Fruit Fly (image) Max-Planck-Gesellschaft Caption A tasty meal becomes an unforgettable reward -- especially when we are hungry. This is also true for fruit flies. Scientists have now discovered a group of dopamine neurons signalling sugar reward in the fly brain. Credit Dr. Pavel Masek Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.