facebook
twitter
rss
account
search
search
 

'Reward' center responds to bad times, too

Feb. 23, 2011 at 12:14 AM   |   Comments

AUGUSTA, Ga., Feb. 22 (UPI) -- The brain's so-called reward center may need a new name, because U.S. scientists show it responds to both good and bad experiences.

Dr. Joe Z. Tsien, co-director of Georgia Health Sciences University's Brain & Behavior Discovery Institute, says eating chocolate or falling off a building -- or just thinking of either -- can evoke production of dopamine, a neurotransmitter that can make the heart race and motivate behavior.

The finding, published in the journal PLoS One, may help explain the "thrill" of thrill-seeking behavior or maybe just the thrill of surviving.

In a study using mice, the researchers looked at dopamine neurons in the part of the brain related to reward motivation or drug addiction. They found all the cells had some response to good or bad experiences while a fearful event excited about 25 percent of the neurons -- spurring more dopamine production.

"We have believed that dopamine was always engaged in reward and processing the hedonic feeling," Tsien says in a statement. "What we have found is that dopamine neurons also are stimulated or respond to negative events."

© 2011 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Recommended UPI Stories
Most Popular
1
New research explains insomnia prevalence among elderly
2
New data shows Melbourne is most well-rested city in the world
3
Yoga guru BKS Iyengar dies at 95
4
New research details rare cancer that killed Bob Marley
5
Daughters more likely than sons to care for elder parents
Trending News
Video
x
Feedback