Mechanisms of visual attention in the human cortex.

  title={Mechanisms of visual attention in the human cortex.},
  author={Sabine Kastner and Leslie G. Ungerleider},
  journal={Annual review of neuroscience},
A typical scene contains many different objects that, because of the limited processing capacity of the visual system, compete for neural representation. The competition among multiple objects in visual cortex can be biased by both bottom-up sensory-driven mechanisms and top-down influences, such as selective attention. Functional brain imaging studies reveal that, both in the absence and in the presence of visual stimulation, biasing signals due to selective attention can modulate neural… 

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