Alliesthesia is greater for odors of fatty foods than of non-fat foods

International audience; Alliesthesia is the modulation of the rewarding value of a stimulus according to the internal state (hungry or satiated). This study aimed to evaluate this phenomenon as a function of the nature of the stimulus (odors evoking edible and non-edible items, and the food odors evoking fatty and non-fat foods) and to compare the effectiveness of two reward evaluations (measures of pleasantness and appetence) to reveal alliesthesia. The results showed that both fatty and non-fat food odors were judged as less pleasant and less appetent when the subjects were satiated than when they were hungry, whereas no such difference was observed for non-food odors. There was a greater…

The neural networks underlying the liking and wanting responses to food odors are modified in bulimia nervosa

The neural networks underlying the liking and wanting responses to food odors are modified in bulimia nervosa. 25. Congress of the european chemoreception research organisation (ECRO)

The Neural networks underlying the liking and wanting responses to food odors are modified in anorexia nervosa

The Neural networks underlying the liking and wanting responses to food odors are modified in anorexia nervosa. 25. Congress of the european chemoreception research organisation (ECRO)

Activity of neural reward circuits in response to food odors: an fMRI study of liking and wanting

Dysfunction of the mesolimbic circuit to food odors in women with anorexia and bulimia nervosa: A fMRI study

Brain reward dysfunction in eating disorders has been widely reported. However, whether the neural correlates of hedonic and motivational experiences related to food cues are differentially affected in anorexia nervosa of restrictive type (ANr), bulimia nervosa (BN), and healthy control (HC) participants remains unknown. Here, 39 women (14 ANr, 13 BN, and 12 HC) underwent fMRI while smelling food or non-food odors in hunger and satiety states during liking and wanting tasks. ANr and BN patients reported less desire to eat odor-cued food and odor-cued high energy-density food (EDF), respectively. ANr patients exhibited lower ventral tegmental area (VTA) activation than BN patients to food od…

Reward for food odors: An fMRI study of liking and wanting as a function of metabolic state and BMI

Brain reward systems mediate liking and wanting for food reward. Here, we explore the differential involvement of the following structures for these two components: the ventral and dorsal striatopallidal area, orbitofrontal cortex (OFC), anterior insula, and anterior cingulate. Twelve healthy female participants were asked to rate pleasantness (liking of food and non-food odors) and the desire to eat (wanting of odor-evoked food) during event-related functional magnetic resonance imaging (fMRI). The subjective ratings and fMRI were performed in hunger and satiety states. Activations of regions-of-interest were compared as a function of task (liking vs. wanting), odor category (food vs. non-…

The Neural networks underlying the liking and wanting responses to food odors are modified in anorexia nervosa

International audience

Satiation-related changes in olfactory hedonismheterogeneous effects for food and non-food odours

Subliminal fear priming potentiates negative facial reactions to food pictures in women with anorexia nervosa.

BackgroundTo investigate hedonic reactivity and the influence of unconscious emotional processes on the low sensitivity to positive reinforcement of food in anorexia nervosa (AN).MethodAN and healthy women were exposed to palatable food pictures just after a subliminal exposure to facial expressions (happy, disgust, fear and neutral faces), either while fasting or after a standardized meal (hungerversussatiety). Both implicit [facial electromyographic (EMG) activity from zygomatic and corrugator muscles, skin conductance, heart rate, and videotaped facial behavior] and explicit (self-reported pleasure and desire) measures of affective processes were recorded.ResultsIn contrast to healthy wo…