Guido TDCS_Scientific Reports (IMAGE) Johns Hopkins University Caption A study participant undergoing noninvasive brain stimulation sits at the surgical robot console using virtual reality simulations of needle-driving exercises. Credit Guido Caccianiga/Johns Hopkins University. Usage Restrictions none License Original 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.