Inhibiting food reward: delay discounting, food reward sensitivity, and palatable food intake in overweight and obese women.
Inhibiting food reward: delay discounting, food reward sensitivity, and palatable food intake in overweight and obese women.
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DOI：
10.1038/oby.2011.57
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发表时间：
2011-11
期刊：
影响因子：
6.9
通讯作者：
Liebman, Rebecca
中科院分区：
文献类型：
--
作者：
Appelhans, Bradley M.;Woolf, Kathleen;Pagoto, Sherry L.;Schneider, Kristin L.;Whited, Matthew C.;Liebman, Rebecca
暴饮暴食被认为是消费美味食物的欲望动机超过了个体抑制进食的能力。这一假设在最近的研究中得到了支持，研究对象主要是体重正常的女性，但尚未在肥胖人群中得到验证。目前的研究测试了食物奖励敏感性和抑制控制在预测能量充足的超重和肥胖女性美味食物摄入方面的相互作用（N=62）。用食物力量量表（Power of food Scale）测量对美味食物奖励的敏感性。抑制控制是通过计算机化的选择任务来评估的，该任务捕捉到相对于较小的即时奖励，人们倾向于低估较大的延迟奖励。参与者完成了一项在没有饥饿的情况下进食的方案，在这个方案中，体内平衡的能量需求通过平淡无奇的燕麦片来消除，然后是一个伪造的实验室口味测试，包括美味和平淡的零食。在控制体重指数和预负荷摄入量的回归分析中，食物奖励敏感性和抑制控制之间的相互作用是美味食物摄入的重要预测因子。探索这种相互作用表明，在低抑制控制水平下，更高的食物奖励敏感性预示着更大的美味食物摄入，但与高抑制控制水平下的摄入无关。不出所料，在预测平淡食物摄入量的类似回归分析中没有发现关联。研究结果支持了一种饮食行为的神经行为模型，即只有在抑制控制不足的情况下，对美味食物奖励的敏感性才会导致暴饮暴食。加强抑制控制可以改善体重管理方案。
Overeating is believed to result when the appetitive motivation to consume palatable food exceeds an individual’s capacity for inhibitory control of eating. This hypothesis was supported in recent studies involving predominantly normal weight women, but has not been tested in obese populations. The current study tested the interaction between food reward sensitivity and inhibitory control in predicting palatable food intake among energy-replete overweight and obese women (N=62). Sensitivity to palatable food reward was measured with the Power of Food Scale. Inhibitory control was assessed with a computerized choice task that captures the tendency to discount large delayed rewards relative to smaller immediate rewards. Participants completed an eating in the absence of hunger protocol in which homeostatic energy needs were eliminated with a bland preload of plain oatmeal, followed by a bogus laboratory taste test of palatable and bland snacks. The interaction between food reward sensitivity and inhibitory control was a significant predictor of palatable food intake in regression analyses controlling for body mass index and the amount of preload consumed. Probing this interaction indicated that higher food reward sensitivity predicted greater palatable food intake at low levels of inhibitory control, but was not associated with intake at high levels of inhibitory control. As expected, no associations were found in a similar regression analysis predicting intake of bland foods. Findings support a neurobehavioral model of eating behavior in which sensitivity to palatable food reward drives overeating only when accompanied by insufficient inhibitory control. Strengthening inhibitory control could enhance weight management programs.
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