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  • Title: Central factors contributing to para-contrast modulation of contour and brightness perception.
    Author: Breitmeyer BG, Ziegler R, Hauske G.
    Journal: Vis Neurosci; 2007; 24(2):191-6. PubMed ID: 17640410.
    Abstract:
    Following up on a prior study of contour and brightness processing in visual masking (Breitmeyer et al., 2006), we investigated the effects of a binocular and dichoptic para-contrast masking on the visibility of the contour and brightness of a target presented to the other eye. Combined, the results support the contributions of several cortical processes to para-contrast: (1) two central sources of inhibition, one long-latency and prolonged and the other short-latency and brief; (2) binocular rivalry suppression; and (3) a facilitatory effect peaking at different SOAs for the contour and the brightness tasks, reflecting; (4) known properties of two separate cortical systems, one a fast contour-processing pathway and the other a slower brightness-processing pathway.
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