Blood Vessel Constriction (VIDEO) Cell Press This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Specialized microscope looking into the live mouse brain reveals that smooth muscle cells (cyan) surrounding blood vessels abnormally constrict during and after stroke causing permanent vessel blockage. This phenomenon could worsen the injury in stroke and provides a new target for potential drugs to improve stroke outcome. Credit Courtesy of Grutzendler et al./Neuron 2015 Usage Restrictions Credit Required. 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.