Individual Differences in Reward and Somatosensory-Motor Brain Regions Correlate with Adiposity in Adolescents
Open accessAbstract
The prevalence of adolescent obesity has increased dramatically over the past three decades, and research has documented that the number of television shows viewed during childhood is associated with greater risk for obesity. In particular, considerable evidence suggests that exposure to food marketing promotes eating habits that contribute to obesity. The present study examines neural responses to dynamic food commercials in overweight and healthy-weight adolescents using functional magnetic resonance imaging (fMRI). Compared with non-food commercials, food commercials more strongly engaged regions involved in attention and saliency detection (occipital lobe, precuneus, superior temporal gyri, and right insula) and in processing rewards [left and right nucleus accumbens (NAcc) and left orbitofrontal cortex (OFC)]. Activity in the left OFC and right insula further correlated with subjects' percent body fat at the time of the scan. Interestingly, this reward-related activity to food commercials was accompanied by the additional recruitment of mouth-specific somatosensory-motor cortices-a finding that suggests the intriguing possibility that higher-adiposity adolescents mentally simulate eating behaviors and offers a potential neural mechanism for the formation and reinforcement of unhealthy eating habits that may hamper an individual's ability lose weight later in life.
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The finding that men with high BMI differ from women in processing and modulation of rewarding food stimuli may be attributed to oestrogen's ability to modulate dopaminergic and serotonergic signalling.
“The findings reported here, which suggest that men with high BMI differ from their female counterparts in the processing and modulation of rewarding food stimuli, may be attributed to the ability of oestrogen to modulate dopaminergic and serotonergic signalling 40, 111.”
From History of early life adversity is associated with increased food addiction and sex-specific alterations in reward network connectivity in obesity (2019) · cites this paper as [111]
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- Authors
- Rapuano, K. M., Huckins, J. F., Sargent, J. D., Heatherton, T. F., & Kelley, W. M.
- Affiliations
- Dartmouth College (US)
- Dartmouth–Hitchcock Medical Center (US)
- Corresponding author
- Rapuano, Kristina M.
- Venue
- Cerebral Cortex
- Publisher
- Oxford University Press (OUP)
- Published
- 2015-05-20
- Volume
- 26
- Issue
- 6
- Pages
- 2602-2611
- ISSN
- 1047-3211 (ISSN-L)
- 1460-2199
- PMC
- PMC4869807
- OpenAlex
- W2101068918
- Cited by
- 90
- References
- 64
- Citations by year
- 2026: 3 · 2025: 8 · 2024: 8 · 2023: 8 · 2022: 6 · 2021: 6 · 2020: 7 · 2019: 11 · 2018: 16 · 2017: 9 · 2016: 8
- FWCI
- 13.64
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- other-oa
- Locations
- Cerebral Cortex (publishedVersion, other-oa)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- HighWire Press Open Archive (submittedVersion)
- Funders
- UMass/Dartmouth/Vermont Cancer Centers Collaborative Research Program Grant Initiative
- National Institute on Drug Abuse (R01DA022582)
- National Science Foundation Graduate Research Fellowship (DGE-1313911)
- William H. Neukom 1964 Institute for Computational Science at Dartmouth College
- Topics
- Social Sciences › Psychology › Clinical Psychology › Eating Disorders and Behaviors
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
- Keywords
- adolescent obesity, food advertising, food marketing exposure, reward processing, nucleus accumbens, orbitofrontal cortex, insula, fat mass, dietary habits
- MeSH terms
- Adolescent, Advertising, Brain, Brain Mapping, Child, Female, Food, Humans, Individuality, Magnetic Resonance Imaging, Male, Motion Perception, Neuropsychological Tests, Obesity, Photic Stimulation, Reward, Television, Cohort Studies
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