Effects Of Preparatory Attention To Nonspatial Features In The Visual Cortex
COGNITIVE ELECTROPHYSIOLOGY OF ATTENTION: SIGNALS OF THE MIND(2014)
摘要
Selective attention boosts neural responses to visual stimuli at attended locations or with attended features. Studies have also demonstrated attention-related changes in neural activity in regions coding the attended location or feature before the onset of visual stimuli. Several theories propose that these preparatory “baseline shifts” reflect top-down attentional biasing and may themselves modulate stimulus-driven neural responses. While location-specific preparatory activity is observed consistently for spatial attention, the evidence for analogous feature-specific activity during attention to nonspatial features is mixed. In this chapter, we review evidence for feature-specific preparatory attention effects in the sensory cortex and consider the factors that might influence whether they are observed.
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关键词
attention
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