Differentiating CFS from GWI (IMAGE) Georgetown University Medical Center Caption The insula region of the brain (right column) has greater activation in chronic fatigue syndrome than in healthy controls or those with Gulf War illness. The cerebellum (middle column) has less activation in Gulf War illness than healthy controls or chronic fatigue syndrome. The brainstem has less activation (left column) in Gulf War illness and greater activation in chronic fatigue syndrome. These differences emerge after exercise. Credit Stuart Washington Usage Restrictions None License Licensed 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.