Abstract

A monkey, leaping from tree to tree, eyes the location of his next grasp and scans the surrounding for the yellow of bananas; then he pauses, captivated by a snake entwining a nearby branch. Locations, features and objects can all be the units of attentional selection [1] but what are the neural underpinnings of these three forms of attention? Space- and feature-based attention hold a natural appeal for visual neuroscientists because the functional organization of visual cortex into retinotopic maps and feature columns preferentially coupled to other columns with like preferences [2] seems to provide an ideal substrate.

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