Research

Hormonal

In morbidly obese individuals, elevated tonic glucose metabolism in the dorsal caudate nucleus mediates abnormal anticipatory reward processing, characterized by heightened connectivity with the amygdala and insula and a failure to activate dorsolateral prefrontal inhibitory control when viewing appetizing food cues.

If you struggle with obesity, your brain may be biologically wired to react more strongly to food cues than others. This isn't a moral failing; it's a neurobiological reality where the 'reward' center (caudate) is overactive and the 'control' center (prefrontal cortex) is underactive. Recognizing this helps shift the strategy from 'trying harder' to 'managing cues' (e.g., removing visual food triggers) to bypass the hyperactive reward pathway.

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These findings suggest that enhanced sensitivity to external food cues in obesity may involve abnormal stimulus-response learning and incentive motivation subserved by the dorsal caudate nucleus, which in turn may be due to abnormally high input from the amygdala and insula and dysfunctional inhibitory control by the frontal cortical regions.
Lauri Nummenmaa et al. · PLoS ONE · 2012

Why this rating

High-quality multimodal imaging (PET/fMRI) with rigorous controls (hyperinsulinemic clamp), though the sample size is small (n=19 obese, n=16 controls).

Source

Dorsal Striatum and Its Limbic Connectivity Mediate Abnormal Anticipatory Reward Processing in Obesity

Lauri Nummenmaa et al. · PLoS ONE · 2012

DOI 10.1371/journal.pone.0031089

cross_sectional · n=35Cited 229×
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DOI resolved against Crossref · corpus check 2026-06-10

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