Featured Research

from universities, journals, and other organizations

Brain study: Adolescents' brains respond differently than adults' when anticipating rewards

Date:
January 17, 2012
Source:
University of Pittsburgh
Summary:
Teenagers are more susceptible to developing disorders like addiction and depression, according to a new article.

Teenagers are more susceptible to developing disorders like addiction and depression, according to a paper recently published by Pitt researchers in the Proceedings of the National Academy of Science.

Related Articles


The study was led by Bita Moghaddam, coauthor of the paper and a professor of neuroscience in Pitt's Kenneth P. Dietrich School of Arts and Sciences. She and coauthor David Sturman, a MD/PhD student in Pitt's Medical Scientist Training Program, compared the brain activity of adolescents and adults in rats involved in a task in which they anticipated a reward. The researchers found increased brain cell activity in the adolescent rats' brains in an unusual area: the dorsal striatum (DS) -- a site commonly associated with habit formation, decision-making, and motivated learning. The adult rats' DS areas, on the other hand, did not become activated by an anticipated reward.

"The brain region traditionally associated with reward and motivation, called the nucleus accumbens, was activated similarly in adults and adolescents," said Moghaddam. "But the unique sensitivity of adolescent DS to reward anticipation indicates that, in this age group, reward can tap directly into a brain region that is critical for learning and habit formation."

Typically, researchers study the correlation between different behaviors of adolescents and adults. The Pitt team, however, used a method they call "behavioral clamping" to study if the brains of adolescents process the same behavior differently. To that end, the researchers implanted electrodes into different regions of rat adolescent and adult brains, allowing the researchers to study the reactions of both individual neurons and the sum of the neurons', or "population," activity.

The researchers' predictions proved accurate. Even though the behavior was the same for both adult and adolescent rats, the researchers observed age-related neural response differences that were especially dramatic in the DS during reward anticipation. This shows that not only is reward expectancy processed differently in an adolescent brain, but also it can affect brain regions directly responsible for decision-making and action selection.

"Adolescence is a time when the symptoms of most mental illnesses -- such as schizophrenia and bipolar and eating disorders -- are first manifested, so we believe that this is a critical period for preventing these illnesses," Moghaddam said. "A better understanding of how adolescent brain processes reward and decision-making is critical for understanding the basis of these vulnerabilities and designing prevention strategies."

The Pitt team will continue to compare adolescent and adult behavior, especially as it relates to stimulants -- such as amphetamines -- and their influence on brain activity.

The National Institute of Mental Health funded this project.


Story Source:

The above story is based on materials provided by University of Pittsburgh. Note: Materials may be edited for content and length.


Journal Reference:

  1. D. A. Sturman, B. Moghaddam. Striatum processes reward differently in adolescents versus adults. Proceedings of the National Academy of Sciences, 2012; 109 (5): 1719 DOI: 10.1073/pnas.1114137109

Cite This Page:

University of Pittsburgh. "Brain study: Adolescents' brains respond differently than adults' when anticipating rewards." ScienceDaily. ScienceDaily, 17 January 2012. <www.sciencedaily.com/releases/2012/01/120117144320.htm>.
University of Pittsburgh. (2012, January 17). Brain study: Adolescents' brains respond differently than adults' when anticipating rewards. ScienceDaily. Retrieved January 26, 2015 from www.sciencedaily.com/releases/2012/01/120117144320.htm
University of Pittsburgh. "Brain study: Adolescents' brains respond differently than adults' when anticipating rewards." ScienceDaily. www.sciencedaily.com/releases/2012/01/120117144320.htm (accessed January 26, 2015).

Share This


More From ScienceDaily



More Mind & Brain News

Monday, January 26, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How Technology Is Ruining Snow Days For Students

How Technology Is Ruining Snow Days For Students

Newsy (Jan. 25, 2015) More schools are using online classes to keep from losing time to snow days, but it only works if students have Internet access at home. Video provided by Newsy
Powered by NewsLook.com
Weird Things Couples Do When They Lose Their Phone

Weird Things Couples Do When They Lose Their Phone

BuzzFeed (Jan. 24, 2015) Did you back it up? Do you even know how to do that? Video provided by BuzzFeed
Powered by NewsLook.com
Smart Wristband to Shock Away Bad Habits

Smart Wristband to Shock Away Bad Habits

Reuters - Innovations Video Online (Jan. 23, 2015) A Boston start-up is developing a wristband they say will help users break bad habits by jolting them with an electric shock. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Amazing Technology Allows Blind Mother to See Her Newborn Son

Amazing Technology Allows Blind Mother to See Her Newborn Son

RightThisMinute (Jan. 23, 2015) Not only is Kathy seeing her newborn son for the first time, but this is actually the first time she has ever seen a baby. Kathy and her sister, Yvonne, have been legally blind since childhood, but thanks to an amazing new technology, eSight glasses, which gives those who are legally blind the ability to see, she got the chance to see the birth of her son. It&apos;s an incredible moment and an even better story. Video provided by RightThisMinute
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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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