| Spontaneous EEG oscillations reveal periodic sampling of visual attention. | |
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MedLine Citation:
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PMID: 20805482 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An important effect of sustained attention is the facilitation of perception. Although the term "sustained" suggests that this beneficial effect endures continuously as long as something is attended, we present electrophysiological evidence that perception at attended locations is actually modulated periodically. Subjects detected brief light flashes that were presented peripherally at locations that were either attended or unattended. We analyzed the correlation between detection performance for attended and unattended stimuli and the phase of ongoing EEG oscillations, which relate to subsecond fluctuations of neuronal excitability. Although on average, detection performance was improved by attention--indicated by reduced detection thresholds at attended locations--we found that detection performance for attended stimuli actually fluctuated over time along with the phase of spontaneous oscillations in the (≈7 Hz) frequency band just before stimulus onset. This fluctuation was absent for unattended stimuli. This pattern of results suggests that "sustained" attention in fact exerts its facilitative effect on perception in a periodic fashion. |
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Authors:
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Niko A Busch; Rufin VanRullen |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-08-30 |
Journal Detail:
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Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 107 ISSN: 1091-6490 ISO Abbreviation: Proc. Natl. Acad. Sci. U.S.A. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-15 Completed Date: 2010-10-28 Revised Date: 2011-07-26 |
Medline Journal Info:
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Nlm Unique ID: 7505876 Medline TA: Proc Natl Acad Sci U S A Country: United States |
Other Details:
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Languages: eng Pagination: 16048-53 Citation Subset: IM |
Affiliation:
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Institute of Medical Psychology, Charité-Universitätsmedizin, 10099 Berlin, Germany. niko.busch@hu-berlin.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Attention* Electroencephalography Female Humans Male Visual Perception* |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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