A balance of activity in brain control and reward systems predicts self-regulatory outcomes.
A balance of activity in brain control and reward systems predicts self-regulatory outcomes.
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DOI：
10.1093/scan/nsx004
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发表时间：
2017-05-01
影响因子：
4.2
通讯作者：
Heatherton TF
中科院分区：
文献类型：
--
作者：
Lopez RB;Chen PA;Huckins JF;Hofmann W;Kelley WM;Heatherton TF
先前的神经影像学研究表明，在暴露于食物线索后，与奖励相关的活动增加，预示着自我控制失败。平衡模型表明，自我调节失败是由于奖励和执行控制机制的不平衡。然而，一个悬而未决的问题是，当人们在日常生活中遇到诱惑线索时，与执行控制（与奖励）相关的大脑系统活动的相对平衡是否支持自我调节结果。69名长期节食者，一个经常失去自我控制的人群，在功能磁共振成像扫描期间完成了食物线索反应任务，然后通过生态瞬时评估对日常饮食行为进行为期一周的采样。我们将参与者大脑系统中与执行控制和奖励相关的食物线索活动与现实世界的饮食模式联系起来。具体来说，一个平衡分数代表了与自我调节控制相关的大脑区域的活动量，相对于自动奖励相关的活动，预测了节食者在接下来的一周内对饮食行为的控制。这种平衡措施可能反映了个人的自我控制能力，并在其他领域和人群中检查自我调节的成功是有用的。
Previous neuroimaging work has shown that increased reward-related activity following exposure to food cues is predictive of self-control failure. The balance model suggests that self-regulation failures result from an imbalance in reward and executive control mechanisms. However, an open question is whether the relative balance of activity in brain systems associated with executive control (vs reward) supports self-regulatory outcomes when people encounter tempting cues in daily life. Sixty-nine chronic dieters, a population known for frequent lapses in self-control, completed a food cue-reactivity task during an fMRI scanning session, followed by a weeklong sampling of daily eating behaviors via ecological momentary assessment. We related participants’ food cue activity in brain systems associated with executive control and reward to real-world eating patterns. Specifically, a balance score representing the amount of activity in brain regions associated with self-regulatory control, relative to automatic reward-related activity, predicted dieters’ control over their eating behavior during the following week. This balance measure may reflect individual self-control capacity and be useful for examining self-regulation success in other domains and populations.