Do Overweight People Have Worse Cognitive Flexibility? Cues-Triggered Food Craving May Have a Greater Impact

Background: Overweight people have been revealed to have poor cognitive flexibility. Cognitive flexibility reflects proactive and reactive control abilities. However, the impairment had not been explicitly positioned at the cognitive stage. Therefore, this study provides increased support for impairment of cognitive flexibility due to overweight. Method: The study included 34 overweight and 35 normal-weight participants. They were required to complete the food and flower target AX-continuous performance test (AX–CPT), including the resting-state fMRI and cue-triggered food craving subscales. We compared the performance difference between the two tasks. Furthermore, we investigated whether the cue-triggered food cravings and the corresponding brain regions mediated the effect of overweight on the two control mechanisms. Result: Significant differences were found only in the food target AX-CPT task, where overweight participants performed worse. Cue-triggered food cravings mediated this relationship. Additionally, we found that the brain regions associated with cue-triggered food cravings (bilateral SFG) can completely mediate the relationship between BMI and the z-value of the fat mass index and sensitivity to proactive control. Conclusion: In the food target task, overweight participants performed worse in both control mechanisms. Moreover, we also revealed the potential mechanism by which being overweight might affect the two control mechanisms through cue-triggered food cravings.

Cognitive Defusion as Strategy to Reduce the Intensity of Craving Episodes and Improve Eating Behavior

The elaborated intrusion theory of desire proposes that craving is a cognitive motivational process involving intrusive thoughts. Changing the way we react to them, cognitive defusion (CD), should limit thought elaboration and craving. We induced chocolate craving in female chocolate cravers before CD (Study 1). A decrease in craving measured by a single-item scale, Visual Analogical Scale (VAS; p < .001, ηp2 = .449) and as a state, State Food Craving Questionnaire (FCQ-S; p = .029, ηp2 = .106) were found in the experimental group, while similar results were also found in group control. The reduction in craving (VAS) in group CD correlated negatively with chocolate consumption on a bogus taste test (r = –.439, p = .036), while the correlation was positive in the case of group control (r = .429, p = .047). Food craving as a trait, measured by the Trait Food Craving Questionnaire (FCQ-T), showed negative correlations with measures of CD and mindfulness skills (lowest r = –.313, p = .018). In Study 2 participants made use of a smartphone application implementing the CD procedure in real contexts whenever they experienced food craving. A corresponding decline in self-reported craving was found, as well as in consumption of the craved food (indulgence) compared with the control condition. Our findings indicate that CD may be a promising intervention for tackling the elaboration of intrusive thoughts and eating behavior in young female food cravers, both in a controlled laboratory environment after a cue-food exposure craving induction procedure, as well as responding to naturally occurring food cravings in real-life settings.

Neurobiological regulation of eating behavior: Evidence based on non-invasive brain stimulation

The prefrontal cortex is appreciated as a key neurobiological player in human eating behavior. A special focus is herein dedicated to the dorsolateral prefrontal cortex (DLPFC), which is critically involved in executive function such as cognitive control over eating. Persons with obesity display hypoactivity in this brain area, which is linked to overconsumption and food craving. Contrary to that, higher activity in the DLPFC is associated with successful weight-loss and weight-maintenance. Transcranial direct current stimulation (tDCS) is a non-invasive neurostimulation tool used to enhance self-control and inhibitory control. The number of studies using tDCS to influence eating behavior rapidly increased in the last years. However, the effectiveness of tDCS is still unclear, as studies show mixed results and individual differences were shown to be an important factor in the effectiveness of non-invasive brain stimulation. Here, we describe the current state of research of human studies using tDCS to influence food intake, food craving, subjective feeling of hunger and body weight. Excitatory stimulation of the right DLPFC seems most promising to reduce food cravings to highly palatable food, while other studies provide evidence that stimulating the left DLPFC shows promising effects on weight loss and weight maintenance, especially in multisession approaches. Overall, the reported findings are heterogeneous pointing to large interindividual differences in tDCS responsiveness.

Food Craving in Obese Subjects: Its Correlation with Atherogenic Index and Feeding Behavior-Related Gene Expression

Obesity is influenced by environmental, behavioral, and genetic factors; particularly genes related to the regulation of lipids and addictive behavior. Food craving (FC) is a physiological and behavioral response that triggers the intense desire to ingest food, particularly food with high energy, fat, and/or sweet content. Objective: To evaluate the relationship between the prevalence of FC in obese subjects and blood lipids as well as to determine the transcriptional modulation of CART, DRD2, and FTO. Method: Transverse, comparative, and randomized study including 21 obese participants (BMI, ≥30 kg/m2] and 20 normal weight participants (BMI, ≤25 kg/m2). We determined CART, DRD2, and FTO expressions; evaluated blood lipid levels; and obtained trait scores on the Food Craving Questionnaire-Trait, a multifactorial instrument validated for the Mexican population. Results: The DRD2 expression was significantly increased (p = 0.027) and the CART expression was significantly decreased (p = 0.001) in obese participants compared with normal weight participants. The FTO expression did not show significant differences. Food Craving Questionnaire-Trait showed scores of ≥72 in obese participants. Conclusions: Linear regression model analysis showed that FC is a predictor of atherogenic index (ATH), independently of BMI, and of the gene expression modulation of CART and DRD2.

Effects of Game Situation-Dependent Emotions on Sport Spectators’ Food Craving

This study sought to challenge prevalent accounts of emotional eating by exploring the effects of situation-dependent emotions on consumers’ food craving. Four specific game situations in the context of spectator sports, each corresponding to the four types of emotional coping (outcome-desire conflict, avoidance, fulfillment, and pursuit), were identified as follows: decisive victories, decisive losses, close victories, and close losses. By employing laboratory-based virtual reality spectatorship, Study 1 tested the causal effects of happiness (fulfillment), anger (conflict), sadness (conflict), fear (avoidance), and hope (pursuit) on food craving. Study 2 further designed fans’ previous association between emotions and eating as a moderating mechanism in the context of online sport viewership. The results of the two experiments supported the three theoretical principles of eating behavior, including the “food as fuel” principle of anger, the hedonic eating principle of happiness, and the self-regulation principle of hope. However, the results rejected the escape awareness principle of sadness and fear. The study concludes with a discussion of context-dependent emotional positioning and intervention strategies for marketers and policy makers.

Food Cravings And Personality Traits In Pregnant Women: Is There An Association?

Background: Food craving is a common phenomenon during pregnancy, but explanation on how this behaviour can happen remains unclear. This behaviour may be influenced by personality traits that have been known to linked with obesity and addiction affecting pregnancy outcome. Therefore, we identified the prevalence of food craving and evaluated its relationship with personality traits in pregnant women. Methods: We conducted a cross-sectional survey involving 500 healthy pregnant women in urban area of Jakarta, Indonesia. Food cravings were assessed using a translated and validated Food Craving Inventory of Indonesian version. Personality traits were determined by using a Big Five Personality Trait Short Questionnaire that has been translated and validated for Indonesians. Association of personality traits and food cravings were analysed by binary logistic regression.Results: The mean age of pregnant women was 28.3 + 5.3 years. Food craving prevalence in in this population was 63.8%. The most common personality trait in this study was conscientiousness (65.5%). Neuroticism trait was significantly associated with food cravings with OR 9.146 [95% CI: 2.76-30.4; p-value <0.05]. Conclusion: Large proportion of Indonesian pregnant women had food craving living in urban area of Jakarta. A high neuroticism trait has a strong association with food cravings during pregnancy that indicates potential influence of personality traits to this problem. If personality traits influence the food choice in pregnant women, it may subsequently influence nutritional intake of the pregnant women and it may affect pregnancy outcome.

Disordered Eating among People with Schizophrenia Spectrum Disorders: A Systematic Review

Disordered eating, or abnormal eating behaviours that do not meet the criteria for an independent eating disorder, have been reported among people with schizophrenia. We aimed to systematically review literature on disordered eating among people with schizophrenia spectrum disorder (SSD). Seven databases were systematically searched for studies that described the prevalence and correlates of disordered eating among patients with SSD from January 1984 to 15 February 2021. Qualitative analysis was performed using the National Institutes of Health scales. Of 5504 records identified, 31 studies involving 471159 subjects were included in the systematic review. The majority of studies (17) rated fair on qualitative analysis and included more men, and participants in their 30s and 40s, on antipsychotics. The commonest limitations include lack of sample size or power calculations, poor sample description, not using valid tools, or not adjusting for confounders. The reported rates were 4.4% to 45% for binge eating, 16.1% to 64%, for food craving, 27% to 60.6% for food addiction, and 4% to 30% for night eating. Positive associations were re-ported for binge eating with antipsychotic use and female gender, between food craving and weight gain, between food addiction and increased dietary intake, and between disordered eating and female gender, mood and psychotic symptoms. Reported rates for disordered eating among people with SSD are higher than those in the general population. We will discuss the clinical, treatment and research implications of our findings.