#1 Obese Less Able to Control Food Impulses, Study Says09-20-2011, 08:02 PMThin people may be able to summon more mental defenses to resist tempting, high-calorie foods than obese people, researchers said on Monday.
Brain scans of thin people who looked at pictures of high-calorie foods showed increased activity in a region of the brain used for impulse control, but obese people showed little activity in this region, the researchers found.
"I think there essentially may be biological reasons why people can't necessarily control their desire for food," said Robert Sherwin of Yale University School of Medicine in Connecticut, who worked on the study published in the Journal of Clinical Investigation.
The study is part of a push to understand the underlying biological processes that contribute to obesity, which affects more than one third of adults and nearly 17 percent of children in the United States.
Researchers at Yale and the University of Southern California used functional magnetic resonance imaging, or fMRI, to examine areas of the brain that become active when a person views images of high-calorie foods, healthy foods like fruits and vegetables and non-food items.
The study involved 14 healthy people, nine thin and five obese volunteers, who underwent brain scans two hours after eating. The researchers manipulated blood sugar levels, testing the subjects when they had normal and low blood sugar levels.
They found that when blood sugar levels were low, brain regions called the insula and striatum associated with rewards are activated, signaling a desire to eat.
The prefrontal cortex, which normally dampens signals to eat, was less able to put the brakes on signals generated from the striatum to eat.
That was especially true in the obese study subjects who were shown pictures of high-calorie foods.
But when blood sugar levels were normal, the thin study subjects showed greater activity in the prefrontal cortex, and this reduced activity in brain regions involved in rewards.
"There is a controller, a higher function that controls your reward centers. That controller is deficient in people with obesity. They don't activate that system," Sherwin said in a telephone interview.
He said larger studies are needed to confirm the findings, but the study does suggest that obese people may be less able to shut off parts of the brain that drive food cravings.
Read more: http://www.foxnews.com/health/2011/0...#ixzz1YXZ9aUxPThe difference between pigs and people is that when they tell you you're cured it isn't a good thing.
09-21-2011, 09:34 AM
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- Sep 2011
I flat don't believe any of it. It has all the stench of government propaganda. The purpose of such propaganda is to create an impression that the obese are somehow mentally ill, but those normal people aren't.
To begin with, what's obese? The standards for obesity were changed about 15 years ago putting 30% MORE people into the obese category when they were of normal weight.
I have no idea where they get brain scan nonsense. It is so utterly wrong to assume that a thin person is going to just WANT that high calorie food and struggle to resist the impulse. In most cases there isn't an impulse to resist! Many thin people ARE thin because that high calorie food doesn't interest them enough to create an impluse to eat!
Even more nonsense is that an impulse to eat high calorie foods can be created in thin people by pictures. Ask a bakery. Even the real thing on display doesn't create an impulse. People do not respond to food by visualization. Responses to food cues are by SMELL. Racks of fresh baked bread will be ignored. Put out some fake bread baking smell and people will be dragged in off the street.
This is government nonsense for some purpose of its own.
09-21-2011, 10:23 AM
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- Mar 2010
Obesity appears to be caused by some screwed up settings in the body which create the propensity to gain weight combined with an abnormal appetite, and it appears to be genetic. Yet, science and medicine has been reluctant to treat obesity like a medical condition in need of study, instead they treat it through artificial malnutrition and/or mechanical alterations to the digestive system which make the patient lose weight by making the patient ill.
So IMO medicine has traditionally treated obesity as a mental disorder which they attempt to remedy by creating physical disorder in the form of diet, pills, or bariatric surgery.
The sad thing is that while they have largely been looking for new ways to make money off fat people while not actually curing them, the nuts and bolts of the biology which would need to be addressed in the fix would probably be like AIDS research, ie of directed benefit to a relative few people but a body of work which gets to the core of all sorts of diseases and problems affecting a broad range of people.
Imagine some of the possibilities if scientists could get to the core of metabolism.
09-21-2011, 10:28 AM
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- Sep 2011
No matter how you slice it, this "study" is majorly flawed. Starting with the change in standards years ago.
The goal of course has nothing to do with treating the truly morbidly obese, it's to manufacture a "normal" to give the government an inroad in control of food. The first benchmark of dictatorships and communist control.
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- Mar 2010
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