Journal
TRENDS IN NEUROSCIENCES
Volume 34, Issue 4, Pages 210-224Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tins.2011.02.003
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Funding
- Defense Advanced Research Projects Agency [HR0011-10-C-0034]
- National Science Foundation (CRCNS) [BCS-0827764]
- General Motors Corporation
- Army Research Office [W911NF-08-1-0360]
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Attention exhibits characteristic neural signatures in brain regions that process sensory signals. An important area of future research is to understand the nature of top-down signals that facilitate attentional guidance towards behaviorally relevant locations and features. In this review, we discuss recent studies that have made progress towards understanding: (i) the brain structures and circuits involved in attentional allocation; (ii) top-down attention pathways, particularly as elucidated by microstimulation and lesion studies; (iii) top-down modulatory influences involving subcortical structures and reward systems; (iv) plausible substrates and embodiments of top-down signals; and (v) information processing and theoretical constraints that might be helpful in guiding future experiments. Understanding top-down attention is crucial for elucidating the mechanisms by which we can filter sensory information to pay attention to the most behaviorally relevant events.
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