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:9/16/2014)... on September 13, 2014. The fire is human-caused and ... 2,300 acres in size and is mostly being fueled ... calm Monday night due to higher humidity. Yesterday ... beginning to construct a fireline on the West and North ... on the fire: , 7 20-person Crews, 4 Hot Shot ...
(Date:9/16/2014)... of rock hit the Yukatan peninsula near the site of ... teratons of TNT. It left a crater more than 150 ... volcanism are widely accepted to have wiped out the dinosaurs ... what happened to the plants on which the dinosaurs fed? ... of Arizona reveals that the meteorite impact that spelled doom ...
(Date:9/16/2014)... votes for independence later this week, its Government could ... that fracking is necessary, research has revealed. , The ... public perception of shale gas extraction in the UK ... north of the border are the least supportive of ... in the University,s School of Geography, said: "The clear ...
Breaking Biology News(10 mins):Meteorite that doomed the dinosaurs helped the forests bloom 2Meteorite that doomed the dinosaurs helped the forests bloom 3Scottish people most sceptical on fracking, survey shows 2Scottish people most sceptical on fracking, survey shows 3
... in their own interests and do not cooperate ... severity of infection. The selfish behaviour ... treat antibiotic-resistant infections, according to research being presented ... today. Bacteria work together by using a ...
... TORONTO, ON - Widespread reports of a decline in the ... and speculation that pollination is also likely on the decline. ... long-term evidence of a downward trend in pollination, while also ... numbers may have declined at our research site, but we ...
... San Diego have discovered that a gene critical for programmed ... stem cells, a finding that could help to improve the ... chemotherapy or radiation therapy that kills cancer cells by inducing ... side effects for human cancer patients is the depletion of ...
Cached Biology News:Backstabbing bacteria: A new treatment for infection? 2Biologists find way to reduce stem cell loss during cancer treatment 2
(Date:9/17/2014)... Md. (PRWEB) September 17, 2014 ... Comprehensive Two-Dimensional Liquid Chromatograph (2D-LC), which offers ... complex sample matrices. The system provides a ... sample analytes, which is beneficial to scientists ... extracts, and natural products. , Comprehensive 2D-LC ...
(Date:9/17/2014)... PA & Rockville, MD (PRWEB) September 17, 2014 ... won a Small Business Innovation Research (SBIR) grant to ... immunotherapy. The award will provide ITI with approximately $255,000 ... Tree nuts, a leading cause of food allergy, affect ... cause of anaphylaxis behind peanut allergy. Tree nut exposure ...
(Date:9/17/2014)... /PRNewswire/ - SQI Diagnostics Inc. (TSX-V: SQD) (OTCQX: SQIDF), ... technologies and products for advanced microarray diagnostics, today announced ... in the United States on ... on September 17, 2014 on the OTCQX under the ... the TSX Venture Exchange under its existing symbol SQD. ...
(Date:9/17/2014)... Escape Alert, LLC . filed international patents ... alert owners if their pet has escaped and enable them to ... in the pet’s body. This is the first implantable microchip ... been around for many years, they are passive until read by ... a pet’s location or alert the owner that the pet has ...
Breaking Biology Technology:Shimadzu’s New Nexera-e Two Dimensional Comprehensive Liquid Chromatograph Empowers Laboratories to Separate Even the Most Complex Mixtures 2Immunomic Therapeutics Awarded SBIR Grant to Develop Multi-Nut Allergy Immunotherapy 2Immunomic Therapeutics Awarded SBIR Grant to Develop Multi-Nut Allergy Immunotherapy 3SQI Diagnostics to begin Trading on the OTCQX Marketplace in the United States 2SQI Diagnostics to begin Trading on the OTCQX Marketplace in the United States 3Implantable Microchip for Pets with GPS Tracking - Patent Filed by Escape Alert, LLC. 2Implantable Microchip for Pets with GPS Tracking - Patent Filed by Escape Alert, LLC. 3
... DENVER, Nov. 8, 2011 Quest Diagnostics joined the ... participate in the American Cancer Society,s historic Cancer Prevention ... this national, longitudinal study is between November 8 and ... lifestyle, environmental and genetic factors that influence cancer risk ...
... VIENNA, November 8, 2011 Santo VC ... AFFiRiS AG   effective immediately and has also secured an ... same time, the German MIG fund increased its existing investment ... fund. As a result, AFFiRiS now has an additional EUR ...
... Biotech, Inc. (a suburban Philadelphia-based Company) announced today, at ... brand name of its flagship product to "RENADYL™." Formerly ... probiotic formulation helps maintain healthy kidney function. At a ... and health benefits of probiotics, Kibow has opted for ...
Cached Biology Technology:Quest Diagnostics Encourages Denver Area Residents to Enroll in Historic American Cancer Society Prevention Study November 8th - 19th 2Quest Diagnostics Encourages Denver Area Residents to Enroll in Historic American Cancer Society Prevention Study November 8th - 19th 3AFFiRiS AG: Capital Increase: AFFiRiS Brings Santo VC and MIG 11 on Board 2AFFiRiS AG: Capital Increase: AFFiRiS Brings Santo VC and MIG 11 on Board 3AFFiRiS AG: Capital Increase: AFFiRiS Brings Santo VC and MIG 11 on Board 4Kibow Changes Name of Flagship Kidney Function Support Product to 'RENADYL™' 2
... Cell Lines ,High Quality, Functionally-Validated, Ion Channel ... known for having a critical role in ... a key function in pain, CNS and ... have been investigated in therapeutic areas, such ...
... PrecisION Ion Channel Cell Lines ,High ... ,Ion channels are well known for having ... function and consequently have a key function ... that modulate ion channels have been investigated ...
... PrecisION Ion Channel Cell Lines ,High ... ,Ion channels are well known for having ... function and consequently have a key function ... that modulate ion channels have been investigated ...
Mouse polyclonal antibody raised against a partial recombinant CD320. NCBI Entrez Gene ID = 51293...
Biology Products: