Alsalaheen Bara, Stockdale Kayla, Pechumer Dana, Giessing Alexander, He Xuming, Broglio Steven P
Department of Physical Therapy, University of Michigan-Flint, Flint, Michigan.
Department of Neurology, University of Michigan, Ann Arbor, Michigan.
Sports Health. 2017 Jul/Aug;9(4):324-332. doi: 10.1177/1941738117713974.
It is unclear whether individuals with a history of single or multiple clinically recovered concussions exhibit worse cognitive performance on baseline testing compared with individuals with no concussion history.
To analyze the effects of concussion history on baseline neurocognitive performance using a computerized neurocognitive test.
PubMed, CINAHL, and psycINFO were searched in November 2015. The search was supplemented by a hand search of references.
Studies were included if participants completed the Immediate Post-concussion Assessment and Cognitive Test (ImPACT) at baseline (ie, preseason) and if performance was stratified by previous history of single or multiple concussions.
Systematic review and meta-analysis.
Level 2.
Sample size, demographic characteristics of participants, as well as performance of participants on verbal memory, visual memory, visual-motor processing speed, and reaction time were extracted from each study.
A random-effects pooled meta-analysis revealed that, with the exception of worsened visual memory for those with 1 previous concussion (Hedges g = 0.10), no differences were observed between participants with 1 or multiple concussions compared with participants without previous concussions.
With the exception of decreased visual memory based on history of 1 concussion, history of 1 or multiple concussions was not associated with worse baseline cognitive performance.
与无脑震荡病史的个体相比，有单次或多次临床康复脑震荡病史的个体在基线测试中是否表现出更差的认知能力尚不清楚。
使用计算机化神经认知测试分析脑震荡病史对基线神经认知表现的影响。
2015年11月检索了PubMed、CINAHL和psycINFO。通过手工检索参考文献对搜索进行补充。
如果参与者在基线（即季前赛）时完成了脑震荡后即刻评估和认知测试（ImPACT），并且其表现按单次或多次脑震荡的既往史进行分层，则纳入研究。
系统评价和荟萃分析。
2级。
从每项研究中提取样本量、参与者的人口统计学特征，以及参与者在言语记忆、视觉记忆、视觉运动处理速度和反应时间方面的表现。
一项随机效应合并荟萃分析显示，除了既往有1次脑震荡的参与者视觉记忆变差（Hedges g = 0.10）外，有1次或多次脑震荡的参与者与无既往脑震荡的参与者之间未观察到差异。
除了基于1次脑震荡病史的视觉记忆下降外，1次或多次脑震荡病史与更差的基线认知表现无关。
