Graduate Program in Neuroscience, University of Minnesota, Minneapolis, Minnesota, United States of America.|Department of Mechanical Engineering, University of California, Santa Barbara, California, United States of America.|Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota, United States of America.|Department of Mechanical Engineering, University of California, Santa Barbara, California, United States of America.|Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota, United States of America.