Tuesday, February 26, 2013

Why Aren't You Supposed to Wake a Sleepwalker?

  

Reader Gabrielle wrote in to ask: “Why can't we wake a sleepwalker? Is it a can't do, or a shouldn't do?”

Despite urban legends claiming that waking a sleepwalker will send them into shock or give them a heart attack, it’s pretty much harmless. While you can wake them up, you probably shouldn’t, and that’s for both your benefit.

Waking a sleepwalker has never been shown to cause them any harm, but there’s plenty of potential for the person doing the waking to get hurt. Sleepwalking usually occurs during Stage 3 non-rapid eye movement sleep, also known as slow wave sleep, and this stage of sleep is very deep. While waking straight from stage 3 is difficult, it can be done—but doing so can leave a person in a state of cognitive impairment (sleep scientists call it sleep inertia) for around 30 minutes.

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