Ever wonder why you just can't help reaching for that plate of dessert even though you've eaten your fill? Well researchers say that your brain is the one to blame not being able to stop eating. Researchers led by Rachel Batterham at University College London found that a powerful appetite-suppressing hormone called PYY is behind why people find it difficult to stop eating. As a part of the study published in Nature magazine, the team used functional magnetic resonance imaging to scan the brains of eight people while they received an intravenous drip either of saline or PYY, reports the New Scientist. Half-hour after the scan, the subjects were given an all-you-can-eat buffet of their favourite meals. The researchers noted that when the subjects were given PYY, which effectively mimics having just eaten a big meal, activity increased in their hypothalamus, the part of the brain that controls basal metabolism. However, activity also increased in higher processing areas of the brain involved in reward and pleasure, notably the orbital frontal cortex. They also found that the extent of these changes in brain activity correlated accurately with how many calories each subject would go on to eat at the lunch buffet. For volunteers who were given saline, the researchers noted that it was levels of activity in their hypothalamus that predicted how many calories they would consume, but for those who received PYY, activity levels in their pleasure centres determined how much they ate. Source: ANILIN/C << Oceans Absorbing Only Half As Much Global CO2 Emissions ... Baicalin Skullcap Root Could Help Severe Acute Pancreatitis >> Recommended Reading Missing Gene That Keeps Overeating Mice Thin Identified A new study has identified the missing gene in mice that enables them to stay thin despite overeating. READ MORE Low-calorie Foods for Kids may Lead to Overeating, Obesity Low-calorie foods and drinks that aim at curbing weight problems among children may inadvertently lead to overeating and obesity, says an animal study. READ MORE Decreased Appetite Symptom Evaluation A loss of appetite deprives an individual of essential nutrients and results in weight loss. READ MORE Diet Pills Diet pills are flooding the market by millions. The positive side of diet pills to most people is that they achieve their objective of losing weight. Medical reviews are against the use of diet pills. READ MORE Hungry? - But you Just Ate! Most of us are tempted by good food, mealtime or not. Once in a way is fine but it is dangerous to give into food cravings all the time. READ MORE Increased Appetite Symptom Evaluation An increase in appetite is seen in conditions like bulimia, diabetes, hyperthyroidism and worm infestation. READ MORE Most Popular on Medindia Selfie Addiction Calculator Indian Medical Journals Pregnancy Confirmation Calculator More News on: Diet PillsDecreased Appetite Symptom EvaluationIncreased Appetite Symptom EvaluationHungry? - But you Just Ate!