Navigation Links
Deep sleep short-circuits brain's grid of connectivity

eed, research subjects woken early in the night frequently report little or no conscious experience. Later in the night, and especially in the morning hours, subjects report vivid dreams, indicating that the later stages of sleep can be associated with conscious experience, Tononi says.

But why does consciousness fade during deep sleep early in the night? "You cannot say that consciousness fades because the brain shuts off. That's not the case. Scientists have long known that the brain remains active while we sleep," Tononi says. "So what could be responsible?"

To explore the breakdown of consciousness during sleep, Tononi and his colleagues capitalized on a new technology - transcranial magnetic stimulation - that permits precise, non-invasive activation of small regions of the brain. Subjects are also equipped with a cap of electrodes to monitor the brain's electrical activity so that the cell signals elicited by the quick bursts of electricity can be tracked.

In subjects who are awake, the pulses elicited a significant response: "The brain reacts in a strong and specific manner," Tononi explains. "There is a very interesting set of activations that occur over great distances in the cortex.

"During deep sleep early in the night," he adds, "the response is short-lived and doesn't propagate at all. Somehow, it doesn't travel anywhere."

The experiments conducted by the Wisconsin team are the first of their kind. The results lend support to the idea that consciousness depends on the ability of the brain to integrate information. In other words, consciousness rests on the ability of the various regions of the brain to talk to one another.

In the brain, messages are relayed along networks of nerve fibers. Cells transmit information along those fibers electrochemically. Anatomically, the fibers are analogous to the cables that computers use to share information. But the network of nerve fibers, like a tangle of computer c
'"/>

Source:University of Wisconsin-Madison


Page: 1 2 3

Related biology news :

1. Wisconsin researchers identify sleep gene
2. Brain-mapping technique aids understanding of sleep, wakefulness
3. Newly discovered protein an important tool for sleeping sickness research
4. Compound might defeat African sleeping sickness, clinical trial beginning this month
5. Flies on speed offer insight into the roles of dopamine in sleep and arousal
6. Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect
7. Waking a sleeping virus
8. Morning grogginess more debilitating than sleep deprivation, according to CU-Boulder study
9. Losing sleep undoes the rejuvenating effects new learning has on the brain
10. A large step forward in the fight against African sleeping sickness
11. Serotonin, acting in a specific brain region, promotes sleep in fruit flies
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Deep sleep short circuits brain grid connectivity

(Date:9/30/2014)... DURHAM, N.C. -- Pollution in urban and farm runoff ... a new study finds. , The study, published ... shows that nitrogen in the runoff ends up in ... tumors on the animals, eyes, flippers and internal organs. ... and the National Oceanic and Atmospheric Administration (NOAA) conducted ...
(Date:9/30/2014)... to know what goes wrong with your muscles because of ... what "normal" actually is. That,s where a new research report ... FASEB Journal comes in. In the report, a ... molecules that can help scientists "see" which genes are active ... found never-before-detected gene activity and that men have approximately 400 ...
(Date:9/30/2014)... 30, 2014  Spectra Automation, a trusted ... biotech and power generation industries, announced today ... Manager, an easy-to-use and cost-effective data collection, ... development laboratories. Most upstream ... analyzer systems. Accessing and consolidating data from ...
Breaking Biology News(10 mins):Pollution linked to lethal sea turtle tumors 2Pollution linked to lethal sea turtle tumors 3Scientists identify which genes are active in muscles of men and women 2Spectra Automation Introduces RECONN Bioprocess Manager 2
... schemes that allow payments to landholders for planting trees, ... of carbon from the atmosphere. But they will have ... supply problems, if other benefits and disbenefits from revegetating ... land-use decisions, according to an article published in the ...
... Ky. - Does gum disease indicate future joint problems? ... association between two prevalent chronic inflammatory diseases - periodontal ... have remained unclear. In an article published today ... of Dentistry Oral Health and Systemic Diseases group researcher ...
... cancer drug, called Gamitrinib, for trial in humans, The Wistar ... Department of Defense,s Congressionally Directed Medical Research Program. ... the data necessary to allow the use of Gamitrinib in ... file an Investigational New Drug application with the US Food ...
Cached Biology News:Bacteria responsible for gum disease facilitates rheumatoid arthritis 2Wistar receives $1.5 million Department of Defense grant to ready prostate drug for clinical use 2Wistar receives $1.5 million Department of Defense grant to ready prostate drug for clinical use 3
(Date:9/30/2014)...  RegeneRx Biopharmaceuticals, Inc. (OTC: RGRX) ("the Company" ... a Canadian Patent for Inhibition or Reversal of ... claims using thymosin beta 4, various fragments and ... purposes.  The patent will expire in 2021. ... ) RegeneRx is focused on ...
(Date:9/30/2014)... 30, 2014 Fast, semi-automatic ... chemistry in documents ChemAxon , ... consulting services for life science research, launches ChemCurator, ... Markush structures from documents. Markush structures ... however generating and understanding Markush structures is a ...
(Date:9/30/2014)... September 30, 2014 OriginOil Inc. (OTC/QB: ... chemical-free process to clean up large quantities of water, ... Riggs Eckelberry reported on the launch of the company's ... site provided by partner STW Resources . , ... barrels per day (bpd) and achieved a 99.8% reduction ...
(Date:9/30/2014)... and ROCKVILLE, Md., Sept. 30, 2014 ... partnership focusing on commercializing market-relevant biohealth innovations and increasing ... , announced today that venture capitalist, Tania ... a strategic advisor. Dr. Fernandez will be a member ... Fund, which will provide up to $50 million in ...
Breaking Biology Technology:RegeneRx Receives Canadian Patent for Inhibition or Reversal of Skin Aging 2ChemAxon Introduces ChemCurator for Chemical Information Extraction and Markush Structure Creation 2OriginOil, Inc. Report to Shareholders: Blue Gold in West Texas 2Seasoned Life Sciences Venture Capitalist Tania Fernandez Joins BHI to Help Manage New BioHealth Gap Fund 2
... Vasogen Inc. (NASDAQ: VSGN ; TSX:VAS) today reported the ... 2009. All dollar amounts referenced herein are in Canadian dollars ... and cash equivalents totaled $7.3 million, compared with $8.6 million ... for the three months ended February 28, 2009 of $1.9 ...
... Wash., April 13 BioLife Solutions, Inc.,(OTC ... marketer of proprietary,cGMP hypothermic storage and cryopreservation ... announced that the Rutgers University ... university-based biologics repository,has adopted the Company,s CryoStor ...
... Cell Biosciences, Inc., a provider of nanoproteomic analysis systems ... a landmark study by a research team from ... Felsher, Associate Professor of Oncology, was senior author on ... serial analysis of oncoprotein activation in clinical samples", appeared ...
Cached Biology Technology:Vasogen Announces First Quarter 2009 Results 2Vasogen Announces First Quarter 2009 Results 3Vasogen Announces First Quarter 2009 Results 4Vasogen Announces First Quarter 2009 Results 5Vasogen Announces First Quarter 2009 Results 6Vasogen Announces First Quarter 2009 Results 7Vasogen Announces First Quarter 2009 Results 8Vasogen Announces First Quarter 2009 Results 9Rutgers University Cell and DNA Repository Adopts BioLife Solutions CryoStor(TM) as Standard Biopreservation Media 2Rutgers University Cell and DNA Repository Adopts BioLife Solutions CryoStor(TM) as Standard Biopreservation Media 3Cell Biosciences Announces Publication in Nature Medicine 2
... Designed to meet the needs ... animal component-free medium supports fast ... cell densities, while maintaining high ... protein production using the Baculovirus ...
... number is a new ... easily match Cornings product ... availability yet, please order ... number (Z36,327-8) or contact ...
Originally developed for the culture of Drosophila; suitable for culture of other dipteran cell lines. Powder, Insect cell culture tested...
... This CLS number is ... to easily match Cornings product ... yet, please order under the ... contact customer service for assistance. ...
Biology Products: