Motivational and neural correlates of self-control of eating: A combined neuroimaging and experience sampling study in dieting female college students.
Motivational and neural correlates of self-control of eating: A combined neuroimaging and experience sampling study in dieting female college students.
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DOI：
10.1016/j.appet.2016.03.027
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发表时间：
2016-08-01
期刊：
影响因子：
5.4
通讯作者：
Heatherton TF
中科院分区：
文献类型：
--
作者：
Lopez RB;Milyavskaya M;Hofmann W;Heatherton TF
自我调节是维持各种健康行为的关键能力，特别是在防止暴饮暴食和体重增加方面。之前的研究已经发现了饮食领域对自我控制的各种威胁，其中最主要的是欲望强度和负面情绪。在本研究中，我们研究了大学年龄的节食者在日常生活中遇到饮食诱惑时对这些威胁的经历的个体差异，并测试了这些差异是否是具有不同自我控制结果的节食者亚组的特征。具体来说，75 名节食女性（年龄范围：18-23 岁）参与了一项功能性磁共振成像 (fMRI) 和经验抽样相结合的研究。参与者在功能磁共振成像会议期间被动地观察食物线索，然后通过生态瞬时评估报告他们一周的日常饮食行为。我们检查了节食者的特征，这些节食者表现出上述因素的最有利组合（即低欲望强度和积极情绪），因此在调节饮食方面最成功。这些节食者认可更自主的自我调节目标，并且在食物提示反应任务期间更容易招募额下回，这是与抑制控制相关的大脑区域。我们认为这些动机和神经相关因素也可能与其他重要健康行为的自我调节有关。
Self-regulation is a critical ability for maintaining a wide range of health behaviors, especially in preventing overeating and weight gain. Previous work has identified various threats to self-control in the eating domain, chief among which are desire strength and negative affect. In the present study, we examined individual differences in college-aged dieters’ experiences of these threats as they encountered temptations to eat in their daily lives, and tested whether these differences characterized sub-groups of dieters with divergent self-control outcomes. Specifically, 75 dieting females (age range: 18-23) participated in a combined functional magnetic resonance imaging (fMRI) and experience sampling study. Participants passively viewed food cues during an fMRI session, and then reported their daily eating behaviors for one week via ecological momentary assessment. We examined the characteristics of dieters who exhibited the most favorable combination of the aforementioned factors (i.e., low desire strength and positive mood) and who were thus most successful at regulating their eating. These dieters endorsed more autonomous reasons for their self-regulatory goals, and during the food cue reactivity task more readily recruited the inferior frontal gyrus, a brain region associated with inhibitory control. We suggest that these motivational and neural correlates may also be implicated in self-regulation of other important health behaviors.