作者单位:Center for Sensorimotor Neural Engineering, University of Washington, Box 37, 1414 NE 42nd St., Seattle, WA 98105, USA[1]Neural Systems Laboratory, Department of Computer Science and Engineering, University of Washington, Box 352350, Seattle, WA 98105, USA[2]Graduate Training Center of Neuroscience, International Max Planck Research School, University of Tübingen, Tübingen, Germany[3]