Lian Junwei, Guo Jiaqi, Dai Xu, Deng Xia, Liu Yong, Zhao Jia, Lei Xu
Faculty of Psychology, Southwest University, Chongqing, China.
Key Laboratory of Cognition and Personality (Ministry of Education), Southwest University, Chongqing, China.
Cereb Cortex. 2025 Mar 6;35(3). doi: 10.1093/cercor/bhaf056.
Previous studies have found inhibitory control differences between obese individuals and those of normal weight. However, some normal-weight individuals with high negative physical self-perception on the fatness subscale show restrictive eating behaviors and attentional bias toward high-calorie food, potentially influencing these differences. We collected behavioral and electroencephalography data using a novel inhibitory control task. Results showed that individuals with high negative physical self-perception on the fatness subscale exhibited significantly greater restraint eating behavior compared to controls. Both theta and beta power differed between groups, with higher theta power in the high negative physical self-perception on the fatness subscale group than in the obese group and more negative beta power in the high negative physical self-perception on the fatness subscale group compared to both other groups. Theta power was greater in no-go than go conditions, while beta power was more negative in response to high-calorie versus low-calorie food stimuli. Importantly, theta power successfully decoded go/no-go conditions across all groups using multivariate pattern analysis, while beta power distinguished these conditions only in the negative physical self-perception on the fatness subscale and control groups. These findings suggest that theta and beta power, along with multivariate pattern analysis, can reliably distinguish inhibitory control ability among the three groups, highlighting the importance of considering negative physical self-perception on the fatness subscale when assessing inhibitory control differences between normal-weight and obese individuals.
先前的研究发现肥胖个体与正常体重个体之间存在抑制控制差异。然而，一些在肥胖分量表上对自身身体有高度负面认知的正常体重个体表现出限制饮食行为以及对高热量食物的注意偏向，这可能影响了这些差异。我们使用一项新颖的抑制控制任务收集了行为和脑电图数据。结果显示，在肥胖分量表上对自身身体有高度负面认知的个体与对照组相比，表现出显著更强的克制饮食行为。两组之间的θ波和β波功率均存在差异，在肥胖分量表上对自身身体有高度负面认知的组中，θ波功率高于肥胖组，且与其他两组相比，该组的β波功率更负。在“否”试条件下的θ波功率大于“是”试条件，而在面对高热量食物刺激与低热量食物刺激时，β波功率更负。重要的是，使用多变量模式分析，θ波功率成功解码了所有组的“是”试/“否”试条件，而β波功率仅在肥胖分量表上有负面身体自我认知的组和对照组中区分了这些条件。这些发现表明，θ波和β波功率以及多变量模式分析能够可靠地区分三组之间的抑制控制能力，凸显了在评估正常体重个体和肥胖个体之间的抑制控制差异时考虑肥胖分量表上负面身体自我认知的重要性。
