外科医生经常会在病人清醒的时候用电流刺激肿瘤周围的脑组织，观察病人的反应以避免切除那些没有坏死的部分。

Surgeons often electrically stimulate the area around the tumor while the patient is awake and can provide feeback, so they can avoid damaging critical tissue.

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他们要求被测试者在清醒的状态下，先根据屏幕上出现的颜色，做出迅速反应，按压相应的颜色按钮。

While awake; Subjects were first asked to touch a series of coloured buttons when prompted by the screen.

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每天早晨8点以后的两个小时里，志愿者们要做为时30分钟的神经行为测试以检测其精神警觉性和清醒程度，其中包括10分钟的精神警惕性实验（检测注意力和反应时间）。

They included a 10-minute "Psychomotor Vigilance Test" that monitors attentiveness and reaction times.

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