Navigation Links
Study: Brain connections strengthen during waking hours, weaken during sleep
Date:1/20/2008

MADISON Most people know it from experience: After so many hours of being awake, your brain feels unable to absorb any moreand several hours of sleep will refresh it.

Now new research from the University of Wisconsin School of Medicine and Public Health clarifies this phenomenon, supporting the idea that sleep plays a critical role in the brains ability to change in response to its environment. This ability, called plasticity, is at the heart of learning.

Reporting in the Jan. 20, 2008, online version of Nature Neuroscience, the UW-Madison scientists showed by several measures that synapses nerve cell connections central to brain plasticity were very strong when rodents had been awake and weak when they had been asleep.

The new findings reinforce the UW-Madison researchers highly-debated hypothesis about the role of sleep. They believe that people sleep so that their synapses can downsize and prepare for a new day and the next round of learning and synaptic strengthening.

The human brain expends up to 80 percent of its energy on synaptic activity, constantly adding and strengthening connections in response to all kinds of stimulation, explains study author Chiara Cirelli, associate professor of psychiatry.

Given that each of the millions of neurons in the human brain contains thousands of synapses, this energy expenditure is huge and cant be sustained.

We need an off-line period, when we are not exposed to the environment, to take synapses down, Cirelli say. We believe thats why humans and all living organisms sleep. Without sleep, the brain reaches a saturation point that taxes its energy budget, its store of supplies and its ability to learn further.

To test the theory, researchers conducted both molecular and electro-physiological studies in rats to evaluate synaptic potentiation, or strengthening, and depression, or weakening, following sleeping and waking times. In one set of experiments, they looked at brain slices to measu
'/>"/>

Contact: Dian Land
dj.land@hosp.wisc.edu
608-261-1034
University of Wisconsin-Madison
Source:Eurekalert

Page: 1 2 3

Related medicine news :

1. U of M study: Early treatment can reverse heart damage
2. New study: Pine bark reduces perimenopausal symptoms
3. U of M study: Health food supplement may curb addiction of pathological gamblers
4. New study: Pine bark extract reduces ADHD symptoms in children
5. Kaiser Permanente study: Alcohol amount, not type -- wine, beer, liquor -- triggers breast cancer
6. UGA study: Youth exposed to smokeless tobacco ads despite settlement
7. New National Medicaid Study: Minnesota Under Funds Seniors Nursing Home Care $167 Million Annually
8. Study: Modafinil is effective in treating excessive sleepiness
9. Breaking Study: Masimo Pleth Variability Index (PVI) Shown Effective in Noninvasive Detection of Changes in Ventricular Preload and Fluid Volume
10. New study: pine bark extract boosts nitric oxide production
11. Study: HPV test beats Pap in detecting cervical cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... PA (PRWEB) September 18, 2014 "Medical ... patient care while also maintaining the patient's privacy," said ... up with this idea in order to supply caregivers ... well." , They created a prototype for The Helper ... device enables staff to turn patient onto his or ...
(Date:9/18/2014)... 2014 Companies in the Carbon ... selling it to downstream industries in either gas, liquid ... are food and beverage manufacturers. Food producers use carbon ... or pizzas. The gas is also used as a ... to carbonate soft drinks, beer and other beverages. According ...
(Date:9/18/2014)... Daily supplements of selenium or vitamin E don,t seem ... among men, a new study indicates. Previous animal ... prevent cataracts. To investigate this further, William Christen, from ... Boston, and his colleagues examined data from a randomized, ... was initially designed to study prevention of prostate cancer. ...
(Date:9/18/2014)... Lambertville, NJ (PRWEB) September 18, 2014 ... consulting firm, announced today that President and co-founder ... Business Journal’s Innovation Award Winners for 2014, recognizing ... naming him as an emerging executive of the ... health care and life sciences that continue to ...
(Date:9/18/2014)... 18, 2014 Stealth Health Revolution ... advocate, and Frank Davis, founder of Food for ... are pleased to announce the new recipe book, ... delicious, nutrition-packed meals using Activz whole-food powders." ... step in the Stealth Health Revolution ...
Breaking Medicine News(10 mins):Health News:Carbon Dioxide Production in the US Industry Market Research Report Now Available from IBISWorld 2Health News:Carbon Dioxide Production in the US Industry Market Research Report Now Available from IBISWorld 3Health News:Vitamin E, Selenium Supplements Don't Seem to Prevent Cataracts 2Health News:TayganPoint Executive Receives Prestigious Award from Philadelphia Business Journal 2Health News:Montel Williams and Frank Davis Announce New Whole-Food Nutrition Recipe Book, The Simple Scoop, at Natural Products Expo East In Baltimore 2Health News:Montel Williams and Frank Davis Announce New Whole-Food Nutrition Recipe Book, The Simple Scoop, at Natural Products Expo East In Baltimore 3
... ... scores to the Centers for Medicare and Medicaid Services , ... Houston, TX (PRWEB) October 6, 2009 -- ... beneficiaries in the counties of Harris, Fort Bend, Montgomery, and Galveston on the Mainland, ...
... , New National Survey Finds Jobless Individuals Four Times ... 6 A new national survey shows the economic downturn is ... who are unemployed are four times as likely as those with ... Americans who experienced involuntary changes in their employment status, such as ...
... Oct. 6 iJET Intelligent Risk Systems, a ... services, today announced the third webinar in its ... Resiliency." These interactive webinars help multinational organizations institute ... their organizations, especially amidst the ongoing effects of ...
... ... gathered recently at the Massachusetts Institute of Technology,s Faculty Club for ... being used to save lives, reduce suffering and extend human potential. ... by Alexander Medvedev, PhD., Vice President, Research & Development, Terumo Heart, ...
... bioTheranostics, a bioMerieux company that discovers, develops and commercializes ... company has signed a two-year agreement with Lab21 to ... in the United Kingdom (UK), Ireland and Middle East ... the terms of the agreement, UK-based Lab21 will market ...
... ... the parts washing industry. Midbrook has extensive experience washing parts and equipment in a variety ... facility to help a North American automotive parts supplier solve a de-rusting issue. , ... (Vocus) October 6, 2009 -- ...
Cached Medicine News:Health News:Local Medicare Advantage Plan Scores High on Diabetic Care and Blood Pressure Control 2Health News:Economic Downturn Taking Toll on Americans' Mental Health 2Health News:Economic Downturn Taking Toll on Americans' Mental Health 3Health News:iJET's 'Survive/Thrive' Webinar Series Continues With 'Pandemic Influenza: Where Do We Stand?' 2Health News:iJET's 'Survive/Thrive' Webinar Series Continues With 'Pandemic Influenza: Where Do We Stand?' 3Health News:Terumo Heart, Inc.'s DuraHeart™ Left-Ventricular Assist System Featured at Future of Health Technology Summit 2Health News:Terumo Heart, Inc.'s DuraHeart™ Left-Ventricular Assist System Featured at Future of Health Technology Summit 3Health News:bioTheranostics Announces Commercial Agreement With Lab21 to Market THEROS CancerTYPE ID(R) Molecular Cancer Classifier in United Kingdom, Ireland and Middle East Countries 2Health News:bioTheranostics Announces Commercial Agreement With Lab21 to Market THEROS CancerTYPE ID(R) Molecular Cancer Classifier in United Kingdom, Ireland and Middle East Countries 3Health News:Midbrook Production Washing A Valuable Partner 2Health News:Midbrook Production Washing A Valuable Partner 3
(Date:9/18/2014)... LONDON , September 18, 2014 ... their audience, has updated the incredibly successful Serialisation Countdown ... The interactive PDF, available at pharmaserialisation.com shows ... in which they will be coming into force. ... no longer a matter of "if", but "when" they ...
(Date:9/18/2014)... , Sept. 18, 2014  Zacks.com announces the list ... the Zacks Equity Research analysts discuss the latest news ... recently featured in the blog include the Avanir Pharmaceuticals (Nasdaq: ... NPSP - Free Report ), Orexigen (Nasdaq: ... - Free Report ) and Gilead (Nasdaq: GILD ...
(Date:9/18/2014)... , Sept. 18, 2014  Neurotrope, Inc. (OTCQB: NTRP) ... , M.D., Ph.D. to the Company,s Board of Directors, ... fills a vacancy on the Board of seven members. ... and Corporate Governance Committee and a member of the ... a member of Neurotrope,s Scientific Advisory Board, a position ...
Breaking Medicine Technology:Pharma IQ Displays Worldwide Serialisation Deadlines in their 2014 - 2018 Countdown Calendar 2The Zacks Analyst Blog Highlights: Avanir Pharmaceuticals, NPS Pharmaceuticals, Orexigen, Medivation and Gilead 2The Zacks Analyst Blog Highlights: Avanir Pharmaceuticals, NPS Pharmaceuticals, Orexigen, Medivation and Gilead 3The Zacks Analyst Blog Highlights: Avanir Pharmaceuticals, NPS Pharmaceuticals, Orexigen, Medivation and Gilead 4The Zacks Analyst Blog Highlights: Avanir Pharmaceuticals, NPS Pharmaceuticals, Orexigen, Medivation and Gilead 5The Zacks Analyst Blog Highlights: Avanir Pharmaceuticals, NPS Pharmaceuticals, Orexigen, Medivation and Gilead 6Larry D. Altstiel, M.D., Ph.D. Joins Neurotrope Board of Directors 2Larry D. Altstiel, M.D., Ph.D. Joins Neurotrope Board of Directors 3Larry D. Altstiel, M.D., Ph.D. Joins Neurotrope Board of Directors 4
... AGAWAM, Mass., June 7, 2011 A free white ... validation of their cleaning processes is available from Microtest ... . As many medical devices are made ... plastics, manufacturers may require the use of various agents ...
... Biomedical Inc., a developer of an advanced implantable vena cava ...  The round was led by Three Arch Partners, which was ... Vena cava filters, which were first introduced ... that can lead to a potentially fatal pulmonary embolism (PE). ...
Cached Medicine Technology:New White Paper Helps Medical Device Manufacturers Validate Cleaning Processes 2Crux Successfully Completes Funding for Advanced Filter for PE Prevention 2
... ARUP Laboratories is a national reference laboratory ... research and development. ARUP offers an extensive ... medical tests in clinical and anatomic pathology. ... Laboratories' clients include more than half of ...
... is a national reference laboratory and a ... development. ARUP offers an extensive test menu ... in clinical and anatomic pathology. Owned by ... include more than half of the nation's ...
... is a national reference laboratory and a ... development. ARUP offers an extensive test menu ... in clinical and anatomic pathology. Owned by ... include more than half of the nation's ...
... Laboratories is a national reference laboratory and ... and development. ARUP offers an extensive test ... tests in clinical and anatomic pathology. Owned ... clients include more than half of the ...
Medicine Products: