Featured Research

from universities, journals, and other organizations

Junk Food Diet Causes Rats’ Brain Pleasure Centers To Become Progressively Less Responsive

Date:
October 27, 2009
Source:
Society for Neuroscience
Summary:
Brain pleasure centers became progressively less responsive in rats fed a diet of high-fat, high-calorie food, a new study has found. As the changes occurred, the rats developed compulsive overeating habits -- and became obese. The overeating continued even when it meant the rats had to endure an unpleasant consequence (a mild foot shock) in order to consume the food.

Brain pleasure centers became progressively less responsive in rats fed a diet of high-fat, high-calorie food, a new study has found. As the changes occurred, the rats developed compulsive overeating habits -- and became obese. The overeating continued even when it meant the rats had to endure an unpleasant consequence (a mild foot shock) in order to consume the food.

The findings were presented at Neuroscience 2009, the annual meeting of the Society for Neuroscience and the world's largest source of emerging news about brain science and health.

The researchers also found that as the activity of the brain's pleasure centers decreased, the rats became less likely to eat a well-balanced, nutritious diet -- even when the less palatable healthy food was the only food available to them.

"Not only did we find that the animals' brain reward circuits became less responsive as they continued to overeat and become obese," said senior author Paul J. Kenny, PhD, of the Scripps Research Institute in Jupiter, Fla., "but that decrease in responsiveness was similar to what our laboratory has seen previously in rats as they become addicted to cocaine or heroin. The data suggest that obesity and addiction may result from common neuroadaptations," he said.

The finding may have implications for humans, as the diets fed the rats (unlimited access to such high-caloric foods as bacon, sausage, cheesecake, and chocolate) were similar to those of millions of people who live in developed countries. Such diets are considered a major contributing factor to the current obesity epidemic in the United States.

Research was supported by Bank of America, the National Institute on Drug Abuse, and The Landenberger Foundation.


Story Source:

The above story is based on materials provided by Society for Neuroscience. Note: Materials may be edited for content and length.


Cite This Page:

Society for Neuroscience. "Junk Food Diet Causes Rats’ Brain Pleasure Centers To Become Progressively Less Responsive." ScienceDaily. ScienceDaily, 27 October 2009. <www.sciencedaily.com/releases/2009/10/091026231950.htm>.
Society for Neuroscience. (2009, October 27). Junk Food Diet Causes Rats’ Brain Pleasure Centers To Become Progressively Less Responsive. ScienceDaily. Retrieved August 21, 2014 from www.sciencedaily.com/releases/2009/10/091026231950.htm
Society for Neuroscience. "Junk Food Diet Causes Rats’ Brain Pleasure Centers To Become Progressively Less Responsive." ScienceDaily. www.sciencedaily.com/releases/2009/10/091026231950.htm (accessed August 21, 2014).

Share This




More Health & Medicine News

Thursday, August 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Possible Ebola Patient in Isolation at California Hospital

Possible Ebola Patient in Isolation at California Hospital

Reuters - US Online Video (Aug. 20, 2014) — A patient who may have been exposed to the Ebola virus is in isolation at the Kaiser Permanente South Sacramento Medical Center. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Raw: World's Oldest Man Lives in Japan

Raw: World's Oldest Man Lives in Japan

AP (Aug. 20, 2014) — A 111-year-old Japanese was certified as the world's oldest man by Guinness World Records on Wednesday. Sakari Momoi, a native of Fukushima in northern Japan, was given a certificate at a hospital in Tokyo. (Aug. 20) Video provided by AP
Powered by NewsLook.com
Do More Wedding Guests Make A Happier Marriage?

Do More Wedding Guests Make A Happier Marriage?

Newsy (Aug. 20, 2014) — A new study found couples who had at least 150 guests at their weddings were more likely to report being happy in their marriages. Video provided by Newsy
Powered by NewsLook.com
Ebola-Hit Sierra Leone's Freetown a City on Edge

Ebola-Hit Sierra Leone's Freetown a City on Edge

AFP (Aug. 19, 2014) — Residents of Sierra Leone's capital voice their fears as the Ebola virus sweeps through west Africa. Duration: 00:56 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins