a K. Activities in the frontal cortex and gait performance are 795 modulated by preparation. An fN1RS study Neuroimage 39: 600-607, 2008 796 797 Tallon-Baudr) C. Bertrand O, Delpuech C. Pernier J. Oscillatory y-Band (30-70 Hz) activity 798 induced by a visual search task in humans. J. Neurosci 17(2): 722