Navigation Links
Gambling monkeys give insight into neural machinery of risk

Duke University Medical Center neurobiologists have pinpointed circuitry in the brains of monkeys that assesses the level of risk in a given action. Their findings -- gained from experiments in which they gave the monkeys a chance to gamble to receive juice rewards -- could give insights into why humans compulsively engage in risky behaviors, including gambling, unsafe sex, drug use and overeating.

The researchers, Michael Platt and Allison McCoy, published their findings in the advanced online version of Nature Neuroscience, posted August 14, 2005. The research was sponsored by the National Institutes of Health, the EJLB Foundation, and the Klingenstein Foundation.

In their experiments, the researchers gave two male rhesus macaque monkeys chances to choose to look at either of two target lights on a screen. Looking at the "safe" target light yielded the same fruit juice reward each time. However, looking at the "risky" target light might yield a larger or smaller juice reward. The average juice reward delivered by looking at either target was the same.

To their surprise, the monkeys overwhelmingly preferred to gamble by looking at the risky target. This preference held, regardless of whether the scientists made the risky target reward more variable, or whether the monkeys had received more or less fruit juice during the course of the day.

"There was no rational reason why monkeys might prefer one of these options over the other because, according to the theory of expected value, they're identical," said Platt. The researchers also tested whether the monkeys were simply responding to the novelty of the risky target.

"We wondered whether the monkeys preferred the risky target because the experiment was dull and boring, and they wanted the variability," said Platt. "But when we made the task more interesting by changing the color of the lights on each trial, the monkeys didn't care anything about it."

In fact, when the r
'"/>

Source:Duke University Medical Center


Page: 1 2 3 4

Related biology news :

1. Rhesus monkeys can assess the visual perspective of others when competing for food
2. Logging changed ecological balance for monkeys, damaged health
3. Performing monkeys in Asia carry viruses that could jump species to humans
4. Genetic and environmental influences on alcohol consumption among rhesus monkeys
5. Executive monkeys influenced by other executives, not subordinates
6. Rhesus monkeys in Nepal may provide new alternative for HIV/AIDS research
7. Vaccine combined with short-term postexposure antibiotics protects monkeys from inhalational anthrax
8. Implanting dopamine generators in brain cells obtains improvement in Parkinsons in monkeys
9. New insight into people who see colors in letters and numbers
10. Alaskan puzzles, monitoring provide insight about North Pacific salmon runs
11. New insight into regulation of blood stem cells
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Gambling monkeys give insight into neural machinery risk

(Date:7/28/2014)... 2014) Rice University researchers are using magnetic beads ... that can be used as microscale models for polymer ... polymers, introduced as theory in the 1950s, can be ... should be of interest to materials scientists who study ... by Rice chemical and biomolecular engineer Sibani Lisa Biswal ...
(Date:7/28/2014)... July 28, 2014 Research and Markets ... Market in Latin America 2014-2018" report to their ... Biometrics measure and analyze biological data. These systems ... eye retinas, voice patterns, and hand measurements from the ... stored templates. The main purpose of a biometrics system ...
(Date:7/28/2014)... Institute for Biologically Inspired Engineering at Harvard University ... be commercialized by a newly formed private company ... personalized medicine products. The announcement follows ... Technology Development (OTD) and the start-up Emulate Inc., ... human Organs-on-Chips platform. , "This is a ...
Breaking Biology News(10 mins):Seeing is bead-lieving 2Biometrics Market in Latin America 2014-2018 2Wyss Institute's technology translation engine launches 'Organs-on-Chips' company 2Wyss Institute's technology translation engine launches 'Organs-on-Chips' company 3
... kidney or ureteral stones can now read EAU ... Laparoscopy and Urotechnology Section of the Hellenic Urologic ... the Spanish translation is the result of a ... and the Dominican Republic Society of Urology (SDU)., ...
... This release is available in French . ... back pain after a car accident, avoiding the harmful effects ... is particularly important for people with a smaller-than-average hippocampus, as ... are the findings of a study by Dr. Pierre Rainville, ...
... scientists have developed an algorithm that could help make DNA ... to researchers of all stripes. Andrew Smith, a computational ... Sciences, developed the algorithm along with USC graduate student Timothy ... to be published in Nature Methods on February ...
Cached Biology News:EAU Patient Information now available in Spanish and Greek 2Preventing chronic pain with stress management 2Taking the gamble out of DNA sequencing 2
(Date:7/28/2014)... Research and Markets has announced ... 2014-2018" report to their offering. ... biology covers the designing and engineering of completely new ... redesigning of natural biological systems that provide improved and ... of extreme genetic engineering because it not only alters ...
(Date:7/28/2014)... July 28, 2014   Propeller Health , the ... the hire of Brad Towle as Senior ... responsible for driving the company,s sales growth, customer acquisition ... healthcare, and specifically his past role in the development ... company at this pivotal time in the industry," said ...
(Date:7/28/2014)... COLLEGE STATION, Texas , July 28, 2014 /PRNewswire/ ... will be a 177-key, 4-star boutique hotel in the heart ... , Texas.  Photo - http://photos.prnewswire.com/prnh/20140725/130455 ... the first hotel within ATLAS , The ... mixture of standard rooms and suites, a sleek restaurant and bar, ...
(Date:7/25/2014)... Amgen (NASDAQ: AMGN ) announced ... per share dividend for the third quarter of 2014. ... to all stockholders of record as of the close ... About Amgen Amgen is committed to unlocking the potential ... discovering, developing, manufacturing and delivering innovative human therapeutics. This ...
Breaking Biology Technology:Global Synthetic Biology Market 2014-2018 2Propeller Health Hires Brad Towle as Senior Vice President of Business and Client Development 2Texas' Biocorridor Announces the Atlas Hotel, Centerpiece of Mixed Use Community for Biotech Industry 2Texas' Biocorridor Announces the Atlas Hotel, Centerpiece of Mixed Use Community for Biotech Industry 3Texas' Biocorridor Announces the Atlas Hotel, Centerpiece of Mixed Use Community for Biotech Industry 4Amgen Announces 2014 Third Quarter Dividend 2Amgen Announces 2014 Third Quarter Dividend 3
... 7 /PRNewswire-FirstCall/,-- Evotec AG (Frankfurt Stock Exchange: EVT) ... I safety and tolerability study with EVT,302. The ... EVT,302 and are an encouraging basis for further ... highly selective inhibitor of MAO-B in,development for smoking ...
... 7 Romark Laboratories, L.C., a,privately-owned biotechnology ... M.A.C.P., has joined the Company as Vice ... Dr. Keeffe served as Professor of Medicine, ... Transplant Program at Stanford,University Medical Center. He ...
... Management business, NATICK, Mass., Jan. 4 ... that it has completed the sale of,the controlling ... program to former principals and shareholders of Advanced,Bionics. ... sale,coincides with the closing of the amended merger ...
Cached Biology Technology:Phase I Safety and Tolerability Study With EVT 302 Successfully Completed 2Phase I Safety and Tolerability Study With EVT 302 Successfully Completed 3Phase I Safety and Tolerability Study With EVT 302 Successfully Completed 4Phase I Safety and Tolerability Study With EVT 302 Successfully Completed 5Romark Laboratories Names Emmet B. Keeffe, M.D. Vice President and Chief Medical Officer 2Boston Scientific Completes Sale of Auditory Business and Drug Pump Development Program 2Boston Scientific Completes Sale of Auditory Business and Drug Pump Development Program 3
... INK4a-ARF locus encodes two unrelated proteins both ... arrests the cell cycle in a p53-dependent ... the rapid degradation of mdm2 proteinrequired for ... accumulation. This interaction is mediated by ...
... CLS number is a new ... match Cornings product number. If ... order under the old Sigma-Aldrich ... service for assistance. Mfr ...
... Insulin exerts its effects ... insulin receptor, a disulfide-linked ... two Alpha subunits and ... in the following configuration: ...
... CLS number is a new ... match Cornings product number. If ... order under the old Sigma-Aldrich ... service for assistance. Mfr ...
Biology Products: