Suzhou University of Science and Technology 1 article published in JoVE Behavior Tactile Semiautomatic Passive-Finger Angle Stimulator (TSPAS) Wu Wang1, Jiajia Yang2,4, Yinghua Yu2,3,4, Qiong Wu5,2, Satoshi Takahashi2, Yoshimichi Ejima2, Jinglong Wu6,2 1Cognitive Neuroscience Laboratory, Graduate School of Natural Science and Technology, Okayama University, 2Cognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3Center for Information and Neural Networks, National Institute of Information and Communications Technology, 4Section on Functional Imaging Methods, National Institute of Mental Health, 5School of Education, Suzhou University of Science and Technology, 6Beijing Institute of Technology Presented is the tactile semiautomated passive-finger angle stimulator TSPAS, a new way to assess tactile spatial acuity and tactile angle discrimination using a computer-controlled tactile stimulus system that applies raised angle stimuli to a subject's passive fingerpad, while controlling for movement speed, distance, and contact duration.