In the study, scientists used two groups of mice, one healthy and the other genetically modified to develop Alzheimer 's-like symptoms, including memory loss.

在研究中，科学家们将小白鼠分成两组，一组是健康的对照组而另一组则通过转基因技术使其呈现阿尔茨海默氏症患者的症状，包括记忆力丧失。

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Since the crash, Bethany has suffered numerous problems, including memory loss, balance problems and seizures.

BBC: Bethany Probert

The filing cites recent scientific studies that have found a connection between concussions and chronic traumatic encephalopathy, a neurodegenerative disease that results in Alzheimer's-like symptoms, including memory loss and mood swings.

CNN: More players file concussion lawsuits against the NFL