1. From the Human Cortical Physiology Section and Stroke Neurorehabilitation Clinic (E.B., C.W., L.G.C., M.A.D., T.A., A.F.), NINDS, NIH, Bethesda, Md; Department of Experimental Psychology (E.B.), University of Oxford, UK; Institute of Medical Psychology and Behavioral Neurobiology (C.W., C.B., J.M., A.C., S.S., A.F., N.B.), MEG-Center, University of Tübingen, Germany.