Navigation Links
Altered neural circuitry may lead to anorexia and bulimia
Date:6/3/2013

Anorexia nervosa and bulimia nervosa disorders characterized by extreme eating behavior and distorted body image are among the deadliest of psychiatric disorders, with few proven effective treatments.

A landmark study, with first author Tyson Oberndorfer, MD, and led by Walter H. Kaye, MD, professor of psychiatry at the University of California, San Diego School of Medicine, suggests that the altered function of neural circuitry contributes to restricted eating in anorexia and overeating in bulimia. The research, published June 4 in the early on-line edition of the American Journal of Psychiatry, may offer a pathway to new and more effective treatments for these serious eating disorders.

"It has been unknown whether individuals with anorexia or bulimia have a disturbance in the system that regulates appetite in the brain, or whether eating behavior is driven by other phenomena, such as an obsessional preoccupation with body image," said Kaye, director of the UCSD Eating Disorders Treatment and Research Program. "However, this study confirms earlier studies by our group and others that establish a clear link between these disorders and neural processes in the insula, an area of the brain where taste is sensed and integrated with reward to help determine whether an individual hungry or full."

The UC San Diego study used functional MRI to test this neurocircuitry by measuring the brain response to sweet tastes in 28 women who had recovered from either anorexia or bulimia.

Relative to a cohort of 14 women who had never suffered from either disorder, those recovered from anorexia had significantly diminished, and those recovered from bulimia, significantly elevated responses to the taste of sucrose in the right anterior insula.

"One possibility is that restricted eating and weight loss occurs in anorexia because the brain fails to accurately recognize hunger signals," said Oberndorfer. "Alternately, overeating in bulimia could represent an exaggerated perception of hunger signals."

A recent complementary study that investigated brain structure in anorexia and bulimia nervosa (Frank et al 2013) similarly highlights that the insula could be an integral part of eating disorder pathology.

The researchers added that such studies could have very important implications for treatment, and that identifying abnormal neural substrates could help to reformulate the basic pathology of eating disorders and offer new targets for treatment.

"It may be possible to modulate the experience by, for example, enhancing insula activity in individuals with anorexia or dampening the exaggerated or unstable response to food in those with bulimia," said Kaye. Studies indicate that healthy subjects can use real-time fMRI, biofeedback or mindfulness training to alter the brain's response to food stimuli. For patients with anorexia who have an overly active satiety signal in response to palatable foods, the researchers suggest bland or even slightly aversive foods might prevent the brain's overstimulation. Medications may also be found that enhance the reward response to food, or decrease inhibition to food consumption in the brain's reward circuitry.


'/>"/>

Contact: Debra Kain
ddkain@ucsd.edu
619-543-6163
University of California - San Diego
Source:Eurekalert

Related medicine news :

1. Mosquitoes With Altered Gene Cant Sniff People Out
2. Circadian clock gene rhythms in brain altered in depression, UC Irvine Health study finds
3. Scientists revolutionize the creation of genetically altered mice to model human disease
4. Scientists identify gene that is consistently altered in obese individuals
5. New research finds slower growth of preterm infants linked to altered brain development
6. Reduced Oxygen Levels Could Double Neural Stem Cells’ Chance of Survival
7. Neural synchrony may be key to understanding how the human brain perceives
8. A neural basis for benefits of meditation
9. Implicit race bias increases the differences in the neural representations of black and white faces
10. Neural interface for prosthesis can restore function in motor control brain areas
11. Classifying neural circuit dysfunctions using neuroeconomics
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... Montreal, Canada (PRWEB) , ... June 25, 2016 , ... ... the pursuit of success. In terms of the latter, setting the bar too high ... low, risk more than just slow progress toward their goal. , Research from ...
(Date:6/24/2016)... ... 2016 , ... June 19, 2016 is World Sickle Cell Observance Day. In ... benefits of holistic treatments, Serenity Recovery Center of Marne, Michigan, has issued ... Sickle Cell Disease (SCD) is a disorder of the red blood cells, which can ...
(Date:6/24/2016)... MIAMI, Fla. (PRWEB) , ... June 24, 2016 , ... ... Florida Trend magazine’s 2016 Legal Elite. The attorneys chosen by their peers for this ... of Florida. , Seven Greenberg Traurig Shareholders received special honors as members of this ...
(Date:6/24/2016)... ... ... Inc, makers of Topricin and MyPainAway Pain Relief Products, join The ‘Business for a Fair ... hour by 2020 and then adjusting it yearly to increase at the same rate as ... the wage floor does not erode again, and make future increases more predictable. , The ...
(Date:6/24/2016)... NY (PRWEB) , ... June 24, 2016 , ... ... Haute Living, is proud to recognize Dr. Barry M. Weintraub as a prominent ... “the most beautiful women in the world, and the most handsome men, look ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... --  Pulmatrix, Inc ., (NASDAQ: PULM ), ... today that it was added to the Russell Microcap ... set of U.S. and global equity indexes on June ... for Pulmatrix," said Chief Executive Officer Robert Clarke ... in developing drugs for crucial unmet medical needs, and ...
(Date:6/23/2016)... June 23, 2016  MedSource announced today that ... e-clinical software solution of choice.  This latest decision ... value to their clients by offering a state-of-the-art ... relationship establishes nowEDC as the EDC platform of ... full-service clients.  "nowEDC has long been a preferred ...
(Date:6/23/2016)... , June 23, 2016 Research ... "Pharmaceutical Excipients Market by Type (Organic Chemical (Sugar, Petrochemical, ... (Oral, Topical, Coating, Parenteral) - Global Forecast to 2021" ... The global pharmaceutical excipients market is ... a CAGR of 6.1% in the forecast period 2016 ...
Breaking Medicine Technology: