Transcranial Direct Current Stimulation (IMAGE) DOE/Sandia National Laboratories Caption Sandia National Laboratories cognitive scientist Mike Trumbo adjusts the placement of a transcranial direct current stimulation unit on cognitive scientist Laura Matzen's head. Though Trumbo has tried tDCS dozens of times, he does not use it to boost his own brain. Credit (Photo by Randy Montoya) 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.