Chongqing Collaborative Innovation Center for Brain Science 1 article published in JoVE Neuroscience Stimulation Location Determination using a 3D Digitizer with High-Definition Transcranial Direct Current Stimulation Wanting Chen1, Rui Chen1, Qinghua He1,2,3,4,5 1Faculty of Psychology, Southwest University, 2Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, 3Southwest University Branch, Collaborative Innovation Center of Assessment toward Basic Education Quality, Beijing Normal University, 4Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, 5Chongqing Collaborative Innovation Center for Brain Science Presented here is a protocol to achieve higher accuracy in determination of stimulation location combining a 3D digitizer with high-definition transcranial direct current stimulation.