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:6/25/2016)... ... ... The temporary closing of Bruton Memorial Library on June 21 due to a possible lice ... overlooked aspect of head lice: the parasite’s ability to live away from a human host, ... a necessary one in the event that lice have simply gotten out of control. , ...
(Date:6/25/2016)... ... ... As a lifelong Southern Californian, Dr. Omkar Marathe earned his Bachelors in ... School of Medicine at UCLA. He trained in Internal Medicine at Scripps Green Hospital ... at the UCLA-Olive View-Cedars Sinai program where he had the opportunity to train in ...
(Date:6/25/2016)... ... 2016 , ... Conventional wisdom preaches the benefits of moderation, whether it’s a ... the bar too high can result in disappointment, perhaps even self-loathing. However, those who ... , Research from PsychTests.com reveals that behind the tendency to set ...
(Date:6/24/2016)... ... June 24, 2016 , ... June 19, 2016 is World Sickle Cell ... pain and the benefits of holistic treatments, Serenity Recovery Center of Marne, ... Cell Disease. , Sickle Cell Disease (SCD) is a disorder of the red blood ...
(Date:6/24/2016)... Fla. (PRWEB) , ... June 24, 2016 , ... Global ... Trend magazine’s 2016 Legal Elite. The attorneys chosen by their peers for this recognition ... Florida. , Seven Greenberg Traurig Shareholders received special honors as members of this year’s ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016  Collagen Matrix, Inc., ... development and manufacturing of collagen and mineral based ... today that Bill Messer has joined ... to further leverage the growing portfolio of oral ... Bill joins the Collagen Matrix executive ...
(Date:6/24/2016)... , June 24, 2016 ... of the "Structural Electronics 2015-2025: Applications, Technologies, ... In-Mold Electronics, Smart Skin, ... Photovoltaics Structural electronics involves electronic ... load-bearing, protective structures, replacing dumb structures such as ...
(Date:6/24/2016)... June 24, 2016 Research and Markets ... for Companion Diagnostic Tests" report to their offering. ... Companion Diagnostics The World Market for Companion ... medicine diagnostics. Market analysis in the report includes the following: ... (In Vitro Diagnostic Kits) by Region (N. America, EU, ROW), ...
Breaking Medicine Technology: