近20年来，这位加州大学欧文分校的神经科学家一直在研究犯罪精神病态者的大脑。

For nearly 20 years, the neuroscientist at the University of California-Irvine has studied the brains of psychopaths.

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即使是在患者表现出精神认知障碍这一类症状之前，患者脑部就已近发生了变化，比如脑部的粘性病变或者神经内部的蛋白质无规则缠绕都会在患者表现出症状之前提前发生。

Even before this mild cognitive impairment shows up, brain changes such as a buildup of sticky plaque or protein tangles inside nerves can suggest trouble ahead.

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组间并没有观察到显著区别，但在无传导阻滞症状的病人中，牵涉中位神经元的情况显著较少。近端肌无力也存在这种情况。

Few significant differences were seen between groups, but involvement of the median nerve was significantly less frequent in patients without conduction block. This was also true of proximal weakness.

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