An mPOA-ARCAgRP pathway modulates cold-evoked eating behavior

Enhanced appetite occurs as a means of behavioral thermoregulation at low temperature. Neural circuitry mediating this crosstalk between behavioral thermoregulation and energy homeostasis remains to be elucidated. We find that the hypothalamic orexigenic agouti-related neuropeptide (AgRP) neurons in the arcuate nucleus (ARC) are profoundly activated by cold exposure. The calcium signals in ARCAgRP neurons display an immediate-response pattern in response to cold stimulation. Cold-responsive neurons in the medial preoptic area (mPOA) make excitatory synapses onto ARCAgRP neurons. Inhibition of either ARCAgRP neurons or ARC-projecting mPOA neurons attenuates cold-evoked feeding, while activation of the mPOA-to-ARC projection increases food intake. These findings reveal an mPOA-ARCAgRP neural pathway that modulates cold-evoked feeding behavior.

Disordered Eating Behaviors Through the Lens of Self-Determination Theory

This study aimed to verify a conceptual model of eating regulation based on the Self-Determination Theory. This model suggests that basic psychological needs satisfaction is related to general self-determined motivation and autonomous regulation toward eating, which in turn are associated with less disordered eating behaviors and attitudes and better satisfaction with life. Two hundred thirty-nine women without an eating disorder completed self-reported questionnaires. The hypothesized model was tested with a serial multiple mediation analysis using PROCESS macro. The overall indirect effect of basic psychological needs satisfaction on life satisfaction through the three mediators, i.e. general motivation, regulation of eating behaviors, and eating behaviors and attitudes, was significant. Results are coherent with the Self-Determination Theory and add to past research by suggesting that basic psychological needs satisfaction might be a key target when addressing women’s disordered eating behaviors and attitudes.

The interactive role of eating regulation and stress in the prediction of weight-related outcomes among college students

The interactive role of eating regulation and perceived stress on weight-related outcomes was examined among 319 sophomore year college students (110 males and 209 females). Moderated regressions were used to examine interactions between stress and eating regulation on study outcomes including body mass index (BMI) and body fat. Eating regulation moderated associations between stress and BMI and body fat outcomes. Students reporting high perceived stress, high autonomous eating regulation, low controlled regulation, and low amotivation exhibited higher outcomes (BMI and body fat) than those with similar eating regulation but lower perceived stress. Students with lower autonomous eating regulation and higher controlled regulation had no differences in study outcomes across levels of stress. College students who regulate their eating behaviours for health reasons (specifically showing autonomous regulation) exhibit higher BMI and body fat when they report higher levels of perceived stress. Health promotion programs for college students need to target education efforts towards stress reduction and healthy eating behaviours.

Motivational dynamics underlying eating regulation in young and adult female dieters: relationships with healthy eating behaviours and disordered eating symptoms

OBJECTIVE

To investigate whether type of goals and motives underlying females' eating regulation are associated differentially with daily eating behaviours, dependent upon weight and age category.

DESIGN

99 late adolescent female dieters (Mage = 18.94) and 98 adult female dieters (Mage = 45.06), 23.6% of which were overweight, completed a questionnaire and a 7-day diary assessment. Descriptive analysis and path analysis were performed to investigate the research questions.

MAIN OUTCOME MEASURES

Healthy eating behaviours (HEHS), drive for thinness and binge eating symptoms (EDI).

RESULTS

Appearance-focused and controlled eating regulation were positively related to disordered eating symptoms throughout the week. In contrast, autonomous and health-focused eating regulation were associated positively with healthy eating behaviours and were either related negatively or unrelated to disordered eating symptoms. Mean level differences in motivation and eating behaviours emerged according to age and weight status. However, the examined structural model was similar for late adolescent and adult dieters and only few differences emerged between normal-weight and overweight dieters.

CONCLUSION

Dieters' type of motivation helps to explain when eating regulation relates to healthy and disordered eating symptoms.

Motivational dynamics of eating regulation: a self-determination theory perspective

Within Western society, many people have difficulties adequately regulating their eating behaviors and weight. Although the literature on eating regulation is vast, little attention has been given to motivational dynamics involved in eating regulation. Grounded in Self-Determination Theory (SDT), the present contribution aims to provide a motivational perspective on eating regulation. The role of satisfaction and thwarting of the basic psychological needs for autonomy, competence, and relatedness is introduced as a mechanism to (a) explain the etiology of body image concerns and disordered eating and (b) understand the optimal regulation of ongoing eating behavior for healthy weight maintenance. An overview of empirical studies on these two research lines is provided. In a final section, the potential relevance and value of SDT in relation to prevailing theoretical models in the domain of eating regulation is discussed. Although research on SDT in the domain of eating regulation is still in its early stages and more research is clearly needed, this review suggests that the SDT represents a promising framework to more thoroughly study and understand the motivational processes involved in eating regulation and associated problems.