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:5/26/2016)... ... May 26, 2016 , ... Leadership of ... today announced the organization has earned its ISO 13485 certification, indicating the company’s ... with all rules and policies associated with ISO quality standard 13485. , ...
(Date:5/26/2016)... ... May 26, 2016 , ... The Lung Institute has partnered ... cessation class starting June 6 at their clinic in downtown Tampa. The class is ... the Lung Institute has created a free downloadable 4 Week Smoking Cessation Guide ...
(Date:5/26/2016)... (PRWEB) , ... May 26, 2016 , ... ... offering campers a multitude of activities from daily practices, arts & crafts, discussions, ... Camp Directors Amber East-D’Anna and Christy Evans have combined backgrounds in kids’ yoga, ...
(Date:5/26/2016)... ... May 26, 2016 , ... The MIAMI Institute for Age ... speaker Dr. Adonis Maiquez MD, ABAARM. Dr. Adonis , Wellness Physician of the ... a member of the Institute for Functional Medicine. , He also heads up FITTLab, ...
(Date:5/26/2016)... ... 2016 , ... Power Systems, a leading developer and supplier ... Course in Stoughton, Massachusetts. The course was led by Power Systems’ Education Coordinator, ... interactive course to qualify participants as certified PowerWave trainers. , PowerWave is ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... India , May 25, 2016 ... Animation Market by Type (3D, 2D, 4D), by Therapeutic ... Education), by End User (Medical Device Manufacturers, Hospitals/ Clinics) ... studies the global Medical Animation Market for the forecast ... to reach USD 301.3 Million by 2021 from USD ...
(Date:5/25/2016)... 2016  According to Kalorama Information, the world ... 2015.  Though these are challenging times in the ... success for companies that remain optimistic and seek ... growth prospects medical device companies spend a higher ... (R&D) than do companies in other industries.  Also, ...
(Date:5/25/2016)... , May 25, 2016 Digital ... issuance to it by the US Patent and ... company,s technology includes proprietary processes for electronic opt-­in ... health and wellness programs, HIPAA compliance and otherwise. ... "Our technology allows ...
Breaking Medicine Technology: