Department of Physics, University of South Florida, Tampa, Florida 33620, United States of America.|Department of Cell Biology and Neuroscience, University of California, Riverside, California 92501 United States of America.|Humboldt-Universität zu Berlin, 10115 Berlin, Germany.|School of Mathematics and Statistics, University of Sydney, New South Wales, 2006, Australia.|Center for Neural Engineering, Departments of Engineering Science and Mechanics, Neurosurgery, and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States of America.