Navigation Links
Brain regions can take short naps during wakefulness, leading to errors
Date:4/27/2011

Madison, Wis. If you've ever lost your keys or stuck the milk in the cupboard and the cereal in the refrigerator, you may have been the victim of a tired brain region that was taking a quick nap.

Researchers at the University of Wisconsin-Madison have a new explanation. They've found that some nerve cells in a sleep-deprived yet awake brain can briefly go "off line," into a sleep-like state, while the rest of the brain appears awake.

"Even before you feel fatigued, there are signs in the brain that you should stop certain activities that may require alertness," says Dr. Chiara Cirelli, professor of psychiatry at the School of Medicine and Public Health. "Specific groups of neurons may be falling asleep, with negative consequences on performance."

Until now, scientists thought that sleep deprivation generally affected the entire brain. Electroencephalograms (EEGs) show network brain-wave patterns typical of either being asleep or awake.

"We know that when we are sleepy, we make mistakes, our attention wanders and our vigilance goes down," says Cirelli. "We have seen with EEGs that even while we are awake, we can experience shorts periods of 'micro sleep.' "

Periods of micro sleep were thought to be the most likely cause of people falling asleep at the wheel while driving, Cirelli says.

But the new research found that even before that stage, brains are already showing sleep-like activity that impairs them, she says.

As reported in the current issue of Nature, the researchers inserted probes into specific groups of neurons in the brains of freely-behaving rats. After the rats were kept awake for prolonged periods, the probes showed areas of "local sleep" despite the animals' appearance of being awake and active.

"Even when some neurons went off line, the overall EEG measurements of the brain indicated wakefulness in the rats," Cirelli says.

And there were behavioral conseque
'/>"/>

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

Page: 1 2

Related biology technology :

1. Towards zero training for brain-computer interfacing
2. Brain Cancer Patients at Two Leading Hospitals Treated Using Fast and Efficient RapidArc Radiotherapy Technology from Varian Medical Systems
3. Revealing the regulating mechanism behind signal transduction in the brain
4. OmniGuide Introduces The BeamPath Neuro(TM): A CO2 Laser Fiber for Brain And Spine Surgery
5. Delaware Man Spearheads Brain Tumor Awareness
6. Swedish Neuroscience Institute and Institute for Systems Biology in Seattle Form Alliance to Learn More about Brain Diseases
7. Swedish in Seattle Unveils State-of-the-Art Brain Tumor Center Combining Advanced Treatment With Innovation in Research
8. Brain and Hearing Pioneer, Michael Merzenich, Ph.D. to Speak at Case Western Reserve University
9. Scientists restore movement to paralyzed limbs through artificial brain-muscle connections
10. MedTechIQ Selects TheBrain to Visualize Expansive Biointellingence Database and Connect the Dots Between Life Sciences, Medicine and Venture Capital
11. The human brain minimizes energy expenditure and integrates gravity in to the action plan
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/23/2014)... Inc. (NASDAQ: SGMO ) today reported its ... For the second quarter ended June 30, 2014, ... or $0.10 per share, compared to a net loss ... same period in 2013. As of June 30, 2014, ... interest receivable of $236.7 million. Revenues for ...
(Date:7/23/2014)... the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), the Vienna University of ... succeeded in embedding nearly perfect semiconductor crystals into ... producing hybrid nanowires, very fast and multi-functional processing ... in the future. The research results will be ... , Nano-optoelectronics are considered the cornerstone of future ...
(Date:7/23/2014)... Columbia, MD (PRWEB) July 23, 2014 ... Station, an LC/MS amino acid analysis system developed ... analysis, the UF-Amino Station can analyze 38 amino ... , The UF-Amino Station achieves high-speed analysis utilizing ... spectrometer. The LCMS-2020 provides accurate analytical results even ...
(Date:7/23/2014)... de julio de 2014 ADB International ... ha anunciado hoy una asociación con Austen BioInnovation ... o el Instituto), para el propósito de llevar ... terapia de señal bioeléctrica (el E-QURE BST Device), ... que tiene una importante experiencia en cicatrización de ...
Breaking Biology Technology:Sangamo BioSciences Reports Second Quarter 2014 Financial Results 2Sangamo BioSciences Reports Second Quarter 2014 Financial Results 3Sangamo BioSciences Reports Second Quarter 2014 Financial Results 4Sangamo BioSciences Reports Second Quarter 2014 Financial Results 5Sangamo BioSciences Reports Second Quarter 2014 Financial Results 6Sangamo BioSciences Reports Second Quarter 2014 Financial Results 7Sangamo BioSciences Reports Second Quarter 2014 Financial Results 8Sangamo BioSciences Reports Second Quarter 2014 Financial Results 9A crystal wedding in the nanocosmos 2Shimadzu's New UF-Amino Station Provides High-Speed, Multi-Component Analysis of Amino Acids in Food & Beverage and Pharmaceutical Testing 2ADB International Group Inc. anuncia una asociación con Austen BioInnovation Institute 2ADB International Group Inc. anuncia una asociación con Austen BioInnovation Institute 3ADB International Group Inc. anuncia una asociación con Austen BioInnovation Institute 4ADB International Group Inc. anuncia una asociación con Austen BioInnovation Institute 5ADB International Group Inc. anuncia una asociación con Austen BioInnovation Institute 6
... Segment of Chemistry Testing Market, FULLERTON, ... BEC ) announced today that it ... clinical system, an integrated work cell which,consolidates ... The latest addition to the company,s work ...
... Calif., March 6 Senetek PLC (OTC,Bulletin Board: ... development,of technologies that target the science of healthy ... two Veteran Sales and Marketing Executives,and the appointment ... Campagnoli joined the Company in December and has ...
... Opens Facility to Support European Partnerships, ALAMEDA, ... today a collaboration with Novartis Pharma AG to ... through an,Erenna(TM) Technology Access Program (ETAP). Terms of ... announced the opening of a,facility in Paris, France ...
Cached Biology Technology:Beckman Coulter Releases the High-Volume UniCel(R) DxC 880i Integrated Work Cell 2Senetek PLC Announces Appointments of Key Personnel 2Senetek PLC Announces Appointments of Key Personnel 3Singulex Collaborates With Large Pharmaceutical Company in Erenna(TM) Technology Access Program 2
(Date:7/23/2014)... Roughly 780 million people around the world have no ... Health Organization (WHO), 3.4 million people die from water-related ... the goal of making a contribution to solving this ... Wendelin Stark, head of the Functional Materials Laboratory, the ... developing a prototype. , "What makes our DrinkPure filter ...
(Date:7/23/2014)... release is available in German . ... stability to cells, drive metabolic processes and transmit signals. ... three-dimensional shapes. Scientists at the Max Planck Institute for ... can be constructed of similar amino acid chains even ... the proteins that exist today arose from common precursors. ...
(Date:7/23/2014)... (PHILADELPHIA) The Worldwide Innovative Networking in personalized cancer ... Kimmel Cancer Center at Thomas Jefferson University ... the only member of this prestigious group in the ... the delivery of innovative personalized medicine to the patient ... patient advocacy. , "Our participation in the WIN consortium ...
Breaking Biology News(10 mins):ETH student develops filter for clean water around the world 2Protein evolution follows a modular principle 2New partnership brings more personalized cancer treatment to Philadelphia 2
... LIVERMORE, Calif. Outbreaks such as the severe acute ... have afflicted people around the world, yet many people ... the opposite is true. The efforts to combat ... Lawrence Livermore National Laboratory (LLNL) scientists. Led by Monica ...
... University of Colorado Cancer Center member recently published in ... that in young, female cancer survivors, quality of life ... 59 cancer survivors to 66 healthy controls and found ... anxiety than the general population. Of note, survivors reported ...
... the primary tumor that is deadly, but the spread or ... locations throughout the body that is the problem. That,s why ... stop or fight metastasis. Previous lab studies suggest ... they leave the primary tumor a process called epithelial-to-mesenchymal ...
Cached Biology News:LLNL scientists make new discoveries in the transmission of viruses between animals and humans 2Perception of fertility affects quality of life in young, female cancer survivors 2New evidence that cancer cells change while moving throughout body 2
... assay for mitochondrial membrane potential detection ... are detected by carboxyfluorescein (FAM)-labelled fluoromethylketone ... non-cytotoxic and bind covalently to the ... the same time the mitochondrial membrane ...
... DMEM and harvested at the log phase of ... in their native forms, cells were fixed in ... 12-well (5 mm) adhesive coated slide, with each ... and to minimize background staining. Each well ...
... The CopyControl™ vector can be induced prior ... vectors provide the stability of single-copy BACs ... or other cloning vectors. The kits provide ... reagents, insert size screening system) necessary to ...
... can be induced prior to DNA purification ... stability of single-copy BACs with the high ... vectors. The kits provide the linearized vector ... screening system) necessary to create a 10X ...
Biology Products: