Fruit fly dorsal fan-shaped body (IMAGE) WashU Medicine Caption The dorsal fan-shaped body pictured is a structure in the brains of fruit flies that controls their sleep behavior. Researchers at Washington University School of Medicine in St. Louis and the University of Missouri, Kansas City, have found that brain neurons in the dorsal fan-shaped body adapt to help the flies stay awake despite tiredness in dangerous situations and help them fall asleep after an intense day. Credit Joseph "Dave" Jones Usage Restrictions This image is to be used in accordance with the mission, policies and guidelines of Washington University in St. Louis. Visit https://wustl.edu/about/compliance-policies/media-policies/multimedia-use/ for more information. License Original content 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.