Navigation Links
Sleep-Deprived Brains Show Lapse in Visual Processing
Date:5/20/2008

Seemingly normal function could give false sense of competence, study suggests

TUESDAY, May 20 (HealthDay News) -- Sleep deprivation can affect your ability to make sense of what you see, a study by neuroscience researchers at the Duke-NUS Graduate Medical School in Singapore shows.

Using MRI to measure blood flow in the brains of volunteers, the researchers found that even after sleep deprivation, participants had periods of near-normal brain function in which they were able to complete tasks quickly. However, periods of slow response and severe declines in visual processing were mixed in with these periods of normalcy.

"Interestingly, the team found that a sleep-deprived brain can normally process simple visuals, like flashing checkerboards. But the 'higher visual areas' -- those that are responsible for making sense of what we see -- didn't function well. Herein lies the peril of sleep deprivation," study author Dr. Michael Chee, a professor of the neurobehavioral disorders program at Duke-NUS, said in a prepared statement.

During these slow visual responses, the volunteers showed significant reductions in their higher visual cortex activity. At the same time, their frontal and parietal "control regions" were less able to make their usual connections.

The mixture of sleep deprivation-related cognitive lapses and near normalcy demonstrate the competing effects of trying to remain awake while the brain is trying to power down for sleep, when it ordinarily becomes less responsive to sensory stimuli, Chee said.

The study, published in the May 21 issue of the Journal of Neuroscience, has implications for the many people who work night shifts.

"The periods of apparently normal functioning could give a false sense of competency and security, when in fact, the brain's inconsistency could have dire consequences," Chee said.

"The study task appeared simple, but as we showed in previous work, you can't effectively memorize or process what you see if your brain isn't capturing that information," Chee noted. "The next step in our work is to see what we might do to improve things, besides just offering coffee, now that we have a better idea of where the weak links in the system are."

More information

The National Sleep Foundation has more about shift work and sleep.



-- Robert Preidt



SOURCE: Duke University, news release, May 20, 2008


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Protein Nasal Spray Revives Sleep-Deprived Monkeys
2. Analysis of alcoholics brains suggests treatment target
3. Yeast gives rise to new concept: cell fuel is brains behind division
4. AgeLab Director Brings Wisdom to Aging Brains
5. Are teenage brains really different?
6. Which came first, social dominance or big brains? Wasps may tell
7. Chicago neuroscientist contributes to book on brains and baseball
8. Aging Brains Get Out of Sync
9. Autistic Children Have More Gray Matter in Brains
10. Novel imaging technique shows gray matter increase in brains of autistic children
11. Novel Imaging Technique Shows Gray Matter Increase in Brains of Autistic Children
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/5/2016)... Toronto, Ontario (PRWEB) , ... February 05, 2016 , ... ... the Scarborough General Hospital Burn Unit, plastic and cosmetic surgeon Dr. Wayne Carman transitioned ... the Scarborough Hospital. He successfully completed his first three-year term as chief and began ...
(Date:2/5/2016)... ... 2016 , ... In the fourth quarter of 2015, document ... La Valencia Hotel in San Diego, California to discuss changes in the industry ... outstanding franchise, walking away with the coveted David Wright Award of Excellence. ...
(Date:2/5/2016)... Texas (PRWEB) , ... February 05, 2016 , ... ... to allow users to search for and donate to Give To Cure’s campaign that ... an app that lets users make and share payments through a smart device. In ...
(Date:2/5/2016)... New York, New York (PRWEB) , ... February 05, 2016 , ... ... (APDA) announced the election of Patrick McDermott as Chairman of the National Board of ... welcome Pat as Chairman of the Board,” stated Leslie A. Chambers , APDA ...
(Date:2/5/2016)... CA (PRWEB) , ... February 05, 2016 , ... ... and founder of CitiDent, announces that it is now welcoming orthodontist, Dr. ... Cheng, CitiDent offers a complete range of oral health care, including general dentistry, ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... -- ivWatch, a medical devices company, is one of five recipients ... Terry McAuliffe,s office. ivWatch will be receiving the ... event to be held at the Science Museum of ... business that have made significant contributions to science. ... ...
(Date:2/5/2016)... 2016  Patients in Alabama seeking ... therapy no longer have to travel out of state. ... Urology Centers of Alabama to provide a total ... qualifying patients. Alabama is ... of prostate cancer using many different modalities. They are the ...
(Date:2/5/2016)... Feb. 5, 2016 ... of the "Global Musculoskeletal Partnering 2010-2016: ... profile to their offering. --> ... of the "Global Musculoskeletal Partnering 2010-2016: ... profile to their offering. --> ...
Breaking Medicine Technology: