8 votes
Accepted

Can you catch up on sleep over the weekend?

Well, to be able to answer your question affirmatively, we'd have to know all the effects of sleep deprivation, including the long term ones, and those are still are not fully accounted for. However I ...
the gods from engineering's user avatar
7 votes
Accepted

What is the cause of frequent nightmares?

Nightmares can be defined as (Pagel, 2000): ...vivid and terrifying nocturnal episodes in which the dreamer is abruptly awakened from sleep. Typically, the dreamer wakes from REM sleep and is able ...
AliceD's user avatar
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7 votes
Accepted

How can someone asleep recognize a very brief sound?

Short answer The auditory system remains active during sleep. Background Filtering of sensory input during sleep is a recognized phenomenon and indeed the senses are typically lulled during sleep. ...
AliceD's user avatar
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7 votes

Does our consciousness die when we go to sleep or fall into a coma?

Q: Does our consciousness die when we go to sleep or fall into a coma? A: No, neuroscientifically speaking, the consciousness does not die when we are sleeping or are in a coma; it is just in a sleep ...
user287279's user avatar
  • 1,825
6 votes

Is it possible to become addicted to sleep deprivation?

Possibly of interest: 2011 study from Berkeley, published in the Journal of Neuroscience: Pulling an all-nighter can bring on euphoria and risky behavior: https://news.berkeley.edu/2011/03/22/pulling-...
Claire Gilmore's user avatar
6 votes
Accepted

Is mindfulness meditation an effective method to fall asleep?

**Is there any empirical evidence meditation is good for sleep? ** Yes. There is. But it definitely depends on the type of meditation. Some types of meditation increase alertness. A few articles I ...
Reed Rawlings's user avatar
6 votes
Accepted

Death from sleep deprivation, what physical mechanism is failing that makes one not to be alive anymore?

As far as I know REM is just brain running a simulation During sleep hormones and neurotransmitters shift in their quantities available along the phases of sleep: slow wave sleep, intermediate ...
Keno's user avatar
  • 597
5 votes

Do neurons fire at a faster rate during dreaming?

In REM sleep, the EEG is remarkably similar to that of the awake state (Purves et al., 2001). Although the EEG represents the synchronized activity of many neurons in the cortex, it does give us a ...
AliceD's user avatar
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5 votes
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Can you Counteract the Negative Effects of Sleep Deprivation?

Nutrients have little to do with it*, it's the rest cycles that are important. Cells are messy, stumbling, statistically functional things. Periodically, a cell needs to take a break so it can ...
Keegan Keplinger's user avatar
5 votes
Accepted

Is it counter-productive to study while tired?

Yes. When studying sleep is crucial in consolidating memories. Recently a wave of research and opinion has hit around optimizing learning, sleep is always mentioned as key. To prominent authors are ...
Reed Rawlings's user avatar
5 votes
Accepted

Sleep vs. Trance

Wearing those big headphone is indirectly a way to isolate yourself from the surrounding sound. That is usually a prelude for relaxation, or meditation. (In people with audiotory disorder, or with ...
yagmoth555's user avatar
4 votes

Can split-brain patients sleep like whales?

Short answer An animal study did not reveal any effects on the synchronization of the cerebral hemispheres after callosotomy, as based on EEG recordings. When one hemisphere showed sleep patterns on ...
AliceD's user avatar
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4 votes
Accepted

Do animals that sleep during the day have a different sleep architecture than those who sleep at night?

One study (Zhao et. al., 2010), investigating the sleep architecture of two bat species (one nocturnal, and one mixed), notes the following: C. sphinx was found to sleep predominantly throughout ...
Justas's user avatar
  • 1,537
4 votes

Is our sense of smell heightened when we are asleep?

Short answer The sense of smell may still be operational during sleep, but it is not enhanced. Olfactory stimuli typically will not wake you up during sleep, however. Background Olfaction and sleep ...
AliceD's user avatar
  • 20.6k
4 votes

Does night-sleep-deprivation have any effect on cognitive performance?

According to this article, yes it does have various symptoms including cognitive deficiencies that make us more prone to errors and less efficient : Circadian rhythms biologically program us to ...
DesignerAnalyst's user avatar
4 votes

Can we interconnect with other people mentally during dreaming?

Short answer Telepathy is pseudoscience. Background I think you are referring to the phenomenon of telepathy, which can be defined as [T]he purported transmission of information from one person ...
AliceD's user avatar
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4 votes
Accepted

Difference between drowsiness/sedation and sleepiness

Sedation This is a forced state of drowsiness or sleep and as indicated in your Ipnos link, it will not necessarily help with drowsiness or sleepiness brought about due to problems with your ...
Chris Rogers's user avatar
  • 12.2k
4 votes

Can dreams predict the future?

Short answer Dreams cannot predict the future. Background Likely you are referring to Deja reve ('already dreamed'), which has been hypothesized to be (Schredi et al., 2017): ...the distinct ...
AliceD's user avatar
  • 20.6k
4 votes

Is there any scientific data showing one can learn while sleeping?

I don't think that it is possible to learn new facts while sleeping, but it is certainly possible to reactivate certain memories during sleep and thereby affect the probability of those memories being ...
Angela Pretorius's user avatar
3 votes

Understanding Melatonin

There is an entry in the Encyclopædia Britannica on Melatonin which gives a run-down on how melatonin is produced and it's use within sleep, regulating reproductive hormones, and helping the immune ...
Chris Rogers's user avatar
  • 12.2k
3 votes

Can time be slowed in a lucid dream?

I'd say yes, in german literature there are some reportings of athelets "training" in slow motion while they are lucid dreaming. I'll try to recap those reportings in english. Paul Tholey &...
Phonolog's user avatar
  • 161
3 votes
Accepted

How many times on average do people wake up per night?

Based on this paragraph from the Wikipedia article on hypnograms On a hypnogram, a sleep cycle is usually around 90 minutes and there are four to six cycles of REM/NREM stages that occur during a ...
maia's user avatar
  • 234
3 votes

Why do we talk unconsciously while sleeping

Brief periods of sleep-talking (somniloquy), mostly gibberish, are quite common, particularly in children. It is not typically useful to call something a "disorder" unless it is causing a problem. ...
Arnon Weinberg's user avatar
  • 19.6k
3 votes

Why do Spiritual people try to sleep less?

There's a difference between spiritual people and students trying to learn something. Sleep deprivation is an effective tool of breaking old learned routines - you just cant remember them too well ...
Alex Stone's user avatar
  • 9,390
3 votes

Does dreaming cuts our sleeping hours?

One small study (2015) in otherwise healty subjects, found no correlation between nightmares and the quality of sleep measured using widely used objective methods, or more precisely sleep measures ...
the gods from engineering's user avatar
3 votes
Accepted

Is there a known mechanism by which people fall asleep less easy after watching TV?

What you describe is rather common for a certain type of insomnia, called psychophysiologic. The patient has evidence of conditioned sleep difficulty and/ or heightened arousal in bed as ...
the gods from engineering's user avatar
3 votes
Accepted

Why didn't I wake up after dying in a dream?

We still don't know much about dreams, and researching them is, at the most, a volatile kind of attempt to do science. It would be interesting what the statistics in the papers you read were based on, ...
OMan's user avatar
  • 409
3 votes
Accepted

Why might sleeping on the floor alleviate PTSD symptoms?

Why might sleeping on the floor alleviate PTSD symptoms? Question: Does sleeping on the floor have similar neurotransmitter effects, as sleeping under a weighted blanket might? Psychiatrically, would ...
Rob's user avatar
  • 311
3 votes

Is there any scientific data showing one can learn while sleeping?

I am almost a layman but I got to learn something on the subject. As far as I could understand, what in common can be found in wake/sleep and learning are the brain waves. Neurons exchange signals in ...
matte's user avatar
  • 31
3 votes
Accepted

Is Melatonin necessary to sleep?

I don’t have a direct or a very reputable reference to answer this question, but I work in the clinical field and have seen many insomniacs, so I’ll offer you the answers based on the references and ...
user287279's user avatar
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