Navigation Links
Cocaine Use Dulls Brain's Sensitivity to Rewards

Findings suggest why even positive incentives don't help ease addiction

SUNDAY, Nov. 11 (HealthDay News) -- Cocaine addiction dulls the brain's sensitivity to even monetary rewards, U.S. researchers report.

A team at the U.S. Department of Energy's Brookhaven National Laboratory analyzed brain activity in 18 cocaine addicts and 18 age-matched healthy people.

The participants were outfitted with a cap of electrodes that measured brain activity as they pressed or didn't press buttons in response to visual prompts. During this task, the participants were told they could earn various amounts of money for fast and accurate performance.

The results showed that the cocaine addicts had a blunted brain response to the offer of a monetary reward.

The findings were presented Nov. 7 at the Society for Neuroscience annual meeting in San Diego.

"This altered sensitivity to reward may help explain why some drug-addicted individuals are unable to modify their drug-taking behavior, even in the face of well-understood negative consequences and/or positive incentives for behavioral change," Rita Goldstein, who runs the neuropsychoimaging lab at Brookhaven, said in a prepared statement.

In previous studies using functional magnetic resonance imaging, researchers in Goldstein's lab found similar compromised brain sensitivity to monetary reward in cocaine addicts.

"Individuals with such blunted neural and behavioral sensitivity to rewards may have a particularly difficult time responding to abstract incentives designed to motivate behavioral changes -- especially when outside of a structured treatment environment or when rewards are not readily available or clearly contingent on behavior," Goldstein said.

More information

The U.S. National Institute on Drug Abuse has more about cocaine.

-- Robert Preidt

SOURCE: Brookhaven National Laboratory, news release, Nov. 7, 2007

Copyright©2007 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. New treatment effective in counteracting cocaine-induced symptoms
2. Drug Detection Kits Manufactured By IDenta Corp. Shown During French Television Broadcast (at TF1) - Product Aids French Police In Bust of 600 Kilograms Of Cocaine
3. Smoking Dulls Taste for Sweets
4. Free will takes flight: how our brains respond to an approaching menace
5. Imaging Software Helps Track, Treat Injured Brains
6. New chemotherapy regimen prolongs survival in difficult-to-treat childhood brainstem gliomas
7. Rasheda Ali to Join Advisory Board of Brainstorm Cell Therapeutics
8. Sleepless Nights Make for Grumpier Brains
9. Sound training rewires dyslexic childrens brains for reading
10. Training, Experience Can Change How Brains Work
11. Scientists explain how insulin secreting cells maintain their glucose sensitivity
Post Your Comments:
(Date:11/28/2015)... , ... November 28, 2015 , ... Beginning November 30th at 6:00 a.m. EST until ... most savings. , With possible savings of up to 20% off orders $80 or more ... of the website every few hours. , As a competitive e-commerce website for skin care ...
(Date:11/27/2015)... CO (PRWEB) , ... November 27, 2015 , ... According ... cities are not changing the way that they are handling security in light of ... police and security presence in an attempt to stop an attack from reaching U.S. ...
(Date:11/27/2015)... County, CA (PRWEB) , ... November 27, 2015 , ... ... season , The company is offering customers 10% off of their purchase of lice ... any treatment at full price. According to a company spokesperson. “Finding lice is a ...
(Date:11/27/2015)... ... November 27, 2015 , ... ... well-respected Microsoft Dynamics SL User Group (MSDSLUG). Recognized as Microsoft’s official group for ... of Microsoft Dynamics SL software users, partners, industry experts and representatives. Intellitec Solutions’ ...
(Date:11/27/2015)... ... November 27, 2015 , ... The men and women on ... organizations in the country. They have overseen financial turnarounds, shown commitment to their ... healthcare industry as a whole through their advocacy and professional efforts. , Becker's ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... 2015 Research and Markets ( ) ... Care Market by Type (Dressings, Therapy Devices, Active Wound ... Out-Patient Facility), and Geography - Global Forecast to 2020" ... --> --> The purpose of this ... of the global advanced wound care market. It involves ...
(Date:11/26/2015)... DUBLIN , Nov. 26, 2015 ... the addition of the "2016 Future Horizons ... Monitoring (TDM) Market: Supplier Shares, Country Segment Forecasts, ... offering. --> ... comprehensive analysis of the Italian therapeutic drug monitoring ...
(Date:11/25/2015)... SYDNEY , Nov. 26, 2015  The total global ... nearly 7% over 2015-2016. Latin America ... Asia , (excluding Japan ), is ... continues to face increased healthcare expenditure. In 2013-2014, ... expenditure declined from 43.5% in 2008-2009 to 41.2% in 2013-2014. ...
Breaking Medicine Technology: