Key Laboratory of Cognition and Personality (Ministry of Education), Southwest University, Chongqing, China; School of Psychology, Southwest University, Chongqing, China.
Key Laboratory of Cognition and Personality (Ministry of Education), Southwest University, Chongqing, China; School of Psychology, Southwest University, Chongqing, China.
Behav Brain Res. 2020 Jan 13;377:112249. doi: 10.1016/j.bbr.2019.112249. Epub 2019 Sep 18.
Negative mood states are hypothesized to increase the risk for overeating among restrained eaters. However, neurophysiological features of inhibitory control during negative mood states among restrained eaters are poorly understood. To address this gap, we aimed to assess event related potentials (ERPs) associated with food-specific inhibitory control among successful restrained eaters (SREs, n = 17), unsuccessful restrained eaters (UREs, n = 18), and non-restrained eaters (NREs, n = 18) engaged in a food-related go/no-go task during negative versus neutral mood states. Compared to neutral mood states, negative mood states were related to comparatively greater no-go N2a amplitudes in the entire sample. Regarding group differences, no-go N2a amplitudes of SREs were greater than those of UREs across negative and neutral mood states. However, no-go P3 amplitudes of SREs decreased significantly during the negative mood state while no change was observed for other groups. Results suggest that negative mood states may interfere with conflict monitoring and behavioral inhibition in general, but inhibitory control over food may be enhanced among SREs during negative mood states relative to UREs. Results may provide psychophysiological bases for understanding why SREs succeed and UREs fail in controlling appetitive responses to external food cues.
消极情绪状态被假设会增加节食者暴食的风险。然而，节食者在消极情绪状态下的抑制控制的神经生理特征仍知之甚少。为了弥补这一空白，我们旨在评估成功节食者（SREs，n=17）、不成功节食者（UREs，n=18）和非节食者（NREs，n=18）在消极情绪状态与中性情绪状态下进行与食物相关的 Go/No-Go 任务时，与食物特定抑制控制相关的事件相关电位（ERPs）。与中性情绪状态相比，消极情绪状态与整个样本中较大的 No-Go N2a 振幅相关。关于组间差异，在消极和中性情绪状态下，SREs 的 No-Go N2a 振幅均大于 UREs 的。然而，SREs 的 No-Go P3 振幅在消极情绪状态下显著降低，而其他组则没有变化。结果表明，消极情绪状态可能会干扰一般的冲突监测和行为抑制，但与 UREs 相比，SREs 在消极情绪状态下对食物的抑制控制可能会增强。结果可能为理解为什么 SREs 能够成功控制对外界食物线索的食欲反应，而 UREs 却不能提供心理生理学依据。
