Mechanisms of visual attention in the human cortex.

@article{Kastner2000MechanismsOV,
  title={Mechanisms of visual attention in the human cortex.},
  author={Sabine Kastner and Leslie G. Ungerleider},
  journal={Annual review of neuroscience},
  year={2000},
  volume={23},
  pages={
          315-41
        }
}
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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References

SHOWING 1-10 OF 194 REFERENCES

Attentional modulation of visual motion processing in cortical areas MT and MST

TLDR
It is reported that the responses of direction-selective neurons in monkey visual cortex are greatly influenced by attention, and that this modulation occurs as early in the cortical hierarchy as the level of the middle temporal visual area (MT).

Visual attention mediated by biased competition in extrastriate visual cortex.

  • R. Desimone
  • Biology, Psychology
    Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 1998
TLDR
Any enhancing effect of attention is best understood in the context of competitive interactions among neurons representing all of the stimuli present in the visual field, which can be biased in favour of behaviourally relevant stimuli as a result of many different processes.

Selective attention gates visual processing in the extrastriate cortex.

TLDR
The filtering of irrelevant information from the receptive fields of extrastriate neurons may underlie the ability to identify and remember the properties of a particular object out of the many that may be represented on the retina.

Feature-based attention influences motion processing gain in macaque visual cortex

TLDR
Non-spatial, feature-based attentional modulation of visual motion processing is demonstrated, and it is shown that attention increases the gain of direction-selective neurons in visual cortical area MT without narrowing the direction-tuning curves.

Two Modulatory Effects of Attention That Mediate Object Categorization in Human Cortex

TLDR
Attentional modulation of cortical activity was examined by varying the rate of visual stimuli in object categorization tasks according to single and conjoined features and several cortical regions showed attentionally modulated activity.

A neural basis for visual search in inferior temporal cortex

TLDR
The results suggest that inferior temporal cortex is involved in selecting the objects to which the authors attend and foveate, and this area is known to be important for high-level visual processing.

Neural mechanisms of visual selective attention.

  • G. Mangun
  • Psychology, Biology
    Psychophysiology
  • 1995
TLDR
The physiological evidence extends early selection theories by providing neurophysiologically precise information about the stages of visual processing affected by attention and provides physiological evidence for early precategorical selection during visual attention.

Responses of neurons in inferior temporal cortex during memory-guided visual search.

TLDR
The results support a "biased competition" model of attention, according to which objects in the visual field compete for representation in the cortex, and this competition is biased in favor of the behaviorally relevant object by virtue of "top-down" feedback from structures involved in working memory.

A physiological correlate of the 'spotlight' of visual attention

TLDR
A physiological basis for the effects of spatially directed visual attention is identified and retinotopic mapping of attention-related activation was found in primary visual cortex, as well as in dorsomedial and ventral occipital visual areas previously implicated in processing the attended target features.
...