Differentiating the abnormalities of food and monetary reward cue processing associated with overweight/obesity: an Activation Likelihood Estimation (ALE) meta-analysis
Authors' conclusion
Obesity represents a critical global health challenge, yet the neurocognitive distinctions in processing different rewards among individuals with OW/OB remain poorly characterized. Our findings reveal both dissociable and overlapping neural alterations during the processing of primary (food) versus secondary (monetary) rewards in OW/OB, implicating altered reward sensitivity, decision-making, and inhibitory control. The results underscore the necessity for reward-type-specific interventions targeting these neural mechanisms to address obesity-related dysregulation. Contrasts in brain activation during food and monetary reward processing between individuals with overweight/obesity (OW/OB) and normal weight (NW).
Study context
- Population
- Individuals with OW/OB vs NW controls in fMRI studies of food or monetary reward cue processing; Web of Science, PubMed, PsycInfo to May 2025
- Participants
- 1,065 individuals26 studies
- Comparison
- OW/OB vs NW controls during food and monetary reward cue processing
- Outcome
- Brain activation during food and monetary reward cues, OW/OB vs NW
Methodological detailsActivation Likelihood Estimation (ALE), functional MRI
- Activation Likelihood Estimation (ALE)
- Functional MRI
Pooled result
As reported in the abstract
- Both reward types: overlapping reduced activation in left posterior cingulate cortex (PCC) and insula
- Left middle frontal gyrus: decreased activation to food cues, increased to monetary cues
- Food reward: increased activation in bilateral caudate nucleus, hippocampus, anterior cingulate cortex (ACC) and medial prefrontal cortex; decreased amygdala responses
- Monetary reward: increased activation in right lateral nucleus and hypothalamus; decreased in right subthalamic nucleus and posterior ventral lateral nucleus
- 6 monetary reward and 20 food reward studies
Original publication
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