The role of oscillatory brain activity in object processing and figure-ground segmentation in human vision

►Alpha, beta and gamma activities are evident at V1/V2 border to figure/ground stimuli. ►High-gamma (> 55 Hz) activity increases while low-gamma (40-55 Hz) decreases. ►Both alpha (8-13 Hz) and beta (13-30 Hz) activities decrease in this region. ►Morphology of the alpha (and beta) activities differs markedly to the gamma activity.