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:
(Date:6/17/2015)... Germany , June 17, 2015 ... today launched new Investigator ® STR assay kits for ... the United States . The new genetic fingerprint kits ... markers (short tandem repeats or STRs) for DNA matching. They ... quality of DNA in each sample, a novel QIAGEN technology ...
(Date:6/16/2015)... Fingerprint Cards has received an order of 375 ... from one of its module partners in Asia ... the third quarter 2015. The sensors will be used by ... Jörgen Lantto, CEO of FPC, comments: " This order   ... smartphone OEMs in integrating touch fingerprint sensors in   their ...
(Date:6/12/2015)... DALLAS , June 12, 2015  Securus ... justice technology solutions for public safety, investigation, corrections ... issued its patent to electronically capture, analyze and ... various facial recognition methods. This system ... authorized by an enrollment and subsequent sign-on process ...
Breaking Biology News(10 mins):QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 2QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 3QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 4QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 5FPC Receives Order for Touch Fingerprint Sensors of 375 MSEK 2Securus Announces Patent Issued for Authorized Presence Verification During Video Visitation 2
(Date:7/3/2015)... , July 3, 2015 ... for Open Innovation in Science", som finner ... Søknadene sendes på nett, på  http://www.openinnovationinscience.at , ... 2015.  De to største utfordringene ... å undersøke nye forskningsspørsmål og kompleksiteten av ...
(Date:7/2/2015)... GLEN ELLYN, Ill. , July 2, 2015 /PRNewswire-USNewswire/ ... and Colton Eakins are gaining invaluable real-world ... Institute of Technology this summer. The students ... Dr. Jeff Wereszczynski,s research group at IIT. ... Professors Dr. Tom Carter , Physics; Dr. ...
(Date:7/2/2015)... (PRWEB) , ... July 02, 2015 , ... ... development and manufacturing of surgical instruments in Orthopedics, announced today the acquisition of ... and the world's largest provider of surgical instruments to the Spine Industry. The ...
(Date:7/1/2015)... ... 01, 2015 , ... The next-generation sequencing (NGS) clinical market is poised for ... diagnostics industry. BCC Research reveals in its new report that the market drivers of ... a growing need for better diagnostics as part of a molecular diagnostics trend. , ...
Breaking Biology Technology:Lansering av verdens første Open Innovation-program for utdanning av forskere 2Lansering av verdens første Open Innovation-program for utdanning av forskere 3COD Students Participate in Prestigious Summer Internships 2In'Tech Medical Acquires Turner Medical to Become a World Leader in Orthopedic Contract-Manufacturing 2In'Tech Medical Acquires Turner Medical to Become a World Leader in Orthopedic Contract-Manufacturing 3NGS-Based Diagnostics, the ‘Must-Have Platform’, Sends Market Segment CAGRs Soaring According to BCC Research 2NGS-Based Diagnostics, the ‘Must-Have Platform’, Sends Market Segment CAGRs Soaring According to BCC Research 3
Cached News: