Figure 2 (IMAGE) Radiological Society of North America Caption (a) Maps show the topography of chronic ischemic lesions associated with global cognitive impairment. (b) Maps show the topography of chronic ischemic lesions associated with impaired fluency. L = left, R = right. Credit Radiological Society of North America Usage Restrictions May use with credit. 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.