When we record EEG from electrode arrays on occipitoparietal scalp, in
normal subjects we find that EEG that's phase-locked to the stimulus is
modulated up and background EEG is modulated down in the hemisphere
contralateral to the attended hemifield. As attention shifts,
so does the pattern of EEG modulation.
`fMRI Evidence for Generalised Arousal as a Substitute for Early Selection in Autism during Conditions of Shifting Visual Spatial Attention', Matthew Belmonte, 10 November 2001
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