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:10/12/2017)... ... October 12, 2017 , ... ... sleep apnea using cutting-edge Oventus O2Vent technology. As many as 18 ... characterized by frequent cessation in breathing. Oral appliances can offer significant relief to ...
(Date:10/12/2017)... CITY, Fla. (PRWEB) , ... October 12, 2017 , ... ... cold therapy products, announced today the introduction of an innovative new design of the ... multipurpose pad so you get maximum comfort while controlling your pain while using cold ...
(Date:10/12/2017)... ... 12, 2017 , ... Information about the technology: , Otomagnetics ... enable prevention of a major side effect of chemotherapy in children. Cisplatin and ... For cisplatin, hearing loss is FDA listed on-label as a dose limiting toxicity. ...
(Date:10/12/2017)... ... ... Leading pediatric oncology experts at Children’s National Health System will join ... International Society of Paediatric Oncology (SIOP) Oct. 12-15. Chaired by Jeffrey Dome, ... at Children’s National, and Stephen P. Hunger, M.D., Chief of the Division of ...
(Date:10/12/2017)... ... 2017 , ... Health Literacy Innovations (HLI), creator of the ... the Cancer Patient Education Network (CPEN), an independent professional organization that shares best ... alliance. , As CPEN’s strategic partner, HLI will help support CPEN members ...
Breaking Medicine News(10 mins):
(Date:10/10/2017)... , Oct. 10, 2017   West Pharmaceutical ... innovative solutions for injectable drug administration, today shared the ... ID Adapter for improving the intradermal administration of polio ... Skin Vaccination Summit in May 2017 by Dr. ... Polio Department, World Health Organization (WHO), and recently published ...
(Date:10/4/2017)... 2017  According to the Centers for Disease Control and Prevention (CDC), ... PhysicianOne Urgent Care is helping communities across Massachusetts , ... by offering no-cost* flu shots through the end of the month. ... insurance regulations. ... get a flu shot is by the end of October, according to ...
(Date:10/2/2017)... , Oct. 2, 2017  AllianceRx Walgreens Prime, the ... by Walgreens and pharmacy benefit manager Prime Therapeutics LLC ... brand, which included the unveiling of new signage at ... as well as at a few other company-owned facilities ... brand to patients, some of whom will begin to ...
Breaking Medicine Technology: