失神发作——也称小发作——是一种短暂的、突然的意识丧失。
Absence seizure - also known as petit mal - involves a brief, sudden lapse of consciousness.
可能出现一些短暂性症状，比如意识或知觉丧失，以及运动、感觉(包括视觉、听觉和味觉)、情绪或者精神功能方面的紊乱。
Temporary symptoms can occur, such as loss of awareness or consciousness, and disturbances of movement, sensation (including vision, hearing and taste), mood or mental function.
实验室的试验已经证实，缺少睡眠的大脑很容易进入“短暂的昏睡”——阵发性的意识丧失，这种意识丧失的时间短得甚至连当事人都可能意识不到。
Laboratory experiments have confirmed that the sleep-deprived mind is prone to "microsleeps" - lapses of consciousness so brief that the subject may not even be aware of them.
病人直到断气之前很长一段时间几乎都是保持清醒的，只有在长时间神志清晰的情况下间断性地短暂失去意识。最后丧失知觉陷入昏迷和休克，直至死亡。
The patient remains conscious almost to the end, with only brief intervals of unconsciousness occurring between long lucid periods before lapsing into a coma followed by death.
病人直到断气之前很长一段时间几乎都是保持清醒的，只有在长时间神志清晰的情况下间断性地短暂失去意识。最后丧失知觉陷入昏迷和休克，直至死亡。
The patient remains conscious almost to the end, with only brief intervals of unconsciousness occurring between long lucid periods before lapsing into a coma followed by death.
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