HOME >> BIOLOGY >> NEWS
Brain differences in adolescents, psychopaths, lend to their impulsive, risk-taking behavior

ficity for targeting brain regions heavily innervated by the midbrain dopamine system. Other recent research has suggested that dopamine may play a role in the learning of behaviors associated with reward and pleasure. Consistent with this view, the model demonstrated that when the rewards were administered in an unpredictable manner, a key reward structure of the brain--the striatum--was more active, suggesting that "reward" to the brain may have more to do with the predictability of an event than with how pleasurable it is.

"These studies suggest that adolescent decisions may, in part, be due to a greater biological sensitivity to either rewards themselves or, more likely, the novelty of rewards," says Berns. "It is possible that a reward or novelty associated with the reward may trigger hyperactivity in still developing brain reward structures and circuits."

Another study found differences in risk-taking behaviors in pubescent rats. Georgia Hodes, a graduate student at Rutgers University working with Tracey J. Shors, PhD, used an elevated plus maze to study exploratory behavior of male and female rats before, during, and after puberty. The maze contained "safe" (closed and darker) areas and more "anxiety-provoking" (open and exposed) areas. The researchers analyzed videotapes of rats as they maneuvered freely through the maze during 10-minute sessions. The elevated plus maze is a task used to measure anxiety, which is created by the conflict between the animal's desire to explore and its fear of open spaces. An animal's entering the exposed areas of the maze indicates lower anxiety, while extension of the rat's head into the open area without actually entering it (stretched attenuated posture) indicates assessment of risk.

The researchers found that both male and female pubescent rats were more likely to enter and spent more time in the open and exposed areas than did the adult male and female rats, suggesting that
'"/>

Contact: Leah Ariniello
dawn@sfn.org
202-462-6688
Society for Neuroscience
24-Oct-2004


Page: 1 2 3 4 5

Related biology news :

1. Brain blood flow gives clues to treating depression
2. Brains hearing center may reorganize after implant of cochlear device
3. Brains inertial navigation system pinpointed
4. Brain, size and gender surprises in latest fossil tying humans, apes and monkeys
5. Brains reflect sex differences
6. Brain networks strengthened by closing ion channels
7. Brain tumors coax important support from nearby immune system cells
8. Brain tissue reveals possible genetic trigger for schizophrenia
9. Brain fends off distractions
10. Brain works more chaotically than previously thought
11. Brain maps online

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/21/2016)... , March 22, 2016 ... recognition with passcodes for superior security   ... a leading provider of secure digital communications services, today ... biometric technology and offer enterprise customers, particularly those in ... facial recognition and voice authentication within a mobile app, ...
(Date:3/14/2016)... Florida , March 14, 2016 ... the growing mobile commerce market, announces the airing of a ... channels starting the week of March 21 st .  The ... CNBC, including its popular Squawk on the Street show. ... focused on the growing mobile commerce market, announces the airing ...
(Date:3/10/2016)...   Unisys Corporation (NYSE: UIS ) today ... is testing its biometric identity solution at the Otay Mesa ... help identify certain non-U.S. citizens leaving the country. ... help determine the efficiency and accuracy of using biometric technologies ... run until May 2016. --> the United ...
Breaking Biology News(10 mins):
(Date:5/23/2016)... ... May 23, 2016 , ... PrecisionAg® Media has ... 2017 and Beyond. The paper outlines the key trends that are creating both ... “We’ve witnessed a lot of highs and lows as the precision agriculture market ...
(Date:5/23/2016)... ... May 23, 2016 , ... Foresight Institute , a ... winners for the 2015 Foresight Institute Feynman Prizes. , These prestigious prizes, ... one for experiment and the other for theory in nanotechnology. Prof. Markus J. ...
(Date:5/20/2016)... ... ... The recent recall by Costco and Trader Joes of 47 million pounds of ... demonstrates the need for faster and more cost effective bio-threat detection to ensure food ... , PathSensor’s latest solution uses a biosensor technology called CANARY®. CANARY®, an ...
(Date:5/19/2016)... 2016 Regen BioPharma, ... RGBPP) announced today initiation of a preclinical development ... based cancer immunotherapeutic product leveraging its NR2F6 immunological ... a generation of cord blood derived killer cells ...  The product in development will be a "universal ...
Breaking Biology Technology:
Cached News: