Activated Neurons (VIDEO) University of California - Berkeley 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 In this video, activated neurons in a small chunk of the somatosensory cortex of a mouse fluoresce green. Those neurons that are activated by holographic laser light are indicated by a purple arrow. Projected via a microscope through a window into the brain, the holographic system can activate 50 neurons at a time within the small brain region, up to 300 times a second, to simulate real brain activity and insert false sensations. Credit Stephen McNally and Roxanne Makasdjian video using Alan Mardinly footage 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.