Other physiological factors such as, hypothalamic and mesolimbic endocannabinoids, enhance appetite by stimulating neurochemical pathways underlying both homeostatic and rewarding aspects of food intake. Endocannabinoids are involved in food-related reward mechanisms, and there are increasing evidence that these mechanisms are dysregulated in AN patients. Moreover, functional neuroimaging studies have demonstrated decreased food-related stimuli in brain areas of the mesolimbic reward system in AN patients.