Border ownership selectivity in human early visual cortex and its modulation by attention

Date
2009
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Source Title
The Journal of Neuroscience
Print ISSN
0270-6474
Electronic ISSN
1529-2401
Publisher
Society for Neuroscience
Volume
29
Issue
2
Pages
460 - 465
Language
English
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Abstract

Natural images are usually cluttered because objects occlude one another. A critical aspect of recognizing these visual objects is to identify the borders between image regions that belong to different objects. However, the neural coding of border ownership in human visual cortex is largely unknown. In this study, we designed two simple but compelling stimuli in which a slight change of contextual information could induce a dramatic change of border ownership. Using functional MRI adaptation, we found that border ownership selectivity in V2 was robust and reliable across subjects, and it was largely dependent on attention. Our study provides the first human evidence that V2 is a critical area for the processing of border ownership and that this processing depends on the modulation from higher-level cortical areas.

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Published Version (Please cite this version)