Visualization of Brain Immune Response (VIDEO) University of Pennsylvania 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 To understand lymphocyte behavior in the brain, we used two-photon microscopy to visualize effector CD8+ Tcells during toxoplasmic encephalitis. These cells displayed multiple behaviors with two distinct populations of cells apparent: one with a constrained pattern of migration and one with a highly migratory subset. Credit Chris Hunter, University of Pennsylvania Usage Restrictions Please contact Jordan Reese, 215-573-6604 or jreese@upenn.edu 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.