| Selective attention modulates electrical responses to reversals of optic-flow direction. | |
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MedLine Citation:
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PMID: 20100503 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Attended stimuli typically evoke larger event-related potentials (ERPs) than unattended stimuli. We previously reported an exception when an optic-flow pattern is interleaved with stationary dots. Reversals of motion direction evoked a larger N200 peak when attention was directed to the stationary dots. We replicated and further characterized this result: the N200 enhancement was eliminated when the dots moved randomly rather than in optic flow. The effect was also attenuated with isoluminant stimuli. Electrical source analysis suggested the attentional modulation of a configuration of dorsal extrastriate generators. The ERP evoked by reversals of optic flow may reflect the operation of independently configurable attentional filters within visual cortex. |
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Authors:
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Matthew S Tata; Nazia Alam; Aja L O Mason; Gregory Christie; Andrew Butcher |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-01-25 |
Journal Detail:
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Title: Vision research Volume: 50 ISSN: 1878-5646 ISO Abbreviation: Vision Res. Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: England |
Other Details:
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Languages: eng Pagination: 750-60 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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The University of Lethbridge, 4401 University Drive, Lethbridge AB T1K 3M4, Canada. matthew.tata@uleth.ca |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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