Advanced Institutes of Convergence Technology 1 article published in JoVE Neuroscience Imaging Membrane Potential with Two Types of Genetically Encoded Fluorescent Voltage Sensors Sungmoo Lee1,2, Hong Hua Piao2, Masoud Sepheri-Rad2, Arong Jung2,3, Uhna Sung2, Yoon-Kyu Song1,4, Bradley J. Baker2 1Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, 2Center for Functional Connectomics, Korea Institute of Science and Technology, 3College of Life Sciences and Biotechnology, Korea University, 4Advanced Institutes of Convergence Technology A method for imaging changes in membrane potential using genetically encoded voltage indicators is described.