Associations Between Intertemporal Food Choice and BMI in Adult Women: An fMRI Study Using a Quasi-realistic Design.

IF 1.3 4区 医学 Q4 BEHAVIORAL SCIENCES
Anne Sommerfeld, Manfred Herrmann, Marcus Heldmann, Peter Erhard, Thomas F Münte
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引用次数: 0

Abstract

Background: Impulsivity resulting in unrestrained eating has been implicated as a contributing factor for obesity. Delay discounting (DD) tasks where individuals choose between a smaller immediate reward and a larger delayed reward provide useful data to describe impulsive decision-making and to determine the extent to which delayed rewards are discounted.

Objective: To study the association between body mass index(BMI) and delay discounting for food and money in adult women.

Methods: We used a DD task with real food rewards to investigate impulsive decision-making as related to BMI in participants who self-identified as women. Participants in group A had a mean BMI of 21.4 (n = 14), and participants in group B had a mean BMI of 32.2 (n = 14). Each group was tested in a hungry state during a single session. We performed fMRI during a DD task requiring participants to choose between a food item (one sandwich) constituting a smaller immediate reward and multiple food items (two, three, or four sandwiches) constituting a series of larger delayed rewards available at different intervals. The steepness of the discounting curve for food was determined from these decisions. Participants then completed a monetary discounting task to facilitate a comparison of the discounting of food and monetary rewards.

Results: Participants in group B discounted food rewards more steeply than monetary rewards. Decisions for delayed rewards led to increased activations of brain areas related to executive control on fMRI, such as the head of the caudate nucleus and the anterior cingulate cortex (ACC) in group A, but not group B participants.

Conclusion: Our findings suggest that group B had difficulty deciding against the immediate food rewards due to insufficient recruitment of cortical control areas. Therefore, impulsivity is an important target for behavioral interventions in individuals with obesity.

成年女性时空食物选择与体重指数之间的关系:采用准现实设计的 fMRI 研究。
背景:冲动导致无节制进食被认为是肥胖的一个诱因。延迟折现(DD)任务让个体在较小的即时奖励和较大的延迟奖励之间做出选择,它为描述冲动性决策和确定延迟奖励的折现程度提供了有用的数据:研究成年女性的体重指数(BMI)与食物和金钱延迟折扣之间的关系:方法:我们使用一个有真实食物奖励的延迟贴现任务来研究自我认同为女性的参与者的冲动决策与体重指数之间的关系。A 组参与者的平均体重指数为 21.4(n = 14),B 组参与者的平均体重指数为 32.2(n = 14)。每组都在饥饿状态下进行了一次测试。我们在一项 DD 任务中进行了 fMRI 分析,该任务要求参与者在构成较小即时奖励的一种食物(一个三明治)和构成一系列较大延迟奖励的多种食物(两个、三个或四个三明治)之间做出选择。根据这些决定来确定食物折现曲线的陡峭程度。然后,参与者完成一项货币折扣任务,以便对食物和货币奖励的折扣进行比较:结果:B 组参与者对食物奖励的折现曲线比对金钱奖励的折现曲线更陡。对延迟奖励的决定导致 fMRI 上与执行控制有关的脑区激活增加,如 A 组参与者的尾状核头部和前扣带回皮层(ACC),而 B 组参与者则没有:我们的研究结果表明,由于大脑皮层控制区域的招募不足,B 组参与者难以决定是否立即接受食物奖励。因此,冲动是肥胖症患者行为干预的一个重要目标。
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来源期刊
CiteScore
2.40
自引率
7.10%
发文量
68
审稿时长
>12 weeks
期刊介绍: Cognitive and Behavioral Neurology (CBN) is a forum for advances in the neurologic understanding and possible treatment of human disorders that affect thinking, learning, memory, communication, and behavior. As an incubator for innovations in these fields, CBN helps transform theory into practice. The journal serves clinical research, patient care, education, and professional advancement. The journal welcomes contributions from neurology, cognitive neuroscience, neuropsychology, neuropsychiatry, and other relevant fields. The editors particularly encourage review articles (including reviews of clinical practice), experimental and observational case reports, instructional articles for interested students and professionals in other fields, and innovative articles that do not fit neatly into any category. Also welcome are therapeutic trials and other experimental and observational studies, brief reports, first-person accounts of neurologic experiences, position papers, hypotheses, opinion papers, commentaries, historical perspectives, and book reviews.
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