1. Neurosystems Laboratory, Department of Neuroscience, Faculty of Medicine; Universidad de Chile; Santiago 8380453 Chile
2. Department of Physical Therapy, Faculty of Medicine; Universidad de Chile; Santiago 8380453 Chile
3. Department of Physical Therapy, Faculty of Arts and Physical Education; Universidad Metropolitana de Ciencias de la Educación; Santiago 7780450 Chile
4. Swartz Center for Computational Neuroscience, Institute for Neural Computation, University of California San Diego 9500 Gilman Drive, La Jolla; California 92093-0961
5. Biomedical Neuroscience Institute. Universidad de Chile; Santiago 8380453 Chile