News | Neuro Imaging | January 28, 2016

Vanderbilt Study Shows Brain Function Differs in Obese Children

Results suggest change in brain function may be necessary to prevent overweight children from becoming obese

obese and overweight children, brain function, MRI, Vanderbilt University Medical Center

January 28, 2016 — The brains of children who are obese function differently from those of children of healthy weight, and exhibit an “imbalance” between food-seeking and food-avoiding behaviors, researchers at Vanderbilt University Medical Center have found.

Diet and exercise may not be enough to restore normal weight or prevent overweight children from becoming obese, they conclude. It may be necessary to change their brain function.

In a paper published in the journal Heliyon, the researchers suggest that mindfulness, a practice used as a therapeutic technique to focus awareness, should be studied as a way to encourage healthy eating and weight loss in children.

“Adults, and especially children, are primed towards eating more,” said senior author Kevin Niswender, M.D., Ph.D. “This is great from an evolutionary perspective … but in today’s world, full of readily available, highly advertised, energy-dense foods, it is putting children at risk of obesity.”

“We think mindfulness could recalibrate the imbalance in the brain connections associated with childhood obesity,” added co-senior author Ronald Cowan, M.D., Ph.D. “Mindfulness has produced mixed results in adults … So far there have been few studies showing its effectiveness for weight loss in children.”

Childhood obesity in the United States has nearly doubled during the past 30 years, and among adolescents it has tripled. In 2010, a third of U.S. children were considered obese or overweight.

The Vanderbilt study included 38 children, five who were considered obese and six who were overweight. Their eating behaviors were assessed using a questionnaire, and their brain function was assessed using magnetic resonance imaging (MRI).

Three brain regions in adults are potent modulators of eating habits: the nucleus accumbens, associated with reward-motivated behaviors; the frontal pole, associated with impulsivity; and the inferior parietal lobe (IPL), associated with response inhibition, the ability to inhibit or override a response such as overeating.

The researchers used MRI to determine the balance of functional neural connectivity between these eating-related brain regions in children of various weights.

“We wanted to look at the way (their) brains function in more detail so we can better understand what is happening neurologically in children who are overweight and obese,” said first author and Vanderbilt graduate student BettyAnn Chodkowski.

They found that as weight increased among children, the connectivity between the inhibition-associated IPL and reward-associated nucleus accumbens decreased, while connectivity between the nucleus accumbens and the impulsivity-associated frontal pole increased.

This suggests that unhealthy eating behaviors and obesity could reflect an imbalance in the functional connectivity of brain areas associated with response inhibition, impulsivity and reward.

The practice of mindfulness can increase response inhibition and decrease impulsivity. Mindfulness has been used to encourage healthy responses to everyday adversities, although few studies have tested its use in the area of healthy eating or weight loss among children.

Among adults, mindfulness has had mixed results when used for weight loss and weight control, which may reflect “the extreme tenaciousness of adult obesity,” as well as age-related loss of brain plasticity, the researchers noted.

This supports the importance of early identification of children at risk for obesity, and the need to develop novel methods to treat and prevent it, they concluded.

Niswender is associate professor of medicine and molecular physiology & biophysics in the Vanderbilt Brain Institute, and Cowan is professor of psychiatry, psychology and of radiology & radiological sciences.

The study was supported by the American Heart Association and Vanderbilt Diabetes Research and Training Center grant DK020593 from the National Institutes of Health.

For more information: www.mc.vanderbilt.edu

Related Content

Doctor-Patient Discussions Neglect Potential Harms of Lung Cancer Screening
News | Lung Cancer | August 15, 2018
August 15, 2018 — Although national guidelines advise doctors to discuss the benefits and harms of...
Videos | Magnetic Resonance Imaging (MRI) | August 13, 2018
Haojie Wang, M.D., director of advanced cardiovascular MRI and a member of the heart valve clinic at Baylor Scott Whi
ACR LI-RADS Steering Committee Releases New Version of CT/MRI LI-RADS
News | Clinical Decision Support | August 13, 2018
August 13, 2018 — The American College of Radiology Liver Imaging Reporting and Data System (LI-RADS) steering commit
Indiana Hospital Installs First Vantage Titan/Zen Edition 1.5T MRI in U.S.
News | Magnetic Resonance Imaging (MRI) | August 10, 2018
Patients in Pulaski County, Ind., now have access to quiet, comfortable magnetic resonance (MR) exams thanks to the...
3T MRI Installed at The London Clinic Through Hospital Roof

Image courtesy of The London Clinic

News | Magnetic Resonance Imaging (MRI) | August 08, 2018
Patients at The London Clinic, a private hospital and charity, will be the first in the United Kingdom to access the...
Aidoc Receives FDA Clearance for AI Detection of Acute Intracranial Hemorrhage
Technology | Clinical Decision Support | August 08, 2018
Aidoc announced that it was granted U.S. Food and Drug Administration (FDA) clearance for the first product of its...
Cardiac Imaging Reveals Roots of Preeclampsia Damage in Pregnant Women
News | Women's Health | August 07, 2018
Johns Hopkins researchers say a heart imaging study of scores of pregnant women with the most severe and dangerous form...
Cardiac Monitoring a Higher Priority for High-Risk Breast Cancer Patients
News | Cardio-oncology | August 07, 2018
August 7, 2018 — While heart failure is an uncommon complication of...
Videos | Contrast Media | August 03, 2018
Lawrence Tanenbaum, M.D., FACR, vice president and director of advanced imaging at RadNet, discusses the latest resea
Videos | Magnetic Resonance Imaging (MRI) | August 01, 2018
Robert Junk and Tobias Gilk, MRSO, MRSE, of architectural firm RAD-Planning, discuss the different types of safety ha
Overlay Init