1-Different features are represented by different neurons. This results in binding problems if there are multiple objects. 2-Neuronal responses to features that need to be grouped together are enhanced. This solves the binding problem. 3-The response enhancements are a correlate of visual attention that is directed to the features that are grouped. 4-In a spatial cueing task the rate enhancement starts at a location and its spreads to other features at this location. 5-In a visual search task the rate enhancement starts at a shape or other feature and spreads to the location. 6-In a contour grouping task the rate enhancement spreads to all neurons that respond to segments of a curve.

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