Microglia (IMAGE) University of Notre Dame Caption Microglia thought to be restricted to the central nervous system, enters the peripheral nervous system at the site of brachial plexus injury. Credit University of Notre Dame 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.