Immediate and Transient Perturbances in EEG Within Seconds Following Controlled Soccer Head Impact

IF 3 2区 医学 Q3 ENGINEERING, BIOMEDICAL Annals of Biomedical Engineering Pub Date : 2024-08-13 DOI:10.1007/s10439-024-03602-0
Ahmad Rezaei, Timothy Wang, Cyrus Titina, Lyndia Wu
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Abstract

Athletes in contact and collision sports can sustain frequent subconcussive head impacts. Although most impacts exhibit low kinematics around or below 10 g of head linear acceleration, there is growing concern regarding the cumulative effects of repetitive sports head impacts. Even mild impacts can lead to brain deformations as shown through neuroimaging and finite element modeling, and thus may result in mild and transient effects on the brain, prompting further investigations of the biomechanical dose—brain response relationship. Here we report findings from a novel laboratory study with continuous monitoring of brain activity through electroencephalography (EEG) during controlled soccer head impacts. Eight healthy participants performed simulated soccer headers at 2 mild levels (6 g, 4 rad/s and 10 g, 8 rad/s) and three directions (frontal, oblique left, oblique right). Participants were instrumented with an inertial measurement unit (IMU) bite bar and EEG electrodes for synchronized head kinematics and brain activity measurements throughout the experiment. After an impact, EEG exhibited statistically significant elevation of relative and absolute delta power that recovered within two seconds from the impact moment. These changes were statistically significantly higher for 10 g impacts compared with 6 g impacts in some topographical regions, and oblique impacts resulted in contralateral delta power increases. Post-session resting state measurements did not indicate any cumulative effects. Our findings suggest that even mild soccer head impacts could lead to immediate, transient neurophysiological changes. This study paves the way for further dose-response studies to investigate the cumulative effects of mild sports head impacts, with implications for long-term athlete brain health.

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受控足球头部撞击后数秒内脑电图的即时和瞬时扰动。
在接触和碰撞运动中,运动员的头部会经常受到撞击下的撞击。虽然大多数撞击都表现出头部线性加速度在 10 g 左右或以下的低运动学特性,但人们越来越关注重复性运动头部撞击的累积效应。神经影像学和有限元建模显示,即使是轻微的撞击也会导致大脑变形,因此可能会对大脑造成轻微和短暂的影响,这促使人们进一步研究生物力学剂量与大脑反应之间的关系。在此,我们报告了一项新型实验室研究的结果,该研究通过脑电图(EEG)对受控足球头部撞击过程中的大脑活动进行了连续监测。八名健康参与者分别在两个轻度水平(6 克、4 拉德/秒和 10 克、8 拉德/秒)和三个方向(正面、左斜面、右斜面)上进行了模拟足球头部撞击。在整个实验过程中,参与者都使用惯性测量单元(IMU)咬合杆和脑电图电极对头部运动学和大脑活动进行同步测量。撞击发生后,脑电图显示出相对和绝对德尔塔功率的显著上升,并在撞击发生后的两秒钟内恢复。在某些地形区域,与 6 g 的撞击相比,10 g 的撞击导致的这些变化在统计学上明显更高,斜撞击导致对侧的 delta 功率增加。会后静息状态测量结果未显示任何累积效应。我们的研究结果表明,即使是轻微的足球头部撞击也会导致即时、短暂的神经生理学变化。这项研究为进一步开展剂量反应研究以调查轻微运动头部撞击的累积效应铺平了道路,并对运动员的长期大脑健康产生了影响。
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来源期刊
Annals of Biomedical Engineering
Annals of Biomedical Engineering 工程技术-工程:生物医学
CiteScore
7.50
自引率
15.80%
发文量
212
审稿时长
3 months
期刊介绍: Annals of Biomedical Engineering is an official journal of the Biomedical Engineering Society, publishing original articles in the major fields of bioengineering and biomedical engineering. The Annals is an interdisciplinary and international journal with the aim to highlight integrated approaches to the solutions of biological and biomedical problems.
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