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Updated: May 22, 2026
04:48
Control of Eating Behavior Using a Novel Feedback System
Published on: May 8, 2018
Functional network connectivity underlying food processing: disturbed salience and visual processing in overweight
Stephanie Kullmann1, Anna-Antonia Pape, Martin Heni
1MEG Center, University of Tübingen, Otfried Müller Strasse 47, 72076 Tübingen, Germany. stephanie.kullmann@med.uni-tuebingen.de
Cerebral Cortex (New York, N.Y. : 1991)
|May 16, 2012
Summary
This study reveals distinct brain network activity patterns in response to food cues between lean and obese individuals. Obese subjects exhibit generalized heightened responses in the salience network, potentially driving overeating.
Area of Science:
- Neurobiology
- Cognitive Neuroscience
- Obesity Research
Background:
- Understanding the neurobiological underpinnings of human eating behavior and its modulation by body weight is crucial.
- Investigating interactions between brain networks provides insight into the complex regulation of appetite and food intake.
Purpose of the Study:
- To examine how stimulus category (food vs. nonfood), caloric content, and body weight influence the activity and functional connectivity of key brain networks.
- To identify differences in brain network responses to food stimuli between healthy lean and overweight/obese adults.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed to analyze brain activity.
- Independent component analysis (ICA) was used to identify and assess 5 distinct brain networks: motor sensory, default-mode, extrastriate visual, temporal visual association, and salience networks.
- Participants included healthy lean and overweight/obese adults.
Main Results:
- Food stimuli significantly modulated the extrastriate visual and salience networks, with distinct patterns observed between lean and overweight/obese groups.
- Lean subjects showed stimulus category modulation in the temporal visual association network and caloric content modulation in the salience network.
- Overweight/obese subjects displayed a generalized augmented response in the salience network and altered functional connectivity in networks related to object recognition, motivational salience, and executive control.
Conclusions:
- Body weight significantly alters brain network responses to food stimuli, particularly affecting visual and salience networks.
- Differences in functional connectivity and network modulation in overweight/obese individuals may contribute to overconsumption and eating behavior dysregulation.
- These findings highlight potential neurobiological targets for interventions aimed at managing obesity and disordered eating.
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