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      Computational evidence for a rivalry hierarchy in vision.

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          Abstract

          Cortical-form vision comprises multiple, hierarchically arranged areas with feedforward and feedback interconnections. This complex architecture poses difficulties for attempts to link perceptual phenomena to activity at a particular level of the system. This difficulty has been especially salient in studies of binocular rivalry alternations, where there is seemingly conflicting evidence for a locus in primary visual cortex or alternatively in higher cortical areas devoted to object perception. Here, I use a competitive neural model to demonstrate that the data require at least two hierarchic rivalry stages for their explanation. This model demonstrates that competitive inhibition in the first rivalry stage can be eliminated by using suitable stimulus dynamics, thereby revealing properties of a later stage, a result obtained with both spike-rate and conductance-based model neurons. This result provides a synthesis of competing rivalry theories and suggests that neural competition may be a general characteristic throughout the form-vision hierarchy.

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          Author and article information

          Journal
          Proc Natl Acad Sci U S A
          Proceedings of the National Academy of Sciences of the United States of America
          Proceedings of the National Academy of Sciences
          0027-8424
          0027-8424
          Nov 25 2003
          : 100
          : 24
          Affiliations
          [1 ] Centre for Vision Research and Department of Biology, York University, 4700 Keele Street, Toronto, ON, Canada M3J 1P3. hrwilson@yorku.ca
          Article
          2333622100
          10.1073/pnas.2333622100
          283620
          14612564
          8b06ff30-dc1e-4811-b5e8-5c61199bc056
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