Brain responses of obese individuals are more weakly linked to feelings of hunger

Jul 13, 2010

Research to be presented at the 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, finds that that feelings of hunger have less influence on how the brain responds to the smell and taste of food in overweight than healthy weight individuals.

The research team scanned the brains of healthy and overweight participants and found that the overweight participants had greater activity in many key that respond to the smell and taste of food. An important new finding was that the brain responses of healthy weight participants were associated with their feelings of hunger, whereas the responses of overweight participants did not depend on whether the participants felt hungry or full. Dana Small from The John B Pierce Laboratory and Yale University says, "We are all guilty of mindlessly reaching for a handful of peanuts or chips. The is a region of the important for orchestrating this behavior. Our findings show that feelings of fullness are effective in reducing amygdala responses in healthy but not overweight people".

In an environment that is rich in sights and smells of food, one factor that may contribute to overeating is whether eating serves to dampen the brain's responses to food cues that usually encourage eating. The team also reports that activation of the amygdala predicted by participants one year after the scanning session. "For some people feelings of fullness may provide a good brake on eating behavior. For others, the brake may be less effective, resulting in more eating in the absence of , with subsequent weight gain", says Small.

Explore further: 2015 medicare fee schedule offers payment for chronic care

Provided by Society for the Study of Ingestive Behavior

not rated yet
add to favorites email to friend print save as pdf

Related Stories

Overweight people may not know when they've had enough

Jan 09, 2008

Researchers at the U.S. Department of Energy's Brookhaven National Laboratory have found new clues to why some people overeat and gain weight while others don't. Examining how the human brain responds to "satiety" messages ...

Hormone regulates fondness for food

Aug 09, 2007

Scientists have discovered that leptin, one of the key hormones responsible for reducing hunger and increasing the feeling of fullness, also controls our fondness for food.

Just expecting a tasty food activates brain reward systems

Jul 27, 2009

Research to be presented at the 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, shows that exposing rats to a context ...

High-fat, high-sugar foods alter brain receptors

Jul 28, 2009

Overconsumption of fatty, sugary foods leads to changes in brain receptors, according to new animal research at Johns Hopkins University School of Medicine. The new research results are being presented at the 2009 annual ...

Recommended for you

Irish court mulls rights of dead woman vs. fetus

18 hours ago

A lawyer representing a 17-week-old fetus living inside the clinically dead body of its mother told a Dublin court Wednesday that the unborn child's right to life trumps the woman's right to a dignified death.

Trends in indoor tanning among high school students

Dec 23, 2014

While indoor tanning has decreased among high school students, about 20 percent of females engaged in indoor tanning at least once during 2013 and about 10 percent of girls frequently engaged in the practice by using an indoor ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.