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Central Nervous Processing of Visual Food Stimuli in Severely Obese Subjects

Obesity Clinical Trial

Official title:
Central Nervous Processing of Visual Food Stimuli in Severely Obese Subjects and After Roux-en Y Gastric Bypass Surgery - a fMRI Study

Clinical Trial Summary

Recent evidence has pointed to distinct alterations of brain functions in obese subjects some of which may even be causative for their obesity. The objective of this study was to examine food and non food related alterations in brain functions after excessive weight loss due to Roux-en Y gastric bypass surgery (RYGB), one of the most successful therapeutic approaches for long lasting weight loss. The investigators hypothesized that obese as compared with lean women show an altered activation pattern in the brain areas involved in the homeostatic regulation of eating behavior, i.e. the hypothalamus, in reward-related brain areas, such as the orbital frontal cortex (OFC) and the striatum as well as in prefrontal inhibitory control areas. Furthermore, the investigators hypothesized that women who had undergone a RYGB operation show a brain activity pattern that more closely mimics that of lean than severely obese women. In a supplementary test the investigators will assess gastrointestinal and metabolic response to a standardized meal in order to elucidate putative correlation of these responses with the results of fMRI scannings.

Clinical Trial Description

n/a

Study Design

Observational Model: Case Control, Time Perspective: Cross-Sectional

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT01493583
Study type Observational
Source Cantonal Hospital of St. Gallen
Contact
Status Completed
Phase N/A
Start date September 2009
Completion date December 2012
View Details
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