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Questions tagged [sleep]

Sleep is a naturally recurring state characterized by reduced or absent consciousness, relatively suspended sensory activity, and inactivity of nearly all voluntary muscles. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, and is more easily reversible than being in hibernation or a coma.

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87
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2answers
21k views

Does polyphasic sleep work? Does it have long-term or short-term side effects?

Cutting sleep down to 6, or 4, or 2 hours per day sounds fantastic. It also sounds like something that should have evolved naturally if it were possible. From the Polyphasic Society: Humans are ...
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3answers
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Is sleep training a form of neglect or harmful?

Some people claim that "crying it out" is harmful. For example, the article on PhD Parenting states that crying it out is harmful to a child. I've heard others suggest that it's neglectful. I expect ...
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6k views

Can devices detect your sleep cycle and wake you in a more refreshed state?

There are a number of products on the market that claim to be "better alarm clocks" that allows you to feel more refreshed when you wake - even if you sleep a few minutes or tens of minutes less. ...
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1answer
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Did Albert Einstein sleep 10-11 hours daily?

I heard many times that Albert Einstein needed a lot of sleep. For example, this BBC article claims that he typically needed eleven hours of sleep: People's sleep needs can differ significantly. ...
22
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1answer
7k views

Are intelligent people more nocturnal than people not considered intelligent?

Some sites claim that people with higher intelligence tend to go to bed later. For example: People with higher IQs are more apt to be nocturnal night-owls. Those with lower IQs tend to restrict ...
21
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1answer
2k views

Does using the computer before sleeping affect sleep patterns?

According to this Bloomberg Businessweek article using electronics before bed may hamper sleep. Is it true that using a computer, watching T.V. or using some other type of face-to-screen electronics ...
24
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1answer
9k views

How effective is melatonin for aiding with sleep difficulty?

From Wikipedia: Taken 30 to 90 minutes before bedtime, melatonin supplementation acts as a mild hypnotic. It causes melatonin levels in the blood to rise earlier than the brain's own production ...
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4answers
7k views

Do you eat a certain number of spiders whilst you sleep?

Over the course of your life time, the average person eats X spider/insects/whatever whilst they are sleeping. X tends to vary according to who you ask. Is this just an urban legend?
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3answers
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Does the color temperature of a computer screen affect sleep patterns?

There's a little tool called f.lux that claims: During the day, computer screens look good — they're designed to look like the sun. But, at 9PM, 10PM, or 3AM, you probably shouldn't be looking at ...
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3answers
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Were our ancestors segmented sleepers?

Historian A. Roger Ekirch contends that in ancient times, people naturally had two sleeping periods at night- the first starts shortly after sundown and ends in an short break, where people were semi-...
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1answer
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Can anyone function on just 2 hours sleep per night?

This infographic advert describes the sleeping habits of a few well-known people: A few of them were claimed to have gotten by with extremely little sleep. For example: Tesla, 2 hours of sleep per ...
36
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1answer
28k views

Does eating just before sleeping cause nightmares?

In many cartoons and on Sesame Street there are many storylines where a character eats just before going to bed (usually pizza) and they end up having nightmares or very crazy vivid dreams. Normally ...
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1answer
14k views

If you put your hand in water while sleeping/drunk, will you pee yourself?

This is like an urban myth and a classic prank, but I never saw it in action. Supposedly if someone is passed out or sleeping, the contact with water will make him pee. Is this true? If true, why ...
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2answers
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Is it possible to induce a lucid dream?

I've seen some websites like this that guide you to lucid dreaming, but still wondering is this just a myth? I tried to search for Lucid Dream but there seems like no result about people who sharing ...
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0answers
1k views

Is sleepiness after a goods night's sleep a sign of dehydration?

If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up. — Just So You Know (@Know) April 22, 2013 Some quick searching unsurprisingly ...
13
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1answer
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Does sleeping an average of 11 hours or more raise one's risk of brain-related disorders?

I am familiar with the effects of sleep deprivation and some of the harmful effects of oversleeping. However, I have also heard more than once that sleeping more than 10 hours on average, even for a ...
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2answers
889 views

Does reading off a self-luminous tablet impact the quality of sleep?

I've heard claimed many times that reading an iPad in bed makes for worse sleep quality than reading a book or a Kindle with a bedside lamp, Possible explanations I've heard are because of the ...
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2answers
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Does putting a bar of soap under your mattress prevent leg cramps?

I've heard this claim several times from family members, and I was highly skeptical. Supposedly the mere presence of a bar of soap underneath the mattress can ward off leg cramps during the night. ...
13
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1answer
1k views

Is it dangerous to wake a sleepwalker?

Source It seems to be a common belief that you should never wake up a sleepwalker From Wikipedia - Sleepwalking: There are conflicting viewpoints on whether it is harmful to wake a sleepwalker....
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3answers
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Do “blue light therapy” systems help with sleeping disorders?

I've seen blue light therapy systems which just look like a bunch of LED blue lights being sold online and in stores. They claim to help with sleeping disorders and jet lag. How are they supposed to ...
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Is shared dreaming possible?

Mutual dreaming or shared dreaming is the claim that two or more people can share the same dream environment. I have experienced a numerous lucid dreams but I've never met a known person in such ...
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1answer
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Will sleep deprivation kill you faster than starvation?

This article from Time Motto makes the claim that sleep deprivation will result in faster death than starvation. In the long run, work is not more important than sleep. If you aren’t sure how ...
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1answer
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Is it impossible for a human to feel pain in a dream?

I am absolutely sure that humans can feel emotions in a dream. I've experienced some of the strongest anxiety in my life during nightmares. Sometimes the emotions were strong enough to persist in the ...
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Can a hypnosis audiobook induce epileptic seizures?

I noticed a warning on a hypnosis/self-help audiobook that read as follows: Warning: This audiobook contains powerful techniques. Do not listen if you suffer from epilepsy. My inclination is ...