Navigation Links
'Connection error' in the brains of anorexics
Date:1/24/2013

RUB researchers find altered connectivity in the brain network for body perception. The weaker the connection, the greater the misjudgement of body shape

When people see pictures of bodies, a whole range of brain regions are active. This network is altered in women with anorexia nervosa. In a functional magnetic resonance imaging study, two regions that are important for the processing of body images were functionally more weakly connected in anorexic women than in healthy women. The stronger this "connection error" was, the more overweight the respondents considered themselves. "These alterations in the brain could explain why women with anorexia perceive themselves as fatter, even though they are objectively underweight" says Prof. Dr. Boris Suchan of the Institute of Cognitive Neuroscience at the Ruhr-Universitt. Together with Prof. Dr. Dietrich Grnemeyer (University of Witten-Herdecke), Prof. Dr. Silja Vocks (University of Osnabrck) and other colleagues, the Bochum researchers report in the journal Behavioural Brain Research.

Anorexics misperceive their body shape

The researchers tested ten anorexic and fifteen healthy women of similar age. To start with, all the women judged on the computer which of several different silhouettes corresponded best to their own body shape. Ten control subjects who did not participate in the MRI scan answered the same question by matching a photo of the test subject to the right silhouette. Both healthy and anorexic women estimated their body shape differently than outsiders: healthy subjects rated themselves as thinner than the control subjects. Anorexic women on the other hand perceived themselves to be fatter than the control subjects did.

Brain areas for body perception examined with MRI

In MRI scanners, the researchers then recorded the brain activity of the 25 participants while they observed photos of bodies. Above all, they analysed the activity in the "fusiform body area" (FBA) and the "extrastriate body area" (EBA), because previous studies showed that these brain regions are critical for the perception of bodies. To this end, the neuroscientists from Bochum calculated the so-called effective connectivity between the FBA and EBA in both hemispheres. This is a measure of how much the activity in several brain areas is temporally correlated. A high degree of correlation is indicative of a strong connection.

Brains of anorexics structurally and functionally altered

The connection between the FBA and EBA was weaker in women with anorexia nervosa than in healthy women. In addition, the researchers found a negative correlation between the EBA-FBA connection in the left hemisphere and the misjudgement of body weight: the weaker the effective connectivity between the EBA and FBA was, the fatter the subjects with anorexia falsely estimated themselves to be. "In a previous study we found that there are structural changes in the brains of patients with anorexia", says Boris Suchan. They have a lower density of nerve cells in the EBA. "The new data shows that the network for body processing is also functionally altered." The EBA, which has a lower cell density in anorexics, is also the area that stood out in the connection analysis: it receives reduced input from the FBA. "These changes could provide a mechanism for the development of anorexia", says Suchan.


'/>"/>
Contact: Prof. Dr. Boris Suchan
boris.suchan@rub.de
49-234-322-7575
Ruhr-University Bochum
Source:Eurekalert

Related medicine news :

1. Healthy Brain Connections Help Maintain Intellect in Old Age
2. 2 new studies show connection between sleepiness and pro-athlete careers
3. Continuing Education Provider HomeCEUConnection.com Announces New Speech-Language Pathology Live Webinar
4. Feces fossils lend new insights into connection between Native-Americans, diabetes
5. New method to find novel connections from gene to gene, drug to drug and between scientists
6. Brains Connections May Predict Intelligence: Study
7. Researchers explore connection between popular pain relievers, bladder cancer
8. Emotional disconnection disorder threatens marriages, researcher says
9. Continuing education provider HomeCEUConnection.com Announces Upcoming Attendance at Annual American Physical Therapy Association Combined Sections Meeting in San Diego.
10. Scientists ID New Genetic Connection for Gout
11. HomeCEUConnection.com Announces Launch of New Website
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/7/2016)... (PRWEB) , ... December 07, 2016 , ... Sharon Kleyne, ... Global Climate Change and Your Health on Voice of America, declared on her radio ... call attention to the fact that when these bullies attack leaders in corporate America, ...
(Date:12/7/2016)... ... 07, 2016 , ... Delete® - Tattoo Removal and Laser Salon Offers Delightful ... Save Up To 33% Off Botox® and Juvederm® Products Now Through December 31, 2016 ... Delightful Deals on Botox® and Juvederm® just in time for the holiday ...
(Date:12/7/2016)... , ... December 07, 2016 , ... The medical profession ... and winter seasons. One major study analyzing heart attacks among 138,602 people recorded ... of a given year. We would all agree of course–no time of year is ...
(Date:12/7/2016)... ... December 07, 2016 , ... ... WellnessPro Plus for consumers and healthcare professionals to manage chronic and acute ... the treatment modalities available in a single device. The announcement is part ...
(Date:12/7/2016)... ... ... “Tomorrow Trump Goes To Washington”: a brief but engaging illustration depicting the ... “Tomorrow Trump Goes To Washington” is the creation of published author, Nancy Engestrom, a ... Nancy attributes her patriotic nature to her WWII veteran father. She says, “I ...
Breaking Medicine News(10 mins):
(Date:12/6/2016)... , Dec. 6, 2016 Radioisotopes are radioactive ... are produced either by using nuclear research reactor or ... form of alpha, beta or gamma when changed to ... used in Nuclear medicine, specifically in medical diagnostics. In ... information about a human body,s functioning. Radiotherapy is also ...
(Date:12/6/2016)... Human Vaccines Market: Scope and Methodology ... country wise analysis of the human vaccines market. ... vaccines products, raw material suppliers, vaccine processing companies, ... The report provides qualitative and quantitative analysis ... comprises market dynamics, trends, product overview, and country-level ...
(Date:12/6/2016)... 2016 Two new disaster drones delivered telemedical ... mass casualty event Tuesday at John Bell Airport in ... before an audience including Mississippi ... Security, Federal Law Enforcement Agencies, and the United Nations. ... (Health Integrated Rescue Operations), was developed by Italo ...
Breaking Medicine Technology: