Abstract：
:The brain effortlessly recognizes objects even when the visual information belonging to an object is widely separated, as well demonstrated by the Kanizsa-type illusory contours (ICs), in which a contour is perceived despite the fragments of the contour being separated by gaps. Such large-range visual completion has long been thought to be preattentive, whereas its dependence on top-down influences remains unclear. Here, we report separate modulations by spatial attention and task relevance on the neural activities in response to the ICs. IC-sensitive event-related potentials that were localized to the lateral occipital cortex were modulated by spatial attention at an early processing stage (130-166 ms after stimulus onset) and modulated by task relevance at a later processing stage (234-290 ms). These results not only demonstrate top-down attentional influences on the neural processing of ICs but also elucidate the characteristics of the attentional modulations that occur in different phases of IC processing.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wu X,Zhou L,Qian C,Gan L,Zhang Ddoi
10.1038/srep08346subject
Has Abstractpub_date
2015-02-10 00:00:00pages
8346issn
2045-2322pii
srep08346journal_volume
5pub_type
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