▪ Abstract Single-unit recording studies in the macaque have carefully documented the
modulatory effects of attention on the response properties of visual cortical neurons …

The effects of attention on neuronal responses in visual cortex have been likened to a
change in stimulus contrast. Attention and stimulus contrast both modulate the magnitude of …

Previous single-unit studies of visual cortex have reported that spatial attention modulates
responses to different orientations and directions proportionally, such that it does not change …

Visual attention, which improves perception of attended locations or objects, has long been
known to affect many aspects of the responses of neuronal populations in visual cortex …

Much has been learned over the past 25 years about how attention influences neuronal
responses to stimuli in the visual cortex of monkeys and humans. The most recent studies …

Luck, Steven J., Leonardo Chelazzi, Steven A. Hillyard, and Robert Desimone. Neural
mechanisms of spatial selective attention in areas V1, V2, and V4 of macaque visual cortex …

Previous studies have proposed a variety of mechanisms by which attention influences
neuronal activity. Here we investigated the mechanisms of attention in the striate cortex of …

Evidence for attentional modulation of responses in primary visual cortex has been a matter
of considerable debate. The classical notion concerning attention effects in visual cortex has …

It is well established that attention modulates visual processing in extrastriate cortex.
However, the underlying neural mechanisms are unknown. A consistent observation is that …

Given the properties of muscles (and the laws of physics), it is obviously not possible to
direct the eyes or move an arm to more than one object at a time. What may not be so …