The biological process characterized by reversible unconsciousness, unresponsiveness to external stimuli and motor passivity.
Questions tagged [sleep]
155 questions
24
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2 answers
Does sleeping fewer hours than needed cause common cold?
Does sleeping fewer hours than needed cause the common cold? If so, how?
rahul
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18
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Do humans sneeze or cough in their sleep?
As far as I know, I've never seen anyone sneeze or cough while they're sleeping. Google wasn't very helpful either; a lot of contradicting claims.
So the questions remains: do humans sneeze or cough in their sleep? (a few other things I've never…
Simon Verbeke
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What are the effects of sleep deprivation?
Having recently pulled an "all-nighter" while trying to fix a fatal bug in our release code, I started thinking of any health risks that I might have.
What are the adverse effects of staying up for staying up for 42 hours, considering I took no…
Alexander Craggs
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11
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Why sleep? No, actually, why wake?
I was just reading the sleep threads, and I wondered, why is the body so constructed so that sleep is necessary? (Is it just a design error?) But then, how do things come to be awake at all? How did this happen? Yes, I can see the advantages, but…
RedSonja
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What is happening physically when I get sleepy and when I wake up?
After a week of too little sleep, I slept about 12 hours last night to "catch up". It made me wonder: what is happening physically that signals that I'm done sleeping, or conversely, that I need to sleep. I read this question and its answers,…
user4200
5
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1 answer
Do deaf people sleep better?
Since deaf people can't hear, is relaxing and falling asleep easier for them? In general, do they sleep better than hearing people?
Of course some hearing people have no trouble getting to sleep, but others awaken whenever they hear a sound.
Guest
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Biological origin of shuddering during sleep
What is the biological origin of the following behavior:
Sometimes, during the early, formative phase of sleep (when you have a gradually dimming consciousness of what all is happening around), you feel some kind of a tremor of sorts - a feeling as…
299792458
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Why is Sleep apnea only risk to males?
I was reading this article. In Risk Factors, it clearly mention "Being a male".
Why is Sleep apnea only risk to males?
Peter Quinn
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4
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Is it better to maximize sleep, or align to ~1.5 hr cycles
What is better for the body, to sleep 6 hours (4 deep sleep cycles) or to sleep 7 hours, but interrupting the last sleep cycle. I know I feel a lot better with 6, but am curious as to its medical consequences. Does the brain have a chance to…
Rich
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Is once per day the optimal sleep pattern for all mammals?
If a typical human body clock is 8 hours sleep, 16 hours awake, interested to know if any mammals have:
a 12 hour body clock (4 hours sleep, 8 hours awake)
a 6 hour body clock (2 hours sleep, 4 hours awake)
And very interested to know if any…
stevec
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Are there any multi-cellular organisms out there that do not sleep?
Looking around I see animals - ants, bees, birds, lizards, roaches all the way up to humans appear during a part of the day and not other parts. I would guess there is a sleep/recovery cycle involved.
Is there any multi-cellular organism with a…
Everyone
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Why do body parts sometimes get a itching and tingling feeling when falling asleep?
Just before I fall asleep I sometimes experience an itchy and stinging feeling in my body parts. It can be that the nose or neck suddenly start to itch or a tingling stinging feeling in the legs. Sometimes my fingers also start to do small…
Markus
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How loud a sound would need to be to wake someone up?
I have been researching about this and it looks like the term would be auditory arousal threshold. Imagine you fall asleep while listening to music with earbuds. Out of a sudden, the device starts playing really loud music (let´s say 40 dB higher…
the_moon
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Effect of sleep deprivation on pupils and pupillary responses
What is the effect, if any, of sleep deprivation on pupils? Specifically:
Are pupils more dilated/constricted?
Is the pupillary response to light any different?
Anything else?
Saul McShane
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2
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Can you recharge without sleeping?
Sometimes it's difficult falling asleep for almost an entire night. You might feel like getting up and being productive instead, or 'pull an all-nighter'.
Or you can try to simply lay in bed to relax and rest, even though sleep does not kick in. In…
Marc Dingena
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