1. Center for Paralysis Research, Department of Biological Sciences, Program in Neuroscience, Purdue University, West Lafayette, Indiana.
2. Center for Paralysis Research, Department of Basic Medical Sciences, Purdue University, West Lafayette, Indiana.
3. Department of Computer Sciences, Purdue University, West Lafayette, Indiana.
4. Department of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, Indiana.