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首页> 外文期刊>Journal of clinical and experimental neuropsychology >Cumulative effects of concussions in athletes revealed by electrophysiological abnormalities on visual working memory.
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Cumulative effects of concussions in athletes revealed by electrophysiological abnormalities on visual working memory.

机译：电生理异常揭示的脑震荡对视觉工作记忆的累积影响。

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Event-related potentials (ERPs) have been useful to detect subtle, pervasive alterations of cognition-related waveforms in athletes with multiple concussions. This study used the sustained posterior contralateral negativity (SPCN) waveform component recorded while participants performed a visual short-term memory task to investigate how working memory (WM) storage capacity was affected among athletes who differed according to their history of sports concussions. Fifty-five university-level football players were assigned to three groups: 1-2 concussion athletes; 3+ concussion athletes; non-concussed athletes. The main finding of the present study was that athletes with a history of three concussions or more exhibited significantly attenuated SPCN amplitude relative to both concussed athletes with only one or two prior concussions and athletes without concussions. The latter finding adds to previous evidence of disproportionately worse outcome in athletes presenting with a history of three or more concussions relative to those with fewer concussions. In addition, SPCN amplitude was found to correlate significantly with a visual memory capacity estimate (K), but this K value did not significantly differ across groups. This suggests that attenuated SPCN amplitude after three or more concussions did not interfere with apparent WM function. Taken together, these findings suggest that the altered neurophysiological index of WM storage might be a more sensitive measure of a latent WM function abnormality which may well worsen with aging, or perhaps additional brain insults.
机译：事件相关电位（ERP）已用于检测具有多个脑震荡的运动员中与认知相关的波形的细微，普遍变化。这项研究使用参与者在执行视觉短期记忆任务时记录的持续后侧对侧负向性（SPCN）波形分量，以调查根据运动脑震荡历史而有所不同的运动员对工作记忆（WM）储存能力的影响。将55名大学级别的足球运动员分为三组：1-2名脑震荡运动员; 3名以上脑震荡运动员;无脑的运动员。本研究的主要发现是，相对于仅有一次或两次脑震荡的脑震荡运动员和没有脑震荡的运动员，具有3次脑震荡历史的运动员的SPCN振幅均显着降低。后一个发现增加了以前的证据，即相对于那些脑震荡较少的人，有三个或三个以上脑震荡病史的运动员的结局会成比例地变差。此外，发现SPCN振幅与视觉记忆容量估计值（K）显着相关，但是该K值在各组之间没有显着差异。这表明在三个或三个以上脑震荡后，SPCN振幅衰减不影响明显的WM功能。综上所述，这些发现表明，WM储存的改变后的神经生理学指标可能是更敏感的WM潜伏性功能异常指标，随着年龄的增长或额外的脑部损伤，WM功能异常可能会进一步恶化。

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