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| Research article summary (published 30 Mar 2003): |
Attentional set for external information activates the right intraparietal area.
Full Abstract
Visual attention can be allocated to a location or an object by using two different types of information:
internal information and external information. The results of recent psychological studies [Bagon and Egeth, Percept. Psychophys. 55 (1994) 485] suggest that an observer's attentional set determines how these two kinds of information are used in visual tasks. In this study, we measured brain activities during two modes of visual search; one is the feature search mode, in which an attentional set for knowledge of a target item (internal information) is used, and the other is the singleton detection mode, in which an attentional set for oddness in the visual scene (external information) is used. We found extended activation in the frontal and parietal areas for both search modes. In addition, a direct comparison of brain activity during the singleton detection mode and the feature search mode revealed that the areas around the right intraparietal sulcus were more involved in the attentional set for oddness. These results suggest that the human right intraparietal cortex is related to the attentional set for external information.
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Author information
Author/s: Imaruoka, Toshihide (T); Yanagida, Toshio (T); Miyauchi, Satoru (S);
Affiliation: Division of Physiology and Biosignaling, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan. imaru@po.crl.go.jp
Journal and publication information
Publication Type: Journal Article
Journal: Brain research. Cognitive brain research (Brain Res Cogn Brain Res), published in Netherlands. (Language: eng)
Reference: 2003-Apr; vol 16 (issue 2) : pp 199-209
Dates: Created 2003/04/01; Completed 2003/05/29; Revised 2006/11/15;
PMID: 12668228, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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