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.

28 questions with no upvoted or accepted answers
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If stimulus triggers dopamine release, can dopamine release trigger memory recall of stimulus?

Modern science of sleep is starting to lean towards a viewpoint that dopamine has an important function in dreaming, and that dopaminergic pathways - mesolimbic and mesocortical are activated during ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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 ...
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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:...
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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 ...
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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 ...
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37 views

Is there research evidence to suggest that waking up slowly is more beneficial than waking up abruptly?

There are several articles I've found which seem to anecdotally back up the suggestion that waking up slowly is better than waking up abruptly, in terms of combatting sleep inertia: https://www....
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99 views

How does Free Running Sleep Disorder (FRSD) in humans get treated as of 2020s?

From reading accessible information about Free Running Sleep Disorder (FRSD) in humans, I understand it is a chronic and cyclic sleep disorder of a totally unentrained 24-hours circadian rhythm. ...
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35 views

How does a nap affect nighttime sleep duration?

How does a nap of the kind that is often recommended – that is, early afternoon and no more than 30 minutes – affect nighttime sleep, especially the duration of nighttime sleep, but also its quality? ...
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Third time's the Charm: any research into how we learn from error?

I have often told people that I make a mistake two different ways before I really understand a situation. Is there any research that explains how and why this works? As an analogy, there is something ...
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40 views

Sleep/Dream and Logical Decisions

I discovered that sleep tends to mitigate the 'stress' that one gets by trying to deal with logical problems like work related tasks and general daily life tasks. Does sleep do this by removing the ...
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22 views

Effects of Red vs. Green ambient lighting on sleep

I would like to know if there has been study on the difference of effect of red vs green ambient light on human sleep. This is specifically in the interest of choosing between red or green alarm clock ...
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45 views

Why people feel more sleepy while doing something that's not interesting even when they are not actually tired?

We often see people and students yawning while reading a boring course book. But, when told about something interesting, their sleepiness vanishes. Why and how does this happen? What are the exact ...
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48 views

What causes the lack of focus due to sleep deprivation? What are the outcomes of this?

When one is sleepy and one attempt's to work on something cognitively demanding, such as doing algebra in one's head, or trying to imagine a house's interior in detail, what causes the "resistance" to ...
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52 views

Do we have an “internal timer” when taking naps?

I´m doing some research and can´t find what control some reactions during naps. For example, after 1 year taking the same bus way home, my brain mastered the timing of napping. Wherever i get on, i ...
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75 views

How do afternoon naps fit in with segmented sleep?

Both segmented sleep and afternoon naps are recommended over a monophasic eight-hour block of sleep, but I don't see how they fit in with each other. Segmented sleep is the theory/hypothesis that ...
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85 views

Effect of mid-day sleep on mood and performance

Is there any clearly identifiable reason explaining why sleeping during the day (for longer than 30 minutes) could produce lowered mood, difficulty in concentrating, overall decreased cognitive ...
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22 views

What is the permanent effect of sleep-deprivation on the brain and its cognitive function?

I know that many teenagers suffer from chronic sleep-deprivation. This varies from country to country, but it is widely known that especially students suffer from this condition. Most have a mild form ...
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19 views

What does it mean if you are in a sleeping state and you hear a sound that your brain is immediately aware of?

When you are in a sleeping state ,i.e.lying in bed before your alarm clock rings, and you hear a noise or a voice that is not too loud and is not continuous but impulsive, and your brain immediately ...
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38 views

Mean brainwave amplitude

When measuring nocturnal sleep for a person that has narcolepsy using an EEG a distinctive lack or reduction of slow wave sleep activity is indicated. Slow wave sleep brainwaves are the brainwaves ...
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36 views

What thoughts should one contemplate to minimize sleep latency?

While trying to fall asleep on night, I was wondering what my strategy would be if I was challenged to a competition where the goal was to fall asleep as fast as possible once I was lying in bed. The ...
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128 views

NREM sleep and REM sleep

Why is the first stage of sleep non-rapid eye movement (NREM) sleep, and why does rapid eye movement (REM) not happen during this first stage, although we remain partially awake?
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Can people hallucinate paranormal activity with surrounding physical objects during night terrors and sleep paralysis?

I've been watching first-hand accounts of people who have experienced sleep paralysis and night terrors. My own personal impression after watching and reading many such accounts is that the most ...