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:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... while ... ... TSX symbol: SBS, CALGARY, March 17 /PRNewswire-FirstCall/ - SemBioSys Genetics ... and cardiovascular diseases, today announced its,operational and financial results for the ...
... measuring airway inflammation poised to ... for improved control., MENLO PARK, Calif., March 17 ... Insight eNO system has received,clearance to market by the ... system measures exhaled nitric oxide (eNO), which is a,well-established ...
... 17 , - New Executives Appointed in ... Development Towards Commercialization, QuoNova LLC, which is ... in the global fight against bacterial,infection and damage ... executives in global roles to support its next ...
Cached Biology Technology:SemBioSys announces 2007 financial and operational results 2SemBioSys announces 2007 financial and operational results 3SemBioSys announces 2007 financial and operational results 4SemBioSys announces 2007 financial and operational results 5SemBioSys announces 2007 financial and operational results 6SemBioSys announces 2007 financial and operational results 7SemBioSys announces 2007 financial and operational results 8SemBioSys announces 2007 financial and operational results 9SemBioSys announces 2007 financial and operational results 10SemBioSys announces 2007 financial and operational results 11SemBioSys announces 2007 financial and operational results 12SemBioSys announces 2007 financial and operational results 13Apieron, Inc. Announces FDA Clearance of the Insight(TM) eNO System to Assist Physicians with Patient Asthma Management 2Apieron, Inc. Announces FDA Clearance of the Insight(TM) eNO System to Assist Physicians with Patient Asthma Management 3QuoNova Global Executive Appointments 2QuoNova Global Executive Appointments 3QuoNova Global Executive Appointments 4
(Date:12/22/2014)... , Dec. 22, 2014  NXT-ID, Inc. (NASDAQ: ... a biometric authentication company focused on the growing mobile ... and security consultant, Apollo Robbins for the ... wallet.  Apollo Robbins will ... th , 2015, demonstrating some of his famous theft ...
(Date:12/19/2014)... 18, 2014 Research and Markets ( ... "Micro Market Monitor: North America Perimeter Security Systems Market" ... http://photos.prnewswire.com/prnh/20130307/600769 The North American perimeter ... of 3.6% from 2014 to 2019. Although the U.S. ... Canada is expected to grow at ...
(Date:12/17/2014)... FORT BELVOIR, Va. , Dec. 15, 2014 ... its efforts to make it easier to detect ... supply chain. Today the agency started ... marking. The capability will validate the authenticity of ... supply chain. The new quality control measures will ...
Breaking Biology News(10 mins):NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 4Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3
... has shown for the first time that sulforaphane, the powerful ... compound by bacteria in the lower gut and absorbed into ... will be able to enhance the activity of these bacteria ... a U of I professor of human nutrition. "It,s ...
... PARK, Md. - Offshore wind power offers a feasible ... goals, but presents some economic and political hurdles, concludes ... for Integrative Environmental Research (CIER). The study, " ... feasibility assessment to date of developing and operating wind ...
... Central Africa 65 million years ago was a low-elevation tropical ... region,s mammals browsed and hunted beneath the canopy of a ... at that time is weak and far from convincing, says ... Fossil pollen from Central and West Africa provide no ...
Cached Biology News:Discovery may help scientists boost broccoli’s cancer-fighting power 2Offshore wind a 'mixed bag': University of Maryland study 2Offshore wind a 'mixed bag': University of Maryland study 3Evidence is weak for tropical rainforest 65 million years ago in Africa's low-latitudes 2Evidence is weak for tropical rainforest 65 million years ago in Africa's low-latitudes 3
...
MarrowMAX Bone Marrow Medium...
Sprague-Dawley rats, 7-8 weeks old, mixed gender; tissue is collected fresh, frozen on dry ice within minutes of sacrifice and stored at -20C; individual tissue weight approx. 0.05 gram....
CMRL Medium-1066 (1X) liquid...
Biology Products: