Fig. 1.

Potential onset and goal-directed attention actions on shifting receptive field (RF) activity. A: while the monkey looks at a fixation point (red cross), a RF can be mapped (red dotted circle). As the monkey prepares to make a saccade from the fixation point to a peripheral target (blue cross), there is an anticipatory shift of the RF of the neuron to a future spatial location. This future field (FF) location (blue dotted circle) is at the same location with respect to the final eye position after the saccade (blue dotted circle to blue cross) as the RF is to the current fixation point (red dotted circle to red cross). B: 2 types of attention act at the time of the RF shift. First, as the monkey makes the saccade to the target, there is a shift in goal-directed, or endogenous, attention to the target. Second, the single stimulus flashed against a dark background at the FF location produces an onset, or exogenous, attention effect.