1Neuroscience, Brown University, Providence, RI 02912, United States
2Center for Neurorestoration and Neurotechnology, Rehabilitation R&D Service, Veterans Affairs Medical Center, Providence, RI 02908, United States
3Brown Institute for Brain Science, Brown University, Providence, RI 02912, United States
4School of Engineering, Brown University, Providence, RI 02912, United States
5Neurology, Massachusetts General Hospital, Boston, MA 02114, United States
6Neurology, Harvard Medical School, Boston, MA 02115, United States
7Neurosurgery, Massachusetts General Hospital, Boston, MA 02114, United States
8Neuroscience, Harvard Medical School, Boston, MA 02115, United States