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Attention-spreading Based on Hierarchical Spatial Representations for Connected Objects

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タイトル: Attention-spreading Based on Hierarchical Spatial Representations for Connected Objects
著者: Kasai, Tetsuko 著作を一覧する
発行日: 2010年 1月
出版者: MIT Press
誌名: Journal of Cognitive Neuroscience
巻: 22
号: 1
開始ページ: 12
終了ページ: 22
出版社 DOI: 10.1162/jocn.2008.21158
抄録: Attention selects objects or groups as the most fundamental unit, and this may be achieved through a process in which attention automatically spreads throughout their entire region. Previously, we found that a lateralized potential relative to an attended hemifield at occipito-temporal electrode sites reflects attention-spreading in response to connected bilateral stimuli [Kasai, T., & Kondo, M. Electrophysiological correlates of attention-spreading in visual grouping. NeuroReport, 18, 93-98, 2007]. The present study examined the nature of object representations by manipulating the extent of grouping through connectedness, while controlling the symmetrical structure of bilateral stimuli. The electrophysiological results of two experiments consistently indicated that attention was guided twice in association with perceptual grouping in the early phase (N1, 150-200 msec poststimulus) and with the unity of an object in the later phase (N2pc, 310/330-390 msec). This suggests that there are two processes in object-based spatial selection, and these are discussed with regard to their cognitive mechanisms and object representations.
Rights: © 2008 Massachusetts Institute of Technology
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 河西 哲子


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