Brain tissue strains vary with head impact location: A possible explanation for increased concussion risk in struck versus striking football players
Brain tissue strains vary with head impact location: A possible explanation for increased concussion risk in struck versus striking football players
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DOI：
10.1016/j.clinbiomech.2018.03.021
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发表时间：
2019-04-01
影响因子：
1.8
通讯作者：
Siegmund, Gunter P.
中科院分区：
文献类型：
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作者：
Elkin, Benjamin S.;Gabler, Lee F.;Siegmund, Gunter P.
背景：在球场上的橄榄球头盔的影响，在很大范围内的严重程度已造成脑震荡，在一些球员，但不是在其他球员。这种变化的一个可能的解释是打击球员的头盔的影响location.Methods：我们研究了影响区域脑组织应变的位置时，输入能量保持不变的效果。实验室的影响进行了12个位置分布在头盔和由此产生的头部运动学模拟在两个有限元模型的大脑：模拟损伤监视器和全球人体模型联盟的大脑model.Findings：峰值运动学，损伤指标和脑应变变化显着的影响位置。撞击位置的差异解释了整个大脑和大脑的脑应变总方差的33%至37%，远高于撞击位置解释的峰值合成头部运动学方差（8%至23%），略高于闭合速度差异解释的方差的一半（57%至61%）。这两个有限元模型产生了类似的应变结果，产生多轴旋转的影响，脑干应变的一些影响的位置和一个小的偏差cerebellum.Interpretation：基于这个实验和计算模拟研究，影响足球头盔的位置有很大的影响区域脑组织应变的变化较小。我们还发现，最低的应变始终发生在头部和前额的冲击，头盔的位置通常与罢工的球员。
Background: On-field football helmet impacts over a large range of severities have caused concussions in some players but not in other players. One possible explanation for this variability is the struck player's helmet impact location.Methods: We examined the effect of impact location on regional brain tissue strain when input energy was held constant. Laboratory impacts were performed at 12 locations distributed over the helmet and the resulting head kinematics were simulated in two finite element models of the brain: the Simulated Injury Monitor and the Global Human Body Model Consortium brain model.Findings: Peak kinematics, injury metrics and brain strain varied significantly with impact location. Differences in impact location explained 33 to 37% of the total variance in brain strain for the whole brain and cerebrum, considerably more than the variance explained by impact location for the peak resultant head kinematics (8 to 23%) and slightly more than half of the variance explained by the difference in closing speed (57 to 61%). Both finite element models generated similar strain results, with minor variations for impacts that generated multiaxial rotations, larger variations in brainstem strains for some impact locations and a small bias for the cerebellum.Interpretation: Based on this experimental and computational simulation study, impact location on the football helmet has a large effect on regional brain tissue strain. We also found that the lowest strains consistently occurred in impacts to the crown and forehead, helmet locations commonly associated with the striking player.