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<p>Body image dissatisfaction and eating disorders are major public health concerns influenced by sociocultural, psychological, and neurobiological factors. This study explored the neural mechanisms underlying cognitive conflict triggered by high-calorie food and obese body image stimuli in young women, using a modified two-choice oddball task and event-related potentials (ERPs). Forty-two female undergraduates completed the task while EEG data were recorded. The stimuli included standard (water cup), high-calorie food, and obese body images. ERP components (N2, P3, LPP), self-esteem scores, and BMI were analyzed. Participants showed longer reaction times and lower accuracy for high-calorie food and obese body images compared to standard stimuli. Additionally, self-esteem and BMI predicted behavioral responses: self-esteem negatively correlated with reaction times to high-calorie foods, and BMI negatively correlated with accuracy for obese body images. ERP results revealed larger N2 amplitudes for high-calorie food, indicating heightened conflict monitoring, smaller P3 amplitudes for high-calorie food, suggesting reduced cognitive resource allocation, and larger LPP amplitudes for obese body images, indicating stronger emotional processing. This study provides new insights into the neural correlates of food-related conflict control and lays the foundation for developing targeted interventions to address body image concerns and promote healthy eating.</p>

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Neural mechanisms of cognitive conflict in food and body image processing: an ERP study

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • Xinrui Zhang,
  • Hanxiao Liu,
  • Yueyue Wang,
  • Na Meng,
  • Rui Zhang,
  • Meng Zhang

摘要

Body image dissatisfaction and eating disorders are major public health concerns influenced by sociocultural, psychological, and neurobiological factors. This study explored the neural mechanisms underlying cognitive conflict triggered by high-calorie food and obese body image stimuli in young women, using a modified two-choice oddball task and event-related potentials (ERPs). Forty-two female undergraduates completed the task while EEG data were recorded. The stimuli included standard (water cup), high-calorie food, and obese body images. ERP components (N2, P3, LPP), self-esteem scores, and BMI were analyzed. Participants showed longer reaction times and lower accuracy for high-calorie food and obese body images compared to standard stimuli. Additionally, self-esteem and BMI predicted behavioral responses: self-esteem negatively correlated with reaction times to high-calorie foods, and BMI negatively correlated with accuracy for obese body images. ERP results revealed larger N2 amplitudes for high-calorie food, indicating heightened conflict monitoring, smaller P3 amplitudes for high-calorie food, suggesting reduced cognitive resource allocation, and larger LPP amplitudes for obese body images, indicating stronger emotional processing. This study provides new insights into the neural correlates of food-related conflict control and lays the foundation for developing targeted interventions to address body image concerns and promote healthy eating.