Clinical Research Directory

Effects of Brain Stimulation on Food Intake and Behavioral Weight Loss Treatment

This study will determine whether electrical stimulation of an area of the brain called the dorsolateral prefrontal cortex, which is important in determining the feeling of fullness after eating, affects how much food a person eats and weight loss over 4 weeks. It will also compare weight changes in people who attend weight loss counseling sessions and those who do not over this period of time. Obese, non-diabetic people between 18 and 60 years of age who are in good health and who live in the Phoenix, AZ, metropolitan area are eligible for this study. Candidates must have a body mass index of 35 kg/m(2) or more and weigh less than 350 pounds. Participants are admitted to the NIH inpatient unit in Phoenix for the first 9 days of the study for tests, which include meal tests to determine eating behaviors and caloric intake, blood and urine tests, glucose tolerance test, weight measurement, psychological assessments and DEXA scan to measure body fat. For 3 of the days, they will be asked to eat all of their food from automated vending machines. Some subjects receive transcranial direct current stimulation (TDCS). For this procedure, electrodes that conduct electricity are placed on the head and arm and the current is turned on for 40 minutes. Some tingling may be felt under the electrodes. Other subjects receive sham TDCS, with the current turned on only very briefly. After the evaluations, subjects are discharged home from the NIH unit and instructed to eat 25 percent fewer calories than they consumed while on a weight maintenance diet the first 3 days of their inpatient stay. They maintain the lower calorie diet at home for 4 weeks. During this period they come to the NIH unit 3 days a week to receive either real or sham TDCS.

Building Research for Intervention Development in Gliosis and Eating Habits

The goal of this study is to 1) use magnetic resonance imaging (MRI) to evaluate the effect of nutritious foods on inflammation in the human hypothalamus of children and 2) assess the feasibility and acceptability of nutritious food feeding intervention strategies in children with overweight or obesity.

Intergenerational Mealtime at a Shared Site: A Small-scale Trial

The goal of this study is to find out whether having children and older people who attend an intergenerational center eating lunch together on a regular basis may be an improvement over continuing to eat lunch with their generational peers in separate dining rooms at the center. Specifically, the study analyzes the functioning and potential impact of an intergenerational dining room in terms of healthy eating, nutrition, self-evaluation of health and well-being, relational care, nutritional knowledge, and intergenerational attitudes. For this purpose, it sets up, in an intergenerational center, a dining room attended by children aged 2-3 years and older people aged 75 years and older who had previously been taking their lunch in separate dining rooms at the center. The main questions this study aims to answer are: * Does eating lunch at the intergenerational dining room improve the intake of healthy foods by children and older people compared to eating at their usual separate dining rooms with their peers? * Does this type of intergenerational dining room serve as a space for nutritional education of children and older people? * Does the experience of eating together have a positive influence in terms of children's attitudes towards older people and vice versa?