HOME >> BIOLOGY >> NEWS
Worth the wait? A neural mechanism related to impulsive decision-making

Researchers at the Ruhr-University Bochum in Germany and the University of Otago in Dunedin, New Zealand, have identified single neurons in the pigeon forebrain that play a role in controlling impulsive decisions--in the pigeons' case, the preference for a small, immediate reward over a large, delayed reward.

In contrast to assumptions made by many economic theories, decisions by humans and other animals are often not rational, and their actions are not always exclusively directed toward the maximization of gain. A prominent example of such sub-optimal choice behavior is impulsive decision-making, in which case an immediate but disadvantageous reward may be preferred over a delayed but more advantageous reward.

In their new work, Tobias Kalenscher and colleagues trained pigeons to choose between a small and a large reward. At the beginning of a session, both rewards were delivered immediately after the choice was made, but the delivery of a large reward was increasingly delayed as the session progressed. At first, pigeons preferred the large reward, but once the preceding delay exceeded a critical threshold of duration, they switched to preferring the small but fast reward. Reward preference in this task therefore depended on both reward amount and time-to-reward. Using single-cell electrophysiological recordings from freely moving pigeons, the authors provided evidence that single neurons in the avian forebrain showed increased activity in anticipation of an upcoming reward. This reward-related activation was greater when the pigeons expected a large reward than when they expected a small one. But most importantly, the degree of activation decreased as the delay between the choice and the large reward increased, until this degree of activation dropped below that of activation related to the expectance of a small reward. This drop in neural activation coincided with the pigeons' preference shift from the large, delayed reward to the small, fast rewar
'"/>

Contact: Heidi Hardman
hhardman@cell.com
1-617-397-2879
Cell Press
11-Apr-2005


Page: 1 2

Related biology news :

1. Regulating alternative splicing during neural development
2. New insights into the neural basis of anxiety
3. Left-right wiring determined by neural communication in the embryonic worm
4. Neuronal differentiation of human neural stem cell grafts in adult rat spinal cord
5. Detailed 3-D image catches a key regulator of neural stem cell differentiation in action
6. Mysterious neural noise actually primes brain for peak performance
7. Dartmouth researchers find a neural signature of bilingualism
8. Making a face: A new and earlier marker of neural crest development
9. Carnegie Mellon study identifies impact of neural connections in learning process
10. New insights into neural tube defects
11. Figuring out the ups and downsand sidewaysof neural development

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Worth the wait neural mechanism related impulsive decision making

(Date:4/15/2014)... CLEVELAND, Ohio (April 16, 2014)A new study from the ... vitamin D levels and menopause symptoms. The study was ... of The North American Menopause Society., The authors analyzed ... and a number of menopause symptoms, including hot flashes, ... women who participated in the calcium and vitamin D ...
(Date:4/15/2014)... in Greenbelt, Md., is home to hundreds of ... Goddard, some of the most cutting-edge Earth science ... that cutting-edge innovation has earned a Goddard scientist ... for Anthropology and Geography awards the Vega Medal ... shown excellence in the fields of physical geography, ...
(Date:4/15/2014)... Missouri researchers have previously shown that a genetic pre-disposition ... In a new study, Frank Booth, a professor in ... potential link between the genetic pre-disposition for high levels ... maturation occurs. , For his study, Booth selectively bred ... extreme laziness. Booth then put the rats in cages ...
Breaking Biology News(10 mins):Low Vitamin D may not be a culprit in menopause symptoms 2Goddard scientist receives Vega Medal from King of Sweden 2Genetic pre-disposition toward exercise and mental development may be linked 2
(Date:1/15/2014)... 2014 The Microcompetition with Foreign DNA ... disease. One of these latent viruses is the Epstein ... rheumatoid arthritis (RA). Rheumatoid arthritis (RA) is a chronic ... by the theory, a study found that RA patients ... (1). , What is Microcompetition? , Dr. Hanan ...
(Date:1/15/2014)... Sunnyvale, CA (PRWEB) January 15, 2014 ... of high throughput research solutions, today announced that ... companies, has received delivery of Freeslate’s CM ... form screening. , Lupin, headquartered in Mumbai, ... quality, affordable generic and branded formulations and Active ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Date: Friday, ... p.m. , Location: Warrington Country Club, 1360 Almshouse Road, ... Foundation, the only national nonprofit organization solely dedicated to ... quality of life for those affected worldwide, will host ... Warrington Country Club in Warrington, Pa. , Each ...
(Date:1/14/2014)... , Jan. 14, 2014  3D Communications, a leading provider ... major scientific, regulatory, business, and media events in ... , today announced its former associate Virginia Cox , ... office. Virginia Cox re-joins ... Commissioner for the Office of External Affairs at the U.S. ...
Breaking Biology Technology:Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Former FDA Associate Commissioner Returns To 3D Communications 2
Cached News: