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Related Experiment Video

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Neural Stimulation of Prefrontal Cortex Improves Food-Related Memory Suppression.

Jingjing Li1, Yuan Gao1, Jiangming Chen1

  • 1Faculty of Psychology, Southwest University, Chongqing, China.

Obesity (Silver Spring, Md.)
|October 27, 2025
PubMed
Summary

Neuromodulating the right dorsolateral prefrontal cortex (dlPFC) with anodal stimulation improved inhibitory control over food memories in individuals with overweight/obesity. This approach shows promise for obesity interventions by enhancing resistance to food temptations.

Keywords:
dorsolateral prefrontal cortexfood rewardhigh‐definition transcranial direct current stimulation (HD‐tDCS)memory suppressionoverweight/obesity

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Obesity Research

Background:

  • Obesity is linked to difficulties resisting palatable food, potentially due to impaired inhibitory control over eating behaviors.
  • Enhancing inhibitory control over food-related memories is a proposed strategy for obesity management.
  • The right dorsolateral prefrontal cortex (dlPFC) is crucial for regulating reward-driven impulses, but its modulation for food memory control in obesity is understudied.

Purpose of the Study:

  • To investigate the effects of combining food Think/No-Think (TNT) training with high-definition transcranial direct current stimulation (HD-tDCS) targeting the right dlPFC.
  • To assess the impact on inhibitory control over food-related memories in individuals with overweight/obesity.

Main Methods:

  • Utilized a food Think/No-Think (TNT) paradigm.
  • Employed HD-tDCS targeting the right dlPFC.
  • Assessed inhibitory control over food-related memory in healthy weight and overweight/obesity groups.

Main Results:

  • Anodal stimulation significantly improved memory suppression in both healthy weight and overweight/obesity groups.
  • Individuals with overweight/obesity showed greater early reductions in memory intrusion, indicating a potentially stronger benefit from anodal stimulation.
  • Findings suggest enhanced ability to resist memory intrusions related to food.

Conclusions:

  • Combining neuromodulation (HD-tDCS) with cognitive training (TNT) is a promising intervention strategy for obesity.
  • This approach offers theoretical insights and empirical support for future obesity prevention and treatment.
  • The study provides evidence for the efficacy of targeting the right dlPFC to improve inhibitory control in the context of obesity.