作者单位:Laboratoire des Systèmes Perceptifs, CNRS UMR 8248, and Ecole Normale Superieure, Paris, France[1]Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK[2]Institute of Neuroscience, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK[3]