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  Brain response to food odors is not associated with body mass index and obesity-related metabolic health measures

Poessel, M., Morys, F., Breuer, N., Villringer, A., Hummel, T., & Horstmann, A. (2022). Brain response to food odors is not associated with body mass index and obesity-related metabolic health measures. Appetite, 168: 105774. doi:10.1016/j.appet.2021.105774.

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Poessel, Maria1, 2, Author           
Morys, Filip1, 3, Author           
Breuer, Nora1, 2, Author           
Villringer, Arno1, 4, 5, 6, 7, 8, Author           
Hummel, Thomas9, Author
Horstmann, Annette1, 2, 10, Author           
1Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
2Integrated Research and Treatment Center Adiposity Diseases, University of Leipzig, Germany, ou_persistent22              
3Montreal Neurological Institute and Hospital, McGill University, QC, Canada, ou_persistent22              
4Clinic for Cognitive Neurology, University of Leipzig, Germany, ou_persistent22              
5MindBrainBody Institute, Berlin School of Mind and Brain, Humboldt University Berlin, Germany, ou_persistent22              
6Charité University Medicine Berlin, Germany, ou_persistent22              
7International Max Planck Research School on the Life Course, Max Planck Institute for Human Development, Berlin, Germany, ou_persistent22              
8International Max Planck Research School on Neuroscience of Communication: Function, Structure, and Plasticity, MPI for Human Cognitive and Brain Sciences, Max Planck Society, Leipzig, DE, ou_2616696              
9Smell and Taste Clinic, University Hospital Carl Gustav Carus, Dresden, Germany, ou_persistent22              
10Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Finland, ou_persistent22              


Free keywords: Olfactory perception; Obesity; BMI; fMRI; Insulin resistance; Metabolic health
 Abstract: Smell perception plays a role in eating behavior and might be involved in the development of obesity. In fact, olfactory function is impaired in obesity and might depend on metabolic health factors. To date, the underlying neural mechanisms remain unclear. Here, we investigate neural processing of food-related odors in normal-weight, overweight and obese individuals. Fifty-three young and healthy participants (28.8 ± 4.4 years, 27 female; 24 normal-weight, 10 overweight and 19 obese) were presented with high- (chocolate, potato chips) and low-caloric (orange, cucumber) food odors during a functional magnetic resonance imaging (fMRI). We also assessed olfactory identification ability, body mass index (BMI), body fat percentage, insulin resistance and leptin. In brief, olfactory perception of food odors was linked to brain activity in the entorhinal and piriform cortex, and the insula, hippocampus, and amygdala. Insulin resistance was negatively related to olfactory identification. Additionally, perception of sweet versus savory odors was related to a higher brain activity in the right middle/superior frontal gyrus. Finally, we found no effect of obesity status, BMI, metabolic factors, or body fat percentage on neural responses to food odors. Overall, this suggests that food odor processing might depend on factors other than body weight status or associated markers of metabolic health.


Language(s): eng - English
 Dates: 2021-09-172021-03-252021-10-222021-10-292022-01-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.appet.2021.105774
Other: epub 2021
PMID: 34715246
 Degree: -



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Source 1

Title: Appetite
Source Genre: Journal
Publ. Info: London : Academic Press
Pages: - Volume / Issue: 168 Sequence Number: 105774 Start / End Page: - Identifier: ISSN: 0195-6663
CoNE: https://pure.mpg.de/cone/journals/resource/954922648093