Figure 7From: Electrical neuroimaging evidence that spatial frequency-based selective attention affects V1 activity as early as 40-60 ms in humansGrand-average ERPs recorded to location-relevant and irrelevant gratings presented in the upper and lower hemi-spaces, independent of stimulus spatial frequency, and recorded at POz site and right lateral occipital site (RLO). Spatial attention effects were positive in nature.Back to article page