Resting-State Brain Connectivity Changes in Obese Women After Roux-En-Y Gastric Bypass Surgery: A Longitudinal Study
Open accessAbstract
Bariatric surgery is an effective method to rapidly induce weight loss in severely obese people, however its impact on brain functional connectivity after longer periods of follow-up is yet to be assessed. We investigated changes in connectivity in 16 severely obese women one month before, one month after and one year after Roux-en-Y gastric bypass surgery (RYGB). 12 lean controls were also enrolled. Resting-state fMRI was acquired for all participants following an overnight fast and after a 260 kcal load. Connectivity between regions involved in food-related saliency attribution and reward-driven eating behavior was stronger in presurgery patients compared to controls, but progressively weakened after follow-up. At one year, changes in networks related to cognitive control over eating and bodily perception also occurred. Connectivity between regions involved in emotional control and social cognition had a temporary reduction early after treatment but had increased again after one year of follow-up. Furthermore, we could predict the BMI loss by presurgery connectivity in areas linked to emotional control and social interaction. RYGBP seems to reshape brain functional connectivity, early affecting cognitive control over eating, and these changes could be an important part of the therapeutic effect of bariatric surgery.
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After bariatric surgery, foods that are highly palatable and energy dense are most impacted by these neurobiological changes, which, in turn, decrease food intake.
“After having bariatric surgery, foods that are highly palatable and energy dense are most impacted by these neurobiological changes, which, in turn, decrease food intake (56–59).”
From Behavioral Interventions to Attenuate Driven Overeating and Weight Regain After Bariatric Surgery (2022) · cites this paper as [59]
The Discussion (page unavailable) reports reduced connectivity after surgery in reward-related regions and notes that those regions respond to high-energy food cues. The Conclusions (page unavailable) also describe changes in hunger perception and reward-seeking. But this resting-state study does not show that highly palatable, energy-dense foods are the most affected, or that the neural changes cause reduced food intake. (LLM, conf=0.84)
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- Authors
- Olivo, G., Zhou, W., Sundbom, M., Zhukovsky, C., Hogenkamp, P., Nikontovic, L., Stark, J., Wiemerslage, L., Larsson, E.-M., Benedict, C., & Schiöth, H. B.
- Affiliations
- Uppsala University (SE)
- Corresponding author
- Olivo, Gaia
- ORCID
- Venue
- Scientific Reports
- Published
- 2017-07-26
- Volume
- 7
- Issue
- 1
- Pages
- 6616-6616
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC5529553
- OpenAlex
- W2739159070
- Cited by
- 45
- References
- 56
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 5 · 2023: 5 · 2022: 7 · 2021: 11 · 2020: 3 · 2019: 6 · 2018: 3 · 2017: 1
- FWCI
- 3.64
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- KTH Publication Database DiVA (KTH Royal Institute of Technology) (submittedVersion, other-oa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Brain Research Foundation
- Vetenskapsrådet
- Novo Nordisk Fonden (NNF14OC0009349)
- Topics
- Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
- Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
- Social Sciences › Psychology › Clinical Psychology › Eating Disorders and Behaviors
- Keywords
- Roux-en-Y gastric bypass, bariatric surgery, obesity, resting-state functional connectivity, brain networks, food reward, emotional control, social cognition, body perception
- MeSH terms
- Adult, Brain, Feeding Behavior, Female, Humans, Longitudinal Studies, Magnetic Resonance Imaging, Middle Aged, Nerve Net, Obesity, Gastric Bypass, Young Adult, Connectome
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