Related topics: sleep apnea , sleep disorders , insomnia , sleep disturbances , body mass index
Sleep
hideSleep is a natural state of bodily rest observed in humans and other animals. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, and it is more easily reversible than hibernation or coma. It is common to all mammals and birds, and is also seen in many reptiles, amphibians, and fish. In humans, other mammals, and a substantial majority of other animals that have been studied (such as some species of fish, birds, ants, and fruit flies), regular sleep is essential for survival.
The purposes and mechanisms of sleep are only partly clear and are the subject of intense research.
For more information about Sleep, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with sleep
New pattern in our biological clock overturns long-held theory
Oct 08, 2009 |
4.9 / 5 (22) |
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(PhysOrg.com) -- University of Michigan mathematicians and their British colleagues say they have identified the signal that the brain sends to the rest of the body to control biological rhythms, a finding that overturns ...
Dreams may have an important physiological function
Medicine & Health / Neuroscience
Nov 12, 2009 |
3.9 / 5 (27) |
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(PhysOrg.com) -- Dreams have long been assumed to have psychological functions such as consolidating emotional memories and processing experiences or problems, but according to a Harvard psychiatrist and sleep ...
Why sleep? Scientist delves into one of science's great mysteries
Medicine & Health / Neuroscience
Aug 20, 2009 |
4.4 / 5 (22) |
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(PhysOrg.com) -- Bats, birds, box turtles, humans and many other animals share at least one thing in common: They sleep. Humans, in fact, spend roughly one-third of their lives asleep, but sleep researchers still don't know ...
'Sleep talking' PCs save energy and money
Technology / Computer Sciences
Apr 24, 2009 |
4.8 / 5 (16) |
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Personal computers may soon save large amounts of energy by "sleep talking." Computer scientists at UC San Diego and Microsoft Research have created a plug-and-play hardware prototype for personal computers ...
A Single Neuron Can Change the Activity of the Whole Brain
Medicine & Health / Neuroscience
May 01, 2009 |
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(PhysOrg.com) -- The pulsing of a single neuron can switch a brain’s waves from the equivalent of a big ocean swell to ripples on a pond, according to new research from Howard Hughes Medical Institute investigator ...
Direct evidence of role of sleep in memory formation is uncovered
Medicine & Health / Neuroscience
Sep 15, 2009 |
5 / 5 (11) |
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A Rutgers University, Newark and Collége de France, Paris research team has pinpointed for the first time the mechanism that takes place during sleep that causes learning and memory formation to occur.
CIA's 'Enhanced Interrogation' Techniques Were Counterproductive
Medicine & Health / Neuroscience
Sep 29, 2009 |
3.9 / 5 (14) |
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(PhysOrg.com) -- The author of a new report suggests the belief that harsh interrogation and torture techniques are effective is a form of folk neuroscience that is not supported by scientific evidence, and does not fit with ...
Why Sleep is Needed to Form Memories
Feb 11, 2009 |
4.9 / 5 (10) |
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If you ever argued with your mother when she told you to get some sleep after studying for an exam instead of pulling an all-nighter, you owe her an apology, because it turns out she's right. And now, scientists ...
The Role of Sleep in Learning New Words
Medicine & Health / Psychology & Psychiatry
Sep 11, 2009 |
5 / 5 (9) |
1
(PhysOrg.com) -- A new study has demonstrated for the first time the importance of sleep in learning new words, and has shown the process has fast and slow components. The slow component is associated with ...
Sleep helps build long-term memories
Medicine & Health / Neuroscience
Jun 24, 2009 |
4.8 / 5 (9) |
1
(PhysOrg.com) -- Experts have long suspected that part of the process of turning fleeting short-term memories into lasting long-term memories occurs during sleep. Now, researchers at the RIKEN-MIT Center for ...
Waking up memories while you sleep
Medicine & Health / Neuroscience
Nov 19, 2009 |
4.2 / 5 (9) |
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They were in a deep sleep, yet sounds, such as a teakettle whistle and a cat's meow, somehow penetrated their slumber. The 25 sounds presented during the nap were reminders of earlier spatial learning, though the Northwestern ...
Baby's first dreams: Research reveals sleep cycles in early fetus
Medicine & Health / Neuroscience
Apr 13, 2009 |
4.6 / 5 (8) |
3
After about seven months growing in the womb, a human fetus spends most of its time asleep. Its brain cycles back and forth between the frenzied activity of rapid eye movement (REM) sleep and the quiet resting ...
Dolphins maintain round-the-clock visual vigilance
May 01, 2009 |
4.6 / 5 (8) |
2
Dolphins have a clever trick for overcoming sleep deprivation. Sam Ridgway from the US Navy Marine Mammal Program explains that they are able to send half of their brains to sleep while the other half remains ...
You must remember this: Scientists develop nasal spray that improves memory
Oct 01, 2009 |
3.4 / 5 (11) |
4
Good news for procrastinating students: a nasal spray developed by a team of German scientists promises to give late night cram sessions a major boost, if a good night's sleep follows. In a research report featured as the ...
8 hours -- or else
Mar 27, 2009 |
4.3 / 5 (8) |
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Americans are sleeping less than ever, according to a new National Sleep Foundation poll. Some people are losing sleep because of the economy. Some are staying up too late and getting up too early. Some have disorders such ...
