Featured Research

from universities, journals, and other organizations

Adolescent Brains Show Reduced Reward Anticipation

Date:
February 25, 2004
Source:
NIH/National Institute On Alcohol Abuse And Alcoholism
Summary:
Adolescents show less activity than adults in brain regions that motivate behavior to obtain rewards, according to results from the first magnetic resonance imaging (MRI) study to examine real-time adolescent response to incentives. The study also shows that adolescents and adults exhibit similar brain responses to having obtained rewards.

Left: Young adults (age 22-28). Right: Adolescents (age 12-17) -- Credit: NIH/National Institute On Alcohol Abuse And Alcoholism

Adolescents show less activity than adults in brain regions that motivate behavior to obtain rewards, according to results from the first magnetic resonance imaging (MRI) study to examine real-time adolescent response to incentives. The study also shows that adolescents and adults exhibit similar brain responses to having obtained rewards. Researchers in the Laboratory of Clinical Studies of the National Institute on Alcohol Abuse and Alcoholism (NIAAA), one of the National Institutes of Health, conducted the study, which appears in the February 25 issue of the Journal of Neuroscience (Volume 24, Number 7).

"Understanding adolescent motivation is critical for understanding why so many young people drink alcohol and engage in associated behaviors such as drinking and driving and sexual risk-taking. That understanding also will be critical for shaping prevention messages that deter such behaviors," said Ting-Kai Li, M.D., Director, National Institute on Alcohol Abuse and Alcoholism. "With today's report, researchers in NIAAA's Laboratory of Clinical Studies provide an important part of the picture."

In the MRI study, James Bjork, Ph.D., and others in the laboratory of Daniel Hommer, M.D., scanned the brains of twelve adolescents aged 12 to 17 years and twelve young adults aged 22 to 28 years. While being scanned, the subjects participated in a game-like scenario risking monetary gain or loss. The participants responded to targets on a screen by pressing a button to win or avoid losing 20 cents, $1, or $5.

For both age groups, the researchers found that the anticipation of potential gain activated portions of the ventral striatum, right insula, dorsal thalamus, and dorsal midbrain, with the magnitude of ventral striatum activation sensitive to gain amount. In adolescents, however, the researchers found lower activation of the right ventral striatum centered in the nucleus accumbens, a region at the base of the brain shown by earlier research (see Alcohol Researchers Localize Brain Region That Anticipates Reward August 3, 2001 at News Releases-http://www.niaaa.nih.gov) to be crucial for motivating behavior toward the prospect of rewards.

"Our observations help to resolve a longstanding debate among researchers about whether adolescents experience enhanced reward from risky behaviors--or seek out alcohol and other stimuli because they require enhanced stimulation. They also may help to explain why so many young people have difficulty achieving long-term goals," according to James Bjork, Ph.D., first author on the study.

When the researchers examined brain activity following gain outcomes, they saw that in both adolescents and young adults monetary gain similarly activated a region of the mesial frontal cortex. "These results suggest that adolescents selectively show reduced recruitment of motivational but not consummatory components of reward-directed behavior," state the authors.


Story Source:

The above story is based on materials provided by NIH/National Institute On Alcohol Abuse And Alcoholism. Note: Materials may be edited for content and length.


Cite This Page:

NIH/National Institute On Alcohol Abuse And Alcoholism. "Adolescent Brains Show Reduced Reward Anticipation." ScienceDaily. ScienceDaily, 25 February 2004. <www.sciencedaily.com/releases/2004/02/040225070253.htm>.
NIH/National Institute On Alcohol Abuse And Alcoholism. (2004, February 25). Adolescent Brains Show Reduced Reward Anticipation. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2004/02/040225070253.htm
NIH/National Institute On Alcohol Abuse And Alcoholism. "Adolescent Brains Show Reduced Reward Anticipation." ScienceDaily. www.sciencedaily.com/releases/2004/02/040225070253.htm (accessed August 29, 2014).

Share This




More Mind & Brain News

Friday, August 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Treadmill 'trips' May Reduce Falls for Elderly

Treadmill 'trips' May Reduce Falls for Elderly

AP (Aug. 28, 2014) Scientists are tripping the elderly on purpose in a Chicago lab in an effort to better prevent seniors from falling and injuring themselves in real life. (Aug.28) Video provided by AP
Powered by NewsLook.com
Alice in Wonderland Syndrome

Alice in Wonderland Syndrome

Ivanhoe (Aug. 27, 2014) It’s an unusual condition with a colorful name. Kids with “Alice in Wonderland” syndrome see sudden distortions in objects they’re looking at or their own bodies appear to change size, a lot like the main character in the Lewis Carroll story. Video provided by Ivanhoe
Powered by NewsLook.com
Stopping Schizophrenia Before Birth

Stopping Schizophrenia Before Birth

Ivanhoe (Aug. 27, 2014) Scientists have long called choline a “brain booster” essential for human development. Not only does it aid in memory and learning, researchers now believe choline could help prevent mental illness. Video provided by Ivanhoe
Powered by NewsLook.com
Personalized Brain Vaccine for Glioblastoma

Personalized Brain Vaccine for Glioblastoma

Ivanhoe (Aug. 27, 2014) Glioblastoma is the most common and aggressive brain cancer in humans. Now a new treatment using the patient’s own tumor could help slow down its progression and help patients live longer. Video provided by Ivanhoe
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins