Questions tagged [sleep]

For questions pertaining to the physiology and pathophysiology of sleep in humans and animals (e.g., sleep stages and their EEG patterns, sleep disturbances), along with psychological effects of sleep deprivation or fatigue.

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6
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1answer
480 views

Is learning facts via audio while sleeping possible?

Is there a way to make onself remember facts from an audiobook (containing for instance a list of countries and their capitals) played out loud while sleeping?
6
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1answer
127 views

Waking around the same time without an alarm

Anecdotal background I find that regardless of what time I go to bed, or how exhausted I am, I always wake up the next morning between 5 and 6am. This is despite my alarm being consistently set for ...
6
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1answer
523 views

Can split-brain patients sleep like whales?

Regular split-brain patients still have some remaining connection between the hemispheres, but would it be possible for their hemispheres to fall asleep independent of each other? What about when not ...
6
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1answer
204 views

Can one incubate on a specific idea in one's sleep?

In this question it is described that intentionally not thinking about a problem can allow the subsonscious to find an answer to the problem; this is known as incubation. I have heard and read it a ...
6
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3answers
319 views

Is it possible to induce the processes that occur during sleep such as memory “garbage collection” without actually sleeping?

Some time ago I opened a question comparing drug withdrawal and sleep deprivation symptoms. In fact, my main objective for that question was to know if there was by any chance, a possibility to live ...
6
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1answer
245 views

Sleep deprivation and task performance

Case: In case of an adult, the average adult sleep time required is 7.5 to 8 hours. Suppose the person (aged between 23-29) has slept only 6 hours, or less than the average time (7.5 to 8 hours). ...
6
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1answer
1k views

What is the difference between drug withdrawal and sleep deprivation effects?

Personal sleep-deprivation study: Recently, I posed a question that I'm sure many people find tough already: "Do I really need to sleep?", and so I tested myself, I spent two days without sleeping. ...
6
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0answers
18 views

While dreaming, are memories replayed faster or slower? [duplicate]

In Chapter 3 of his book Why We Sleep: Unlocking the Power of Sleep and Dreams, Matthew Walker explains "time dilation in dreams": One last temporal distortion deserves mention here—that of time ...
5
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1answer
243 views

Why would a behaviour effect one sex?

After reading the article Regular sleeping hours really are good for children—if they are girls I started wondering what would be a good explanation for something such as sleep patterns have an affect ...
5
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1answer
95 views

Is Melatonin necessary to sleep?

Consider a scenario where a person's melatonin secretion gets inhibited (and that person also don't get external melatonin); Will this person feel sleepiness and a desire to sleep? Or, since that ...
5
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1answer
134 views

Does a short nap improve learning efficiency?

When one attempts to learn a new skill (e.g., play a guitar), it is often heard that the first hour of practice is more effective than the second. I have heard some people say that even 10 minutes of ...
5
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1answer
194 views

Does the brain need more sleep after heavy load?

Does the brain require more sleep in the following night, if you have used a lot more of its capacity that day than usually?
5
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0answers
32 views

How to compare cumulative sleep debts? [duplicate]

Let's say that after a period of sleeping perfectly, I sleep for the following amount of hours on some consecutive days. (Let's say the optimal hours I sleep is 8 hours. For the sake of simplicity, ...
5
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0answers
90 views

Why is it so difficult to recall dreams? [duplicate]

You see a dream and wake up during or after it and you remember the dream. Why is it so difficult to remember the dream in the morning, unless you write it down directly when woke up in the night?
4
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1answer
124 views

How can someone asleep recognize a very brief sound?

I have a snoring girlfriend. To interrupt her snoring, I make a sound similar to the very brief sound gas makes when opening a soda can or bottle (had a snoring brother, I know this technique works ...
4
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2answers
473 views

Do neurons fire at a faster rate during dreaming?

When I dream it seems that the (subjective) time is slower than the objectively passed time as seen on my clock radio. Is this because neurones fire collectively at a faster rate, so you can "put an ...
4
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1answer
557 views

How much sleep is needed for peak cognitive performance?

How much sleep is needed for peak cognitive performance? If some were to, for example, wake up one morning at 12:30PM, would a sleeping pill help obtain better sleep required for that performance the ...
4
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2answers
147 views

Is there a way to make oneself more sleepy?

Background motivation: Is there is a way to correct sleeping patterns to go to bed at least at midnight, not later than that? If I do not feel tired/sleepy enough, can I "prime" or "cheat" myself to ...
4
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1answer
516 views

Is it possible to sleep with your eyes open?

It is generally observed that animals and human alike close their eyes when they sleep. It looks seemingly natural. But I have heard (and might have observed one too, just not sure whether he was ...
4
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1answer
2k views

Difference between drowsiness/sedation and sleepiness

I have been trying to understand the difference between drowsiness/sedation and sleepiness. The only article I was able to find that partly answers my question is "The difference between sedation and ...
4
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1answer
9k views

Is it counter-productive to study while tired?

I've noticed I retain a much smaller fraction of the information I consume when I'm tired compared to when I'm well slept. Not only that, but I typically have to revisit the same material more times ...
4
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1answer
79 views

If sleeping is related to 'saving information' you've experience, is forgetting related to more energy?

So I was watching this youtube video (Only check 1:05 - 1:25) where it suggested we sleep because the brain needs rest to save/process all information we perceived throughout the day. I directly made ...
4
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2answers
211 views

Do you need sleep every night?

I haven't slept for a day, but feel fine. It is sometimes assumed that one needs 8 hours of sleep each night, but I think this is sometimes not true. Is it okay to get no sleep one night and then 8-...
4
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1answer
174 views

What is actually going on in your brain during a night terror?

I used to have really bad night terrors back in the day, where I would think I was floating and I would wake up and actually my vision would be very fuzzy - so I just want to know.. What is actually ...
4
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1answer
569 views

What are the neurobiological triggers for sleepwalking?

This phenomena has always fascinated me, ever since my parents told me (and filmed me) doing exactly that - sleepwalking. I have read the pamphlet "Sleepwalking" from the Sleep Health Foundation, ...
4
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1answer
157 views

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

Sleeping during the day might lead e.g. to vitamin D deficiency. But I am interested in what effects might night-sleep-deprivation have on cognitive faculties. Does sleeping during the day and ...
4
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1answer
3k views

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

It would be best if the answer could be broken down by age and sex, and even by other variables (alcohol-drinker vs teetotaller, etc). If there's a difference between self-report data and data from ...
4
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2answers
363 views

For an average adult, in general, if one knows they will wake up in the middle of a cycle--is it better to go to bed later?

Let us say that one consistently goes to sleep at the same time every day, and sets an alarm for the same duration of sleep 7 hours and 45 minutes (e.g., 10:45pm to 6:30am). One day, they get caught ...
4
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1answer
125 views

How are real life events translated into dream symbolism?

I'm interested in how significant events from daily life get encoded or translated into dream content. A personal observation can help clarify my question: I've observed that for me, "significant, ...
4
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2answers
146 views

Research shows that doing anything in bed other than sleeping can disrupt sleep. What if these other things are done on another bed?

I read this and some other articles stating that you should not do anything in bed except sleep. This includes studying, eating, and watching T.V, because your brain will have a difficult time ...
4
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1answer
1k views

Why past events reappear in dreams after a certain delay?

I know that Freud in his "Interpretation of dreams" provides a number of examples of events influencing dreams several days to several months after the event has occurred. For example, a person sees a ...
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0answers
49 views

Adaptation to Discrete Perturbation in Sleep?

Generally, are there and how long do lingering affects of polar sleep patterns affect someone? For example, assume someone slept for 2 hours one day and then slept for 14 hours the next. Their 2 day ...
4
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0answers
119 views

Is the brain more active when you do something in a dream or when awake?

If brain activity is measured using EEG, is the brain more active when asleep and dreaming of doing something or doing the same thing when awake? Of course, if you do exercise (eg. running) when ...
4
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0answers
9k views

Is it true that drinking water before bed causes dreams to be more vivid?

Pavan Teja says on Psychtronics: Drink a lot of water. The more water you drink before bed, the more vivid your dreams. Is this true? Is this because I'm more alert not to, you know, and therefore ...
3
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2answers
791 views

Sleep vs. Trance

I've been recently reading about hypnosis and I'm asking this question because I've had certain personal experiences that makes me confuse the term Trance with just simple sleep. I'm not a fan of ...
3
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1answer
129 views

Can you Counteract the Negative Effects of Sleep Deprivation?

There are many studies accounting the negative effects of sleep deprivation which all seem to detail the deficiency of time for your body to "reset" and how this leave it in a depleted state. If you: ...
3
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1answer
339 views

Understanding Melatonin

Is my understanding roughly correct? Melatonin is 'generated' in the absence of specific wavelengths of light. It accumulates and is only reduced by sleep, in particular REM sleep. Melatonin and ...
3
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1answer
76 views

Can meditation be associated to lucid dream?

The principal reason of this question is that I know people that can willingly enter in lucid dream (and so do what they want in it, and wake up when they want). Some of then use EEG (not ...
3
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1answer
58 views

Where to find historical dream activity data?

Is it just me, or are we dreaming less? Maybe it's the computer screens in our face all day. Maybe that's just what happens when we get older. I'm wondering if there's a resource of some kind to ...
3
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1answer
122 views

How do I change my tiredness patterns?

All of you probably know what the human 'circadian cycle' is, and depending on your personality, you would either be a night-owl or a morning-lark. I am interested in understanding the patterns of ...
3
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1answer
52 views

Is there consciouness when a person is sleeping and not dreaming?

According to Consciouness Consciousness is the state or quality of awareness or of being aware of an external object or something within oneself. I suppose dreaming qualifies as "being aware ...
3
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0answers
57 views

What would be areas of ethical or safety concerns with a smartphone app interacting with people sleeping?

The BBC News article Hi-tech dreamcatcher defeats sleep amnesia mentions a recent talk by Adam Haar Horowitz and then describes some limited tests of an apparatus called Dormio at the MIT media lab, ...
3
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0answers
46 views

Why does daylight-saving have such a big impact on us and weekends don't?

Last weekend, at least in Germany, the clock got switched from 2:00 AM to 3:00 AM. Today I found a few articles, that suggest, that the daylight-saving has a big impact on people. Judges punish ...
3
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0answers
48 views

Is there any evidence that better sleep reduces the symptoms of chronic severe Fibromyalgia?

Is there any evidence that better sleep reduces the symptoms of chronic severe Fibromyalgia? Severe fibromyalgia has been linked to the possible depletion of serotonin through prolonged and ...
3
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0answers
70 views

Is there a relationship between the amount of time spent awake/asleep, and interstitial waste removal in the brain?

With regard to the glymphatic system, is here a relationship between: The amount of time spent awake and the amount of interstitial waste accumulated in the brain? The amount of time spent asleep and ...
3
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0answers
106 views

Relation between Sleeping pattern and attention for ADHD people

Question 1: Does sleeping at different times daily affect the attention for ADHD and Non ADHD ? For example let us consider the below scenario, Day 1 : Sleep time is 1:00 AM Day 2 : Sleep time is 2:...
3
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0answers
130 views

How to work on a research problem while sleeping? [duplicate]

Put it more formally, how to let your mind subconsciously work on a research problem when you are not actively thinking about it, e.g., during sleep, dinner, walking, or shower? Often I hear stories ...
3
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0answers
469 views

How does the body experience free-fall during a hypnic jerk

Today I learned that a sudden jerk that you sometimes experience when you are just about to fall asleep due to a sense of free-fall or weightlessness is called a hypnic jerk. If, while sleeping, I ...
3
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1answer
346 views

Is there a way to hasten recovery from sleep inertia?

Sleep inertia is a transitional state of lowered arousal occurring immediately after awakening from sleep and producing a temporary decrement in subsequent performance. (1) There is study ...
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0answers
48 views

When falling asleep does one always start with NREM1?

After my admittedly short research I could not find information which states that if a person is disturbed while their sleeping, let's say in NREM3 phase of their sleep cycle, and wakes up and then ...