Effect of Repetitive Sub-concussive Head Impacts on Ocular Near Point of Convergence
Effect of Repetitive Sub-concussive Head Impacts on Ocular Near Point of Convergence
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DOI：
10.1055/s-0035-1569290
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发表时间：
2016-05-01
影响因子：
2.5
通讯作者：
Jeka, J. J.
中科院分区：
文献类型：
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作者：
Kawata, K.;Tierney, R.;Jeka, J. J.
本研究旨在探讨重复性亚震荡头部撞击对眼睛近会聚点（NPC）的影响。20名健康的年轻成年足球运动员被分配到头球组或对照组。头球被试以11.2 m/s的速度完成10个足球头球。对照组受试者不执行标题。用三轴加速度计测量线性头部加速度。在抽穗前、抽穗后0 h和抽穗后24 h进行NPC评估。在NPC评估过程中，参与者坐着，视觉目标以1 cm/sec的速度向眼睛移动。参与者在他/她经历复视或观察眼睛偏斜时发出信号，并记录距离。评估重复两次，平均NPC评分用于进一步分析。足球头诱导的平均组头部加速度为14.49 +/- 5.4 g。轻微的头部撞击导致NPC距离增加，这得到了显著的组x时间交互作用的支持。在标题组中，与基线相比，标题后0小时和标题后24小时NPC评分显著下降。相反，对照组的NPC评分随着时间的推移没有差异。我们的研究结果表明，轻微的额部头部撞击affekt NPC的至少24小时后标题，这表明，眼的过程被打乱，至少是短暂的，重复的轻微头部撞击。
This study intended to examine effects of repetitive sub-concussive head impacts on ocular near point of convergence (NPC). 20 healthy young adult soccer players were assigned to either a heading or control group. Heading subjects completed 10 headers of soccer balls projected at a speed of 11.2 m/s. Control subjects did not perform heading. Linear head acceleration was measured with a triaxial accelerometer. The NPC assessment was performed at pre-, 0h post-, and 24h post-heading. During the NPC assessment participants were seated and a visual target was moved towards the eyes at 1cm/sec. The participant signaled when he/she experienced diplopia or deviation of the eye was observed, and the distance was recorded. The assessment was repeated twice and average NPC scores were used for further analysis. Soccer heading induced mean group head accelerations of 14.49 +/- 5.4 g. Mild head impacts led to an increased NPC distance, which was supported by a significant Group x Time interaction. In the heading group, 0h post- and 24h post-heading NPC scores were significantly receded compared to baseline. Conversely, NPC scores for the control group showed no difference over time. Our findings indicate that mild frontal head impacts affekt NPC for a minimum of 24h-post heading, suggesting that oculomotor processes are disrupted, at least transiently, by repetitive mild head impact.