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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part H. Journal of Engineering in Medicine >Concussion and the severity of head impacts in mixed martial arts
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Concussion and the severity of head impacts in mixed martial arts

机译：混合武术头部影响的脑震荡和严重程度

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Concern about the consequences of head impacts in US football has motivated researchers to investigate and develop instrumentation to measure the severity of these impacts. However, the severity of head impacts in unhelmeted sports is largely unknown as miniaturised sensor technology has only recently made it possible to measure these impacts in vivo. The objective of this study was to measure the linear and angular head accelerations in impacts in mixed martial arts, and correlate these with concussive injuries. Thirteen mixed martial arts fighters were fitted with the Stanford instrumented mouthguard (MiG2.0) participated in this study. The mouthguard recorded linear acceleration and angular velocity in 6 degrees of freedom. Angular acceleration was calculated by differentiation. All events were video recorded, time stamped and reported impacts confirmed. A total of 451 verified head impacts above 10g were recorded during 19 sparring events (n = 298) and 11 competitive events (n = 153). The average resultant linear acceleration was 38.0624.3g while the average resultant angular acceleration was 256761739 rad/s2. The competitive bouts resulted in five concussions being diagnosed by a medical doctor. The average resultant acceleration (of the impact with the highest angular acceleration) in these bouts was 86.7618.7g and 756163438 rad/s2. The average maximum Head Impact Power was 20.6kW in the case of concussion and 7.15kW for the uninjured athletes. In conclusion, the study recorded novel data for sub-concussive and concussive impacts. Events that resulted in a concussion had an average maximum angular acceleration that was 24.7% higher and an average maximum Head Impact Power that was 189% higher than events where there was no injury. The findings are significant in understanding the human tolerance to short-duration, high linear and angular accelerations.
机译：对美国足球中头部撞击后果的担忧促使研究人员调查并开发仪器，以测量这些撞击的严重程度。然而，由于微型传感器技术直到最近才使在体内测量这些影响成为可能，因此在无头盔运动中头部撞击的严重程度在很大程度上尚不清楚。本研究的目的是测量混合武术冲击中头部的线性和角度加速度，并将其与震荡损伤相关联。13名混血武术运动员被安装斯坦福仪器护齿器（MiG2.0）参与了这项研究。护齿器记录了6个自由度的线加速度和角速度。用微分法计算角加速度。所有事件都被录像、时间戳和报告的影响得到确认。在19场拳击比赛（n=298）和11场比赛（n=153）中，总共记录了451次10g以上的验证头部撞击。平均合成线加速度为38.0624.3g，平均合成角加速度为256761739 rad/s2。比赛中，医生诊断出五例脑震荡。在这些回合中（具有最高角加速度的碰撞）的平均合成加速度为86.7618.7g和756163438 rad/s2。脑震荡时的平均最大头部冲击功率为20.6kW，未受伤运动员的平均最大头部冲击功率为7.15kW。总之，这项研究记录了次冲击和冲击冲击冲击的新数据。导致脑震荡的事件的平均最大角加速度比没有受伤的事件高24.7%，平均最大头部撞击力比没有受伤的事件高189%。这些发现对于理解人类对短时、高线性和角加速度的耐受性具有重要意义。

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