Ghrelin increases willingness to pay for food
Research to be presented at the upcoming annual meeting of the Society for the Study of Ingestive Behavior (SSIB), the foremost society for research into all aspects of eating and drinking behavior, suggests that ghrelin, a naturally occurring gut hormone, increases our willingness to pay for food, while simultaneously decreasing our willingness to pay for non-food items.
Have you ever wondered about why you are willing to pay more for food when you are hungry? Ghrelin, a naturally occurring gut hormone that signals hunger by acting on the brain, is instrumental in this process. One way that ghrelin acts is by increasing activity in brain "reward" regions when people view pictures of food. In this new study, the authors were interested in whether ghrelin affects people's willingness to pay for food and non-food items. Brain activity was examined using functional MRI in normal weight volunteers while they placed bids for food or for non-food trinkets after being injected with ghrelin, or after being injected only with saline.
Ghrelin treatment significantly increased the willingness of study subjects to pay for food items, but reduced their willingness to pay for non-food trinkets. As expected, activity within several brain reward regions was correlated with bid values on both food and non-food items when subjects were treated with saline. However, when subjects were treated with ghrelin, such correlated activity was limited to a unique brain reward region, the nucleus accumbens.
These results support the view that ghrelin increases hunger and eating, in part, by increasing reward signaling specifically in the nucleus accumbens. A better grasp of brain reward signaling mechanisms may lead to better ways to control appetite and fight obesity.
Provided by Society for the Study of Ingestive Behavior
- Gut hormone makes food look even yummier May 06, 2008 | not rated yet | 0
- Feeding hormone ghrelin modulates ability of rewarding food to evoke dopamine release Jul 12, 2011 | not rated yet | 0
- Stomach hormone ghrelin increases desire for high-calorie foods Jun 21, 2010 | not rated yet | 0
- Hunger hormone: Makes food more attractive May 06, 2008 | not rated yet | 0
- Genetic changes behind sweet tooth Apr 04, 2011 | not rated yet | 0
- Motion perception revisited: High Phi effect challenges established motion perception assumptions Apr 23, 2013 | 3 / 5 (2) | 2
- Anything you can do I can do better: Neuromolecular foundations of the superiority illusion (Update) Apr 02, 2013 | 4.5 / 5 (11) | 5
- The visual system as economist: Neural resource allocation in visual adaptation Mar 30, 2013 | 5 / 5 (2) | 9
- Separate lives: Neuronal and organismal lifespans decoupled Mar 27, 2013 | 4.9 / 5 (8) | 0
- Sizing things up: The evolutionary neurobiology of scale invariance Feb 28, 2013 | 4.8 / 5 (10) | 14
Classical and Quantum Mechanics via Lie algebras
Apr 15, 2011 I'd like to open a discussion thread for version 2 of the draft of my book ''Classical and Quantum Mechanics via Lie algebras'', available online at http://lanl.arxiv.org/abs/0810.1019 , and for the...
- More from Physics Forums - Independent Research
More news stories
Vermont became on Monday the third US state to legalize physician-assisted suicide.
Other 12 hours ago | not rated yet | 0
Food microbiology laboratories continue to submit false negative results and false positive results on a routine basis. A retrospective study of nearly 40,000 proficiency test results over the past 14 years, presented today ...
Other 17 hours ago | not rated yet | 0
Siemens has presented the world's first ultrasound system with wireless transducers. The system's transducers, which can be easily operated with one hand, transmit ultrasound images via radio waves to the ...
Other 22 hours ago | not rated yet | 0
(AP)—A woman who lost both hands, her left leg and right foot after contracting a flesh-eating disease has been fitted with prosthetic hands.
Other May 18, 2013 | not rated yet | 0
(Medical Xpress)—A three-year multinational study has tracked and detailed the progression of Huntington's disease (HD), predicting clinical decline in people carrying the HD gene more than 10 years before ...
13 minutes ago | not rated yet | 0
No new human cases of the H7N9 virus have been recorded in China for a week, national health authorities said, for the first time since the outbreak began in March.
46 minutes ago | not rated yet | 0
A Nobel prize-winning scientist Tuesday played down "shock-horror scenarios" that a new virus strain will emerge with the potential to kill millions of people.
1 hour ago | 5 / 5 (1) | 0
Johns Hopkins researchers say they have discovered specific chemical alterations in two genes that, when present during pregnancy, reliably predict whether a woman will develop postpartum depression.
2 hours ago | not rated yet | 0 |
(Medical Xpress)—A research team, led by Jeremy Barr, a biology post-doctoral fellow, unveils a new immune system that protects humans and animals from infection.
11 hours ago | 4.6 / 5 (13) | 5 |
Researchers have pinpointed a catalytic trigger for the onset of Alzheimer's disease – when the fundamental structure of a protein molecule changes to cause a chain reaction that leads to the death of neurons ...
15 hours ago | 5 / 5 (3) | 0 |