Analysis of spiking synchrony in visual cortex reveals distinct types of top-down modulation signals for spatial and object-based attention
Fig 9
Overlapping squares as an example of cluttered scenes.
In this illustration, the light-gray “foreground” square appears in front of the darker “background” rectangle; the perception is not that of a light-gray square adjacent to a darker L-shaped object. Red and black circles mark T and L junctions, respectively, and are not part of the visual display. Such local cues modulate the responses of BOS cells in addition to the grouping cell inputs discussed in the present study [25].