Navigation Links
Why sleep? UCLA scientist delves into one of science's great mysteries
Date:8/20/2009

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 why.

According to the journal Science, the function of sleep is one of the 125 greatest unsolved mysteries in science. Theories range from brain "maintenance" including memory consolidation and pruning to reversing damage from oxidative stress suffered while awake, to promoting longevity. None of these theories are well established, and many are mutually exclusive.

Now, a new analysis by Jerome Siegel, UCLA professor of psychiatry and director of the Center for Sleep Research at the Semel Institute for Neuroscience and Human Behavior at UCLA and the Sepulveda Veterans Affairs Medical Center, has concluded that sleep's primary function is to increase animals' efficiency and minimize their risk by regulating the duration and timing of their behavior.

The research appears in the current online edition of the journal Nature Reviews Neuroscience.

"Sleep has normally been viewed as something negative for survival because sleeping animals may be vulnerable to predation and they can't perform the behaviors that ensure survival," Siegel said. These behaviors include eating, procreating, caring for family members, monitoring the environment for danger and scouting for prey.

"So it's been thought that sleep must serve some as-yet unidentified physiological or neural function that can't be accomplished when animals are awake," he said.

Siegel's lab conducted a new survey of the sleep times of a broad range of animals, examining everything from the platypus and the walrus to the echidna, a small, burrowing, egg-laying mammal covered in spines. The researchers concluded that sleep itself is highly adaptive, much like the inactive states seen in a wide range of species, starting with pl
'/>"/>

Contact: Mark Wheeler
mwheeler@mednet.ucla.edu
310-794-2265
University of California - Los Angeles
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/19/2014)... week,s Eos: Long-Term Ecological Research and Network-Level Science, , ... a wide range of ecosystems was responding to global ... particularly powerful if it coupled multiple decades of information ... experiments and models from dozens of different ecosystem types. ... the Long-Term Ecological Research (LTER) Network, which will soon ...
(Date:8/19/2014)... MIT chemical engineers have devised a new implantable tissue ... slowly over a few weeks. When applied to bone ... to rapidly form new bone that looks and behaves ... coated scaffold could offer a dramatic improvement over the ... bone from another part of the patient,s body ...
(Date:8/19/2014)... during warm phases and became extinct during cold phases, ... link between marine crocodilian diversity and the evolution of ... million years. , The research, led by Dr ... formerly from the University of Bristol, UK is published ... are ,cold-blooded, animals that mainly live in fresh waters ...
Breaking Biology News(10 mins):This week from AGU: Long-term ecological research, predicting cholera outbreaks 2Engineering new bone growth 2Engineering new bone growth 3Evolution of marine crocodilians constrained by ocean temperatures 2
... a new method -- "inverse Partial Fluorescence Yield" (iPFY) ... the electronic structure of liquids free of sample damages. ... LiXEdrom experimental chamber, where a fluid stream of micrometer ... irradiated with X-ray radiation. These kinds of experiments ...
... a recent expedition to the inhospitable North Atlantic Ocean, scientists ... growth of tiny plants were stumped to discover that the ... to offer the light they need for their growth spurt. ... longer days and calmer seas that force phytoplankton near the ...
... JUPITER, FL, July 5, 2012 Scientists from the Florida ... of intricate biochemical steps that lead to the successful production ... The study, which appears in the July 6, 2012 ... the assembly of a structure called the ribosome, a large ...
Cached Biology News:Aqueous iron interacts as strong as solid iron 2Eddies, not sunlight, spur annual bloom of tiny plants in North Atlantic 2Eddies, not sunlight, spur annual bloom of tiny plants in North Atlantic 3Scripps Florida scientists identify critical 'quality control' for cell growth 2
(Date:8/18/2014)... 2014 Deep Research Report on ... and in-depth research report on the China Linalool ... including its definition, classification, application, and industry chain ... covers the international market analysis, including China’s domestic ... macroeconomic environment & economic situation analysis. The report ...
(Date:8/18/2014)... Aug. 18, 2014 BioElectronics Corporation ... consumer medical devices said that its EVP ... by CEOLIVE.TV as part of its Executive ... is available at http://ceolive.tv/bioelectronics-corp-otc-biel/biel-videos/2282-ceolive-tv-interview-bioelectronics-corp-otcqb-biel ... to investors the unique advantages of BioElectronics ...
(Date:8/18/2014)... Global HIV Infection Drug Market and Pipeline Insight ... of HIV infection and the number of deaths due to ... rate across the globe. It has been estimated that the ... in 2013, with the rates for children being even much ... infection rates has been the improved access to antiretroviral drugs ...
(Date:8/18/2014)... , Aug. 18, 2014 TNI BioTech, Inc. ... pioneering the manufacturing and marketing of innovative therapies for ... Company is providing a second notice of TNI BioTech,s ... making the announcement, Noreen Griffin , founder and ... advance for your participation in the Annual Meeting. On ...
Breaking Biology Technology:Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 2Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 3Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 4BioElectronics EVP Dr. Deepak Kotak Interviewed on CEO Live 2BioElectronics EVP Dr. Deepak Kotak Interviewed on CEO Live 3Global HIV Infection Drug Market Overview 2Global HIV Infection Drug Market Overview 3Global HIV Infection Drug Market Overview 4TNI BioTech Inc., provides 2nd Notice of Annual Meeting September 4, 2014 2TNI BioTech Inc., provides 2nd Notice of Annual Meeting September 4, 2014 3TNI BioTech Inc., provides 2nd Notice of Annual Meeting September 4, 2014 4
... EDEN PRAIRIE, Minn., Oct. 7 ACIST Medical ... new 75,000 square foot,expanded corporate Headquarters and manufacturing ... Pawlenty and Eden Prairie Mayor Phil Young will,join ... for a ribbon cutting,ceremony at the company,s new ...
... Roche Diagnostics Makes List for Fourth Consecutive ... ranked Roche,Diagnostics as one of the magazine,s ... bestowed to only a handful of companies ... Diagnostics, which ranked No. 86, in the ...
... Oct. 7 /Xinhua-PRNewswire-FirstCall/ -- Huifeng Bio-,Pharmaceutical Technology, Inc. ... and producer of plant extracts and pharmaceutical raw,materials ... in,Xi,an, China, is pleased to announce the signing ... Xintong Medical Ltd ("Qinba"). On,Sept 5, 2008 the ...
Cached Biology Technology:ACIST Medical Systems Announces the Opening of Its New Expanded Corporate Headquarters in Eden Prairie, MN 2ACIST Medical Systems Announces the Opening of Its New Expanded Corporate Headquarters in Eden Prairie, MN 3InformationWeek Puts Roche Diagnostics on Top 500 Innovative Tech Users List 2Huifeng Bio-Pharmaceutical (HFGB) Signs Exclusive Management Operating Agreement with Xi'an Qinba Xintong Medical Ltd.; HFGB to Retain Up to 70% of Qinba's Total Profit 2
in vitro Translation, Accessory Products...
... (serial analysis of gene expression) ... analysis. Expression profiles generated by ... detect low-abundance transcripts making it ... The I-SAGE Kit is designed ...
Sheep Serum US Origin...
... and flexibility press-to-seal silicone isolators can be ... researcher. They are available either pre-cut to ... that can be easily trimmed to prepare ... non-cytotoxic and can be used to isolate ...
Biology Products: