, ABE, Toshiaki, MURAYAMA, Yuichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Japan Neurosurgical Society 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8754681/
https://www.ncbi.nlm.nih.gov/pubmed/34645717
http://dx.doi.org/10.2176/nmc.oa.2021-0149
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author TAKAO, Hiroyuki
WATANABE, Dai
TANI, Satoshi
OHASHI, Hiroki
ISHIBASHI, Toshihiro
TAKESHITA, Kohei
MURAKAMI, Shigeyuki
NISHIMOTO, Tetsuya
YUGE, Kohei
KARAGIOZOV, Kostadin
ABE, Toshiaki
MURAYAMA, Yuichi
author_facet TAKAO, Hiroyuki
WATANABE, Dai
TANI, Satoshi
OHASHI, Hiroki
ISHIBASHI, Toshihiro
TAKESHITA, Kohei
MURAKAMI, Shigeyuki
NISHIMOTO, Tetsuya
YUGE, Kohei
KARAGIOZOV, Kostadin
ABE, Toshiaki
MURAYAMA, Yuichi
author_sort TAKAO, Hiroyuki
collection PubMed
description A simulation model was developed to better understand the mechanisms of brain injuries in sports. A three-dimensional model comprising approximately 1.22 million elements was constructed from cranial computed tomography images of adult male volunteers by the voxel method. To simulate contact sports that permit actions such as tackling, a sinusoidal wave with duration of 10 ms and maximum acceleration of 2000 m/s(2) was applied to the lowest point of the model to apply rotational acceleration to the head from different directions. The von Mises stress was then observed at five points in the coronal plane of the brain: cingulate gyrus (CG), corpus callosum (CC), brain stem (BS), lateral temporal lobe (LT), and medial temporal lobe (MT). LS-DYNA universal finite element analysis software with explicit time integration was used for the analysis. Concentrations of stress started to appear in the CC and BS at 10 ms post-impact, after which they also became evident in the CG and MT. The maximum changes in stress at each location occurred 10–15 ms post-impact. The von Mises stress was 9–14 kPa in the CG, 8–24 kPa in the CC, 12–24 kPa in the BS, 7–12 kPa in the LT, and 12–18 kPa in the MT. The highest stress in every part of the brain occurred after lateral impact, followed by oblique impact and sagittal impact. Such simulations may help elucidate the mechanisms of brain injuries in sports and help develop measures to prevent chronic traumatic encephalopathy.
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spelling pubmed-87546812022-01-20 Use of a Simulation Model to Investigate the Mechanisms of Sports-related Head Injuries TAKAO, Hiroyuki WATANABE, Dai TANI, Satoshi OHASHI, Hiroki ISHIBASHI, Toshihiro TAKESHITA, Kohei MURAKAMI, Shigeyuki NISHIMOTO, Tetsuya YUGE, Kohei KARAGIOZOV, Kostadin ABE, Toshiaki MURAYAMA, Yuichi Neurol Med Chir (Tokyo) Original Article A simulation model was developed to better understand the mechanisms of brain injuries in sports. A three-dimensional model comprising approximately 1.22 million elements was constructed from cranial computed tomography images of adult male volunteers by the voxel method. To simulate contact sports that permit actions such as tackling, a sinusoidal wave with duration of 10 ms and maximum acceleration of 2000 m/s(2) was applied to the lowest point of the model to apply rotational acceleration to the head from different directions. The von Mises stress was then observed at five points in the coronal plane of the brain: cingulate gyrus (CG), corpus callosum (CC), brain stem (BS), lateral temporal lobe (LT), and medial temporal lobe (MT). LS-DYNA universal finite element analysis software with explicit time integration was used for the analysis. Concentrations of stress started to appear in the CC and BS at 10 ms post-impact, after which they also became evident in the CG and MT. The maximum changes in stress at each location occurred 10–15 ms post-impact. The von Mises stress was 9–14 kPa in the CG, 8–24 kPa in the CC, 12–24 kPa in the BS, 7–12 kPa in the LT, and 12–18 kPa in the MT. The highest stress in every part of the brain occurred after lateral impact, followed by oblique impact and sagittal impact. Such simulations may help elucidate the mechanisms of brain injuries in sports and help develop measures to prevent chronic traumatic encephalopathy. The Japan Neurosurgical Society 2022-01 2021-10-14 /pmc/articles/PMC8754681/ /pubmed/34645717 http://dx.doi.org/10.2176/nmc.oa.2021-0149 Text en © 2022 The Japan Neurosurgical Society https://creativecommons.org/licenses/by-nc-nd/4.0/This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/)
spellingShingle Original Article
TAKAO, Hiroyuki
WATANABE, Dai
TANI, Satoshi
OHASHI, Hiroki
ISHIBASHI, Toshihiro
TAKESHITA, Kohei
MURAKAMI, Shigeyuki
NISHIMOTO, Tetsuya
YUGE, Kohei
KARAGIOZOV, Kostadin
ABE, Toshiaki
MURAYAMA, Yuichi
Use of a Simulation Model to Investigate the Mechanisms of Sports-related Head Injuries
title Use of a Simulation Model to Investigate the Mechanisms of Sports-related Head Injuries
title_full Use of a Simulation Model to Investigate the Mechanisms of Sports-related Head Injuries
title_fullStr Use of a Simulation Model to Investigate the Mechanisms of Sports-related Head Injuries
title_full_unstemmed Use of a Simulation Model to Investigate the Mechanisms of Sports-related Head Injuries
title_short Use of a Simulation Model to Investigate the Mechanisms of Sports-related Head Injuries
title_sort use of a simulation model to investigate the mechanisms of sports-related head injuries
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8754681/
https://www.ncbi.nlm.nih.gov/pubmed/34645717
http://dx.doi.org/10.2176/nmc.oa.2021-0149
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