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:5/19/2015)... 2015 Research and ... of the  "Genetic Testing Market Outlook 2018" ... , ,A recent report, Genetic Testing Market ... the current and future genetic testing market. ... working principles and types are covered in ...
(Date:5/14/2015)... , May 14, 2015  Verificient ... identity verification and online remote proctoring, announced ... software-as-a-service (SaaS) company and creator of the ... of the two companies will benefit from ... Canvas. As a fully integrated ...
(Date:5/11/2015)... -- Curemark LLC, a privately held drug research and ... III double blind, randomized, placebo-controlled clinical trial to examine ... children ages 3-8 with Autism. Previously, Curemark announced the ... clinical trial for CM-AT in children ages 3-8 with ... chymotrypsin. This new trial will help determine whether all ...
Breaking Biology News(10 mins):Global Genetic Testing Market Outlook 2018 2Verificient and Instructure Announce Alliance Partnership to Provide Online Proctoring for K-12 and Higher Education Institutions 2Curemark, LLC, Launches New Phase III Trial in Expanded Population of Children with Autism 2
(Date:5/27/2015)... , May 26, 2015 Research ... of the "Global Breast Cancer Monoclonal Antibodies ... Globally, Roche seems to dominate the ... inventory. Its block buster molecule, Herceptin has been ... It was found that breast cancer cells become ...
(Date:5/27/2015)... Fla. (PRWEB) May 27, 2015 Expanding ... dental cement manufacturer Avalon Biomed Inc. recently ... of Mokuda Dental Co. Ltd. , the largest ... inroad into the international market for Avalon Biomed, which ... Plus®, award-winning tricalcium silicate-based dental cements that have won ...
(Date:5/27/2015)... Israel , May 27, 2015  Tikcro Technologies ... quarter ended March 31, 2015. ... quarter, we continued pre-clinical work to generate functional specific ... an early stage, we are encouraged by the development ... field as new antibodies which modulate immune checkpoints gain ...
(Date:5/27/2015)... MB (PRWEB) May 27, 2015 ... data to combat disease, Cubresa Inc. today announced ... “Our MR Compatible in-bore PET Scanner uses silicon ... into single-purpose preclinical MRI machines from manufacturers like ... Cubresa, headquartered in Winnipeg, Canada. “This enables simultaneous ...
Breaking Biology Technology:Global Breast Cancer Monoclonal Antibodies Market Outlook 2020 2Global Breast Cancer Monoclonal Antibodies Market Outlook 2020 3Dental Manufacturer Avalon Biomed Inks Major Deal with Japanese Distributor 2Dental Manufacturer Avalon Biomed Inks Major Deal with Japanese Distributor 3Tikcro Technologies Reports First Quarter 2015 Results 2Tikcro Technologies Reports First Quarter 2015 Results 3Cubresa Launches Simultaneous PET/MRI Technology 2
Cached News: