What is eaten and how it bears on mind and body.
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Qurʾān
القرآن6 shownVerses named for this subject by hand come first. The rest are found by the subject’s own Arabic and English senses and are shown as lexical matches, not as anchors anyone has confirmed.
Qur'ān 6:141English sense: eat | Arabic sense: تسرفوا, كلوا
۞وَهُوَ ٱلَّذِيٓ أَنشَأَ جَنَّٰتࣲ مَّعۡرُوشَٰتࣲ وَغَيۡرَ مَعۡرُوشَٰتࣲ وَٱلنَّخۡلَ وَٱلزَّرۡعَ مُخۡتَلِفًا أُكُلُهُۥ وَٱلزَّيۡتُونَ وَٱلرُّمَّانَ مُتَشَٰبِهࣰ ا وَغَيۡرَ مُتَشَٰبِهࣲۚ كُلُواْ مِن ثَمَرِهِۦٓ إِذَآ أَثۡمَرَ وَءَاتُواْ حَقَّهُۥ يَوۡمَ حَصَادِهِۦۖ وَلَا تُسۡرِفُوٓاْۚ إِنَّهُۥ لَا يُحِبُّ ٱلۡمُسۡرِفِينَ
It is He who produces both trellised and untrellised gardens, date palms, crops of diverse flavours, the olive, the pomegranate, alike yet different. So when they bear fruit, eat some of it, paying what is due on the day of harvest, but do not be wasteful: God does not like wasteful people
Qur'ān 7:31English sense: eat | Arabic sense: تسرفوا, كلوا
۞يَٰبَنِيٓ ءَادَمَ خُذُواْ زِينَتَكُمۡ عِندَ كُلِّ مَسۡجِدࣲ وَكُلُواْ وَٱشۡرَبُواْ وَلَا تُسۡرِفُوٓاْۚ إِنَّهُۥ لَا يُحِبُّ ٱلۡمُسۡرِفِينَ
Children of Adam, dress well whenever you are at worship, and eat and drink [as We have permitted] but do not be extravagant: God does not like extravagant people
Qur'ān 5:88Arabic sense: كلوا | English sense: eat, lawful and good
وَكُلُواْ مِمَّا رَزَقَكُمُ ٱللَّهُ حَلَٰلࣰ ا طَيِّبࣰ اۚ وَٱتَّقُواْ ٱللَّهَ ٱلَّذِيٓ أَنتُم بِهِۦ مُؤۡمِنُونَ
but eat the lawful and good things that God provides for you. Be mindful of God, in whom you believe
Qur'ān 25:20Arabic sense: الطعام, طعام | English sense: eat
وَمَآ أَرۡسَلۡنَا قَبۡلَكَ مِنَ ٱلۡمُرۡسَلِينَ إِلَّآ إِنَّهُمۡ لَيَأۡكُلُونَ ٱلطَّعَامَ وَيَمۡشُونَ فِي ٱلۡأَسۡوَاقِۗ وَجَعَلۡنَا بَعۡضَكُمۡ لِبَعۡضࣲ فِتۡنَةً أَتَصۡبِرُونَۗ وَكَانَ رَبُّكَ بَصِيرࣰ ا
No messenger have We sent before you [Muhammad] who did not eat food and walk about in the marketplace. But We have made some of you a means of testing others- will you stand fast? Your Lord is always watching
Qur'ān 25:7English sense: eat | Arabic sense: الطعام, طعام
وَقَالُواْ مَالِ هَٰذَا ٱلرَّسُولِ يَأۡكُلُ ٱلطَّعَامَ وَيَمۡشِي فِي ٱلۡأَسۡوَاقِ لَوۡلَآ أُنزِلَ إِلَيۡهِ مَلَكࣱ فَيَكُونَ مَعَهُۥ نَذِيرًا
They also say, ‘What sort of messenger is this? He eats food and walks about in the marketplaces! Why has no angel been sent down to help him with his warnings
Qur'ān 2:57English sense: eat | Arabic sense: كلوا
وَظَلَّلۡنَا عَلَيۡكُمُ ٱلۡغَمَامَ وَأَنزَلۡنَا عَلَيۡكُمُ ٱلۡمَنَّ وَٱلسَّلۡوَىٰۖ كُلُواْ مِن طَيِّبَٰتِ مَا رَزَقۡنَٰكُمۡۚ وَمَا ظَلَمُونَا وَلَٰكِن كَانُوٓاْ أَنفُسَهُمۡ يَظۡلِمُونَ
We made the clouds cover you with shade, and sent manna and quails down to you, saying, ‘Eat the good things We have provided for you.’ It was not Us they wronged; they wronged themselves
Tafsīr
التفسير6 shownCommentary on the verses above, at most two editions per verse.
en-asbab-al-nuzul-by-al-wahidi on 7:31en-asbab-al-nuzul-by-al-wahidicommentary on an ayah this subject surfaced
O children of Adam! Put on your adornment at every place of prostration. In the tongue of learning, this is the curtaining of the pudendum during the prayer. In the tongue of unveiling, the adornment of every servant is in the station of contemplating the heart's presence, clinging to the Presence, and the continuity of witnessing the Haqiqah. It has been said that the adornment of the worshiper's soul is the traces of prostration, and the adornment of the recognizer's heart is the lights of finding. The worshiper has the attribute of servanthood in the prostration, and the recognizer is on the carpet of proximity in the repose of witnessing.
en-al-jalalayn on 6:141en-al-jalalayncommentary on an ayah this subject surfaced
And He it is Who produces creates gardens orchards trellised extending along the ground as in the case of watermelons and untrellised rising upwards on a stem such as palm-trees; and He produces palm-trees and crops diverse in flavour diverse in the shape and savour of its fruit and seed and olives and pomegranates alike in terms of their leaf mutashābihan ‘alike’ is a circumstantial qualifier and unlike in terms of their savour. Eat of the fruit thereof when it ripens before its maturity passes and pay the due thereof the alms as appropriate on the day of its harvest read yawma hasādahu or yawma hasādihi that is one tenth or half of it and do not be prodigal by giving it all away so that nothing remains for the consumption of your dependants. Truly God does not love the prodigal who overstep the bounds of that which He has delimited for them.
en-al-jalalayn on 7:31en-al-jalalayncommentary on an ayah this subject surfaced
O Children of Adam! Don your adornment that which covers your nakedness at every place of worship at prayer and at the circumambulation and eat and drink what you want but do not be excessive; He truly does not love those who are excessive.
en-tafisr-ibn-kathir on 6:141en-tafisr-ibn-kathircommentary on an ayah this subject surfaced
And it is He Who produces gardens Ma'rushat and not Ma'rushat, and date palms, and crops of different shape and taste, and olives, and pomegranates, similar, and different. Eat of their fruit when they ripen, but pay the due thereof on the day of their harvest, and waste not by extravagance. Verily, He likes not the wasteful (141)And of the cattle (are some) for burden and (some smaller) for Farsh. Eat of what Allah has provided for you, and follow not the footsteps of Shaytan. Surely, he is to you an open enemy (142)
Allah Created the Produce, Seed Grains and Cattle
Allah states that He created everything, including the produce, fruits and cattle that the idolators mishandled by their misguided ideas, dividing them into various designated parts, allowing some and prohibiting some. Allah said,
وَهُوَ الَّذِي أَنشَأَ جَنَّاتٍ مَّعْرُوشَاتٍ وَغَيْرَ مَعْرُوشَاتٍ
(And it is He Who produ
en-al-jalalayn on 5:88en-al-jalalayncommentary on an ayah this subject surfaced
And eat of the lawful and good food which God has provided you halālan tayyiban ‘lawful and good food’ is the direct object and the preceding genitive construction mimmā ‘of … which’ is a circumstantial qualifier connected to the former; and fear God in Whom you are believers.
en-tafisr-ibn-kathir on 5:88en-tafisr-ibn-kathircommentary on an ayah this subject surfaced
O you who believe! Make not unlawful the good things which Allah has made lawful to you, and transgress not. Verily, Allah does not like the transgressors (87)And eat of the things which Allah has provided for you, lawful and good, and have Taqwa of Allah in Whom you believe (88)
There is No Monasticism in Islam
Ali bin Abi Talhah said that Ibn 'Abbas said, "This Ayah [5:87] was revealed about some of the Companions of the Prophet ﷺ who said, 'We should cut off our male organs, abandon the desires of this life and travel in the land, just as the Ruhban (monks) do.' When the Prophet ﷺ heard of this statement, he summoned them and asked them if they made this statement and they answered 'Yes.' The Prophet ﷺ said,
لٰكِنِّي أَصُومُ وَأُفْطِرُ، وَأُصَلِّي، وَأَنَامُ، وَأَنْكِحُ النِّسَاءَ، فَمَنْ أَخَذَ بِسُنَّتِي فَهُوَ مِنِّي، وَمَنْ لَمْ يَأْخُذْ بِسُنَّتِي فَلَيْسَ مِنِّي
(I fast and
Research library, full list
1326 to 1350 of 1,410Determinants of fast-food consumption. An application of the Theory of Planned Behaviour.
This study applied and extended the Theory of Planned Behaviour (TPB; Ajzen, 1988) in an examination of the variables influencing fast-food consumption in an Australian sample. Four hundred and four participants responded to items measuring TPB constructs and retrospective and prospective measures of fast-food consumption. Additional independent variables included: Consideration of Future Consequences (Strathman, Gleicher, Boninger, & Edwards, 1994), Fear of Negative Evaluation (Leary, 1983), and Self-Identification as a Healthy Eater Scale (Armitage & Conner, 1999a). Structural Equation Modeling (SEM) was used to examine predictors of consumption. SEM indicated that the TPB successfully predicted fast-food consumption. Factor analyses assisted in the definition of constructs that underlay attitudes towards fast foods. These constructs were included in an 'extended' TPB model which then …
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Focusing attention on the health aspects of foods changes value signals in vmPFC and improves dietary choice.
Attention is thought to play a key role in the computation of stimulus values at the time of choice, which suggests that attention manipulations could be used to improve decision-making in domains where self-control lapses are pervasive. We used an fMRI food choice task with non-dieting human subjects to investigate whether exogenous cues that direct attention to the healthiness of foods could improve dietary choices. Behaviorally, we found that subjects made healthier choices in the presence of health cues. In parallel, stimulus value signals in ventromedial prefrontal cortex were more responsive to the healthiness of foods in the presence of health cues, and this effect was modulated by activity in regions of dorsolateral prefrontal cortex. These findings suggest that the neural mechanisms used in successful self-control can be activated by exogenous attention cues, and provide insight…
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Immediate pleasures and future consequences. A neuropsychological study of binge eating and obesity.
Longitudinal data indicate that our capacity for adaptive self-regulation is a relatively stable predisposition that appears in childhood and predicts future life successes. In 2004, we published the first study demonstrating decision-making deficits in overweight/obese adult women. The present study is an extension of these findings. We assessed obese women with (n=65) and without (n=73) binge-eating disorder (BED), and a group (n=71) of normal-weight women, on two neuropsychological tests: the Iowa Gambling Task and a Delay Discounting measure. The BED and obese groups had worse performance scores on both tasks compared to normal controls, but did not differ from each other. These findings suggest that adaptive decision-making and the ability to delay gratification may influence our eating behaviours, particularly in a food environment where effortful control of energy intake is essent…
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Ego depletion--is it all in your head? implicit theories about willpower affect self-regulation.
Much recent research suggests that willpower--the capacity to exert self-control--is a limited resource that is depleted after exertion. We propose that whether depletion takes place or not depends on a person's belief about whether willpower is a limited resource. Study 1 found that individual differences in lay theories about willpower moderate ego-depletion effects: People who viewed the capacity for self-control as not limited did not show diminished self-control after a depleting experience. Study 2 replicated the effect, manipulating lay theories about willpower. Study 3 addressed questions about the mechanism underlying the effect. Study 4, a longitudinal field study, found that theories about willpower predict change in eating behavior, procrastination, and self-regulated goal striving in depleting circumstances. Taken together, the findings suggest that reduced self-control afte…
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Adolescent toothbrushing and the home environment: sociodemographic factors, family relationships and mealtime routines and disorganisation.
Objectives: Previous studies have shown that sociodemographic factors are associated with adolescent toothbrushing. While there has been some investigation of parental modelling of oral health behaviour and the association between parental support and oral health, there has been no investigation of the home environment and its effect on oral health behaviour. The current study examines variables related to the family, including mealtime routines and family relationships to determine the best predictors of adolescent toothbrushing.
Methods: Data from the 2006 Health Behaviour in School-Aged Children Survey were modelled using logistic univariate and multivariable modelling with outcome variable twice-a-day toothbrushing.
Results: Higher family socioeconomic and affluence were significantly associated with greater odds of toothbrushing twice a day or more. Family structure was also signifi…
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Comprehensive interview assessment of eating behavior 18-35 months after gastric bypass surgery for morbid obesity.
Background: Weight loss surgery induces a marked change in eating behavior. However, not much work has been done characterizing the eating behavior after weight loss surgery. We conducted a detailed analysis of patients' eating behavior 18-35 months after Roux-en-Y gastric bypass surgery, determined whether preoperative eating disorders might be associated with non-normative postoperative eating, and examined the association of such eating behaviors with weight loss and psychopathology.
Methods: A sample of 59 patients who had undergone Roux-en-Y gastric bypass was interviewed in person after surgery about a range of eating behaviors, including binge eating, chewing and spitting out food, picking at and nibbling food, and nocturnal eating and compensatory behaviors such as vomiting and laxative and diuretic misuse. An established semistructured interview was used. The prevalence of preop…
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Long-tailed macaques display unexpected waiting abilities in exchange tasks.
The ability of animals to delay gratification is crucial for complex goal-directed action. It may help them in making effective decisions when facing a choice. We tested the ability of nine long-tailed macaques (Macaca fascicularis) to delay gratification in several experiments. In exchange tasks, subjects had to keep a small piece of cookie before returning it to an experimenter in order to get a larger food amount. Results showed that animals could wait between 10 s and 10 min depending on individual and sizes of reward. In another experiment, subjects could immediately give back the initial piece of cookie then wait for the return. Their performances more than doubled, demonstrating the role of consumption inhibition in postponing gratification. Such achievements underscore delays of gratification which until now were not thought possible in monkeys. Finally, subjects were presented w…
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Neighbourhood food environment and area deprivation: spatial accessibility to grocery stores selling fresh fruit and vegetables in urban and rural settings.
Background: The 'deprivation amplification' hypothesis suggests that residents of deprived neighbourhoods have universally poorer access to high-quality food environments, which in turn contributes to the development of spatial inequalities in diet and diet-related chronic disease. This paper presents results from a study that quantified access to grocery stores selling fresh fruit and vegetables in four environmental settings in Scotland, UK.
Methods: Spatial accessibility, as measured by network travel times, to 457 grocery stores located in 205 neighbourhoods in four environmental settings (island, rural, small town and urban) in Scotland was calculated using Geographical Information Systems. The distribution of accessibility by neighbourhood deprivation in each of these four settings was investigated.
Results: Overall, the most deprived neighbourhoods had the best access to grocery s…
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Maladaptive eating patterns, quality of life, and weight outcomes following gastric bypass: results of an Internet survey.
Bariatric surgery is the most effective treatment for severe obesity. However, evidence suggests that maladaptive eating behaviors such as binge eating, grazing, and a loss of control when eating may impact postsurgical weight outcomes. The current study sought to characterize the weight outcomes, eating patterns, and perceived health-related quality of life of individuals 3-10 years following gastric bypass (GBP) surgery and to assess the relationships between eating behaviors, weight outcomes, and quality of life. Eligible participants (N = 497) completed an Internet survey of their eating behaviors, health-related quality of life, and weight history. Participants self-reported a mean maximum postsurgical loss of 81% of their excess weight and maintained a mean weight loss of 70% 3-10 years following surgery (mean 4.2 years). Eighty-seven percent reported weight regain ranging from 1 t…
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Feeding your feelings: emotion regulation strategies and emotional eating.
The process by which emotions affect eating behavior emerges as one of the central unresolved questions in the field of emotional eating. The present studies address the hypothesis that the regulation strategies people use to deal with these emotions are responsible for increased eating. Negative emotions were induced and intake of comfort food and non-comfort food was measured by means of taste tests. Emotion induction was preceded by measuring individual differences in emotion regulation strategies (Study 1) or by instructions to regulate emotions in either an adaptive (reappraisal) or maladaptive (suppression) manner (Study 2). Study 3 also entailed a control condition without any regulation instructions. Relative to reappraisal and spontaneous expression, suppression led to increased food intake, but only of the comfort foods. Emotions themselves were not responsible for this effect.…
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Delay of gratification in capuchin monkeys (Cebus apella) and squirrel monkeys (Saimiri sciureus).
In two separate series of experiments four capuchin monkeys (Cebus apella) and four squirrel monkeys (Saimiri sciureus) were given demonstration trials in which a human transferred six pieces of food, one by one, from out of each monkey's reach to within reach. On test trials the monkey could reach for the transferred food at any time, an action that ended the trial. Therefore, it was in the monkey's interest to allow food items to accumulate before reaching for food. No capuchin monkey showed delay of gratification in the first phase of testing. An attempt to facilitate performance by presenting a single free food item immediately before the transfer failed (Phase 2). In Phase 3, when the transferred food items increased progressively in size, two capuchins maintained delays, and frequently waited for all 6 items to accumulate. One squirrel monkey started to delay gratification in Phase…
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Body mass correlates inversely with inhibitory control in response to food among adolescent girls: an fMRI study.
Self-report and behavioral data suggest that impulsivity may contribute to the development and maintenance of obesity. Neuroimaging studies implicate a widespread neural network in inhibitory control and suggest that impulsive individuals show hypoactivity in these regions during tasks requiring response inhibition. Yet, research has not directly tested whether body mass correlates inversely with activation of these regions during response inhibition tasks. The present study used functional magnetic resonance imaging (fMRI) to investigate neural activations during a food-specific go/no-go task in adolescent girls ranging from lean to obese. When required to inhibit prepotent responses to appetizing food, body mass index (BMI) correlated with response inhibition at both the behavioral and neural levels, with more overweight adolescents showing greater behavioral evidence of impulsivity as…
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Parent behavior and child weight status among a diverse group of underserved rural families.
The purpose of this study was threefold: to investigate the association between three parenting behaviors (parenting style, feeding style, and feeding practices), to evaluate whether these behaviors were associated with child weight, and to determine whether style (parenting and feeding) moderated the relationship between feeding practice and child weight. Ninety-nine parent-child dyads were recruited for a cross-sectional study where parents self-reported their parenting style, feeding style, and feeding practices along with demographic characteristics. Height and weight were measured for each dyad. The relationship between parenting style and feeding style showed modest agreement. Feeding style, but not parenting style, was associated with child BMI z-score while controlling for known covariates. An indulgent feeding style was associated with a higher child weight status. Multiple regr…
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Chronic vagus nerve stimulation decreased weight gain, food consumption and sweet craving in adult obese minipigs.
Chronic vagus nerve stimulation (VNS) is known to influence food intake and body weight in animals and humans. The aim of our work was to evaluate the effects of long-term VNS in adult obese minipigs. Eight minipigs were fed ad libitum a Western diet to cause obesity, after which half of the animals were implanted with bilateral vagal electrodes connected to constant current stimulators (2mA, 30Hz, 500-μs pulse, ON 30s, OFF 5min). The other animals were implanted with sham devices. Animals were weighed weekly and their daily consumption was measured. Still 14 weeks after surgery, VNS animals (70.3±3.3kg, P>0.10) did not significantly gain weight compared to sham animals (80.6±8.0kg, P<0.05). Furthermore, food consumption decreased in VNS animals (-18%, P<0.02) compared to sham animals (+1%, P>0.10). When subjected to a three-choice meal test (high-fat vs. high-carbohydrates vs. balanced …
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Parenting style and family meals: cross-sectional and 5-year longitudinal associations.
Background: Research on family meals in the past decade has shown a positive association between family meal frequency and adolescent healthy dietary intake. However, less is known about factors within the home environment, such as parenting style, that may be associated with family meal patterns.
Objective: The purpose of this study is to test cross-sectional and 5-year longitudinal associations between parenting styles (authoritative, authoritarian, permissive, and neglectful) and the frequency of family meals among adolescents.
Study design: Data were from Project Eating Among Teens, a population-based study comprised of youth from diverse ethnic/racial and socioeconomic backgrounds. Two cohorts of adolescents (middle school and high school) completed in-class surveys in 1999 (Time 1) and mailed surveys in 2004 (Time 2). Multiple linear regression models were used to predict mean freq…
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Stereotype threat spillover: how coping with threats to social identity affects aggression, eating, decision making, and attention.
Stereotype threat spillover is a situational predicament in which coping with the stress of stereotype confirmation leaves one in a depleted volitional state and thus less likely to engage in effortful self-control in a variety of domains. We examined this phenomenon in 4 studies in which we had participants cope with stereotype and social identity threat and then measured their performance in domains in which stereotypes were not "in the air." In Study 1 we examined whether taking a threatening math test could lead women to respond aggressively. In Study 2 we investigated whether coping with a threatening math test could lead women to indulge themselves with unhealthy food later on and examined the moderation of this effect by personal characteristics that contribute to identity-threat appraisals. In Study 3 we investigated whether vividly remembering an experience of social identity th…
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Insulin resistance in children: consensus, perspective, and future directions.
Objective: Emerging data indicate that insulin resistance is common among children and adolescents and is related to cardiometabolic risk, therefore requiring consideration early in life. However, there is still confusion on how to define insulin resistance, how to measure it, what its risk factors are, and whether there are effective strategies to prevent and treat it. A consensus conference was organized in order to clarify these points.
Participants: The consensus was internationally supported by all the major scientific societies in pediatric endocrinology and 37 participants.
Evidence: An independent and systematic search of the literature was conducted to identify key articles relating to insulin resistance in children.
Consensus process: The conference was divided into five themes and working groups: background and definition; methods of measurement and screening; risk factors and…
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David DJ, Samuels BA, Rainer Q, Wang JW, Marsteller D, Mendez I, Drew M, Craig DA, Guiard BP, Guilloux JP, Artymyshyn RP, Gardier AM, Gerald C, Antonijevic IA, Leonardo ED, Hen R (2009)MEDLINE-indexed journal, not yet read by usNeuron996 citations Neurogenesis-dependent and -independent effects of fluoxetine in an animal model of anxiety/depression.
Understanding the physiopathology of affective disorders and their treatment relies on the availability of experimental models that accurately mimic aspects of the disease. Here we describe a mouse model of an anxiety/depressive-like state induced by chronic corticosterone treatment. Furthermore, chronic antidepressant treatment reversed the behavioral dysfunctions and the inhibition of hippocampal neurogenesis induced by corticosterone treatment. In corticosterone-treated mice where hippocampal neurogenesis is abolished by X-irradiation, the efficacy of fluoxetine is blocked in some, but not all, behavioral paradigms, suggesting both neurogenesis-dependent and -independent mechanisms of antidepressant action. Finally, we identified a number of candidate genes, the expression of which is decreased by chronic corticosterone and normalized by chronic fluoxetine treatment selectively in the…
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Changes in BMI and blood pressure after a school based intervention: the CHILDREN study.
Background: Identification of the behavioural, normative and control beliefs influencing children's behaviour is an important prerequisite in designing effective interventions. The current study aims to evaluate the effectiveness of an intervention program, based on the Theory of Planned Behaviour (TPB), on obesity indices and blood pressure (BP) in Ioannina, Greece.
Methods: Participants were 646 fifth grade pupils (360 girls and 286 boys). The intervention group (IG) consisted of 321 children in 13 randomly selected schools while the rest (n = 325 children) served as the control group (CG). Based on the outcome of the TPB questionnaire, the intervention focused on overcoming the barriers in accessing physical activity areas, increasing the availability of fruits and vegetables and increasing parental support. General linear mixed model and mediating variable analysis were used to evalu…
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Population dynamics constrain the cooperative evolution of cross-feeding.
Cross-feeding is the exchange of nutrients among species of microbes. It has two potential evolutionary origins, one as an exchange of metabolic wastes or byproducts among species, the other as a form of cooperation known as reciprocal altruism. This paper explores the conditions favoring the origin of cooperative cross-feeding between two species. There is an extensive literature on the evolution of cooperation, and some of the requirements for the evolution of cooperative cross-feeding follow from this prior work-specifically the requirement that interactions be limited to small groups of individuals, such as colonies in a spatially structured environment. Evolution of cooperative cross-feeding by a species also requires that cross-feeding from the partner species already exists, so that the cooperating mutant will automatically be reciprocated for its actions. Beyond these considerati…
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Effect of intermittent fasting on circadian rhythms in mice depends on feeding time.
Calorie restriction (CR) resets circadian rhythms and extends life span. Intermittent fasting (IF) also extends life span, but its affect on circadian rhythms has not been studied. To study the effect of IF alongside CR, we imposed IF in FVB/N mice or IF combined with CR using the transgenic FVB/N alphaMUPA mice that, when fed ad libitum, exhibit spontaneously reduced eating and extended life span. Our results show that when food was introduced during the light period, body temperature peak was not disrupted. In contrast, IF caused almost arrhythmicity in clock gene expression in the liver and advanced mPer2 and mClock expression. However, IF restored the amplitudes of clock gene expression under disruptive light condition regardless whether the animals were calorically restricted or not. Unlike daytime feeding, nighttime feeding yielded rhythms similar to those generated during ad libit…
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An animal model of compulsive food-taking behaviour.
The increase in the incidence of obesity and eating disorders has promoted research aimed at understanding the aetiology of abnormal eating behaviours. Apart from metabolic factors, obesity is caused by overeating. Clinical reports have led to the suggestion that some individuals may develop addictive-like behaviours when consuming palatable foods, and compulsive eating plays a similar dominant role in obesity as compulsive drug taking does in drug addiction. The progress made in the development of treatment strategies for obesity is limited, in part, because the physiological and neurological causes and consequences of compulsive eating behaviour are not clearly understood and cannot readily be studied in human subjects. We have developed experimental approaches that reflect the functioning of the components of eating control, including compulsive food taking in rats. Rats that are give…
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The orbitofrontal cortex and ventral tegmental area are necessary for learning from unexpected outcomes.
Humans and other animals change their behavior in response to unexpected outcomes. The orbitofrontal cortex (OFC) is implicated in such adaptive responding, based on evidence from reversal tasks. Yet these tasks confound using information about expected outcomes with learning when those expectations are violated. OFC is critical for the former function; here we show it is also critical for the latter. In a Pavlovian overexpectation task, inactivation of OFC prevented learning driven by unexpected outcomes, even when performance was assessed later. We propose this reflects a critical contribution of outcome signaling by OFC to encoding of reward prediction errors elsewhere. In accord with this proposal, we report that signaling of reward predictions by OFC neurons was related to signaling of prediction errors by dopamine neurons in ventral tegmental area (VTA). Furthermore, bilateral inac…
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Association between adult attention deficit/hyperactivity disorder and obesity in the US population.
Attention deficit hyperactivity disorder (ADHD) is a neurobehavioral disorder that affects approximately 2.9-4.7% of US adults. Studies have revealed high rates of ADHD (26-61%) in patients seeking weight loss treatment suggesting an association between ADHD and obesity. The objective of the present study was to test the association between ADHD and overweight and obesity in the US population. Cross-sectional data from the Collaborative Psychiatric Epidemiology Surveys were used. Participants were 6,735 US residents (63.9% white; 51.6% female) aged 18-44 years. A retrospective assessment of childhood ADHD and a self-report assessment of adult ADHD were administered. Diagnosis was defined by three categories: never met diagnostic criteria, met full childhood criteria with no current symptoms, and met full childhood criteria with current symptoms. The prevalence of overweight and obesity w…
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Health behaviors from early to late midlife as predictors of cognitive function: The Whitehall II study.
The authors examined associations of health behaviors over a 17-year period, separately and in combination, with cognition in late midlife in 5,123 men and women from the Whitehall II study (United Kingdom). Health behaviors were assessed in early midlife (mean age = 44 years; phase 1, 1985-1988), in midlife (mean age = 56 years; phase 5, 1997-1999), and in late midlife (mean age = 61 years; phase 7, 2002-2004). A score of the number of unhealthy behaviors (smoking, alcohol abstinence, low physical activity, and low fruit and vegetable consumption) was defined as ranging from 0 to 4. Poor (defined as scores in the worst sex-specific quintile) executive function and memory in late midlife (phase 7) were analyzed as outcomes. Compared with those with no unhealthy behaviors, those with 3-4 unhealthy behaviors at phase 1 (odds ratio (OR) = 1.84, 95% confidence interval (CI): 1.27, 2.65), pha…
matched on Feeding Behavior (mesh)