Abstract：
Most individuals recover quickly from a concussion; however, youth who sustain multiple concussions may be at risk for long-term cognitive impairments. This case study examines the neuropsychological performance of a 13-year-old malewith five head injuries. After his first concussion during study participation (fourth injury overall), several improvements were observed, likely due to practice effects, yet after sustaining another concussion <2 years later,declines were observed in visuoconstruction, verbal memory, and intellectual functioning. Across serial re-evaluation, his vocabulary knowledge declined, and fewer improvements were observed than anticipated when accounting for serial practice effects, highlighting the possible cumulative impact of multiple concussions.
摘要：
大多数人从脑震荡中迅速康复；然而，患有多次脑震荡的青少年可能有长期认知障碍的风险.此案例研究检查了一名13岁头部受伤的男性的神经心理学表现。在他参与研究期间的第一次脑震荡(总体上是第四次受伤)后，观察到一些改进，可能是由于实践效果，然而，在经历了两年后的另一次脑震荡之后，观察到视觉结构的下降，口头记忆,和智力功能。在系列重新评估中，他的词汇知识下降了，在考虑系列实践效应时，观察到的改进比预期的要少，强调多次脑震荡可能的累积影响。
