Wild-Type Neuronal Excitation (VIDEO) Harvard Medical School This video is under embargo. Please login to access this video. Caption New research links excess neural activity -- the flickering light seen in this image -- to reduced longevity. Credit Yankner lab, Harvard Medical School 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.