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:2/8/2016)... ... February 08, 2016 , ... ... states in the U.S. require dental technicians to be certified or obtain continuing ... industry, NADL created the “What’s In Your Mouth?” campaign to inform dentists and ...
(Date:2/7/2016)... ... February 07, 2016 , ... Women's Excellence staff, in all four locations, wore ... Wear Red Day is the first Friday each February and a day to bring ... in 3 deaths among women each year – more than all cancers combined. Go ...
(Date:2/7/2016)... ... 2016 , ... Dr. Todd Hobgood , certificated in ... surgical expertise. Technically known as deoxycholic acid or previously as ATX-101, Kybella® ... for reduction of fat below the chin (aka the “double chin”). Medication side ...
(Date:2/6/2016)... ... ... US Sports Camps is proud to sponsor the Bay Area Disc Association's ... leaders, ultimate organizations, and coaches from around the US. The theme for this year’s ... of Youth and Education, describes this year YUCC as “an important conversation we must ...
(Date:2/6/2016)... , ... February 06, 2016 , ... Shark Finds ... announce the launch of a new DRTV campaign with Belly Bands. , Having a ... everything from sprays to puppy pads and find nothing works, get Belly Bands, ...
Breaking Medicine News(10 mins):
(Date:2/8/2016)... Feb. 8, 2016   GS1 US will ... guide them through GS1 Standards implementation to address the ... Unique Device Identification (UDI) rule. Scott ... Beth Gibson , senior director industry development, medical devices, ... director, GS1 US --> Scott ...
(Date:2/8/2016)... Feb. 8, 2016 Nueterra, the ... specialized in the development of equity partnerships ... it has divided its interests between two ... Capital will continue the founding company,s private ... operate a national system of integrated provider ...
(Date:2/8/2016)... Pa. , Feb. 8, 2016   ... November Research Group (NRG),s pharmacovigilance technology services ... system-related consulting services and an Oracle Argus Specialized ... services to Life Sciences companies. ... and expands HighPoint,s life sciences capabilities and provides ...
Breaking Medicine Technology: