求翻译：熬夜者的交感神经却是在夜晚兴奋，所谓一张一弛，熬夜后的第二天白天，交感神经就难以充分兴奋了。这样人在白天会没有精神，头昏脑涨，记忆力减退，注意力不集中，反应迟钝，健忘以及头晕，头痛等问题。时间长了，还会出现神经衰弱，失眠等问题。是什么意思？

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conjecturing the nerves are in the middle of the night, the so-called alternating tension excited about staying up all night, after the first 2 days of nerves in daytime, it will be difficult to fully excited. In this way during the daytime, and spirit will not head went around declining memory and

The staying up late nerve is actually is excited in the night, so-called alternated tension with relaxation, stays up late the after second day daytime, the nerve with difficulty fully is excited.Such person can not have the spirit in the daytime, to rise muddleheadedly, the memory drops, the attent

Staying up by sympathetic nerves are excited in the night, the so-called fall out of use, after staying up late the next day by day, sympathetic nerves will be difficult to fully excited. So people will have no spirit during the day, Dizzy the brain up, memory loss, attention is not focused, slow re

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