ELi5: Do you get the same benefits from sleep if you’ve had a nightmare?
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I’m no neuroscientist and I think sleep is one of those things we haven’t completely figured out yet, but: It depends. If someone has severe or frequent nightmares, it does disrupt the benefits you get from sleep enough to cause physiological and cognitive problems. However, a few nightmares doesn’t disrupt those benefits enough to be concerned. Sleep is measured by quality and length. And you need a good amount of both in a certain timespan to be healthy.
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