Abstract
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.
Original language | English (US) |
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Title of host publication | Cognitive Electrophysiology of Attention: Signals of the Mind |
Publisher | Elsevier Inc. |
Pages | 136-151 |
Number of pages | 16 |
ISBN (Print) | 9780123984517 |
DOIs | |
State | Published - Oct 2013 |
Keywords
- Attention
- Baseline shift
- Feature attention
- FMRI
- Preparatory attention
- Visual features
ASJC Scopus subject areas
- Neuroscience(all)