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  • Title: Neural correlates of shape-from-shading.
    Author: Hou C, Pettet MW, Vildavski VY, Norcia AM.
    Journal: Vision Res; 2006 Mar; 46(6-7):1080-90. PubMed ID: 16321419.
    Abstract:
    Visual evoked potentials were recorded during presentation of a single stimulus that generated bi-stable perceptual alternation between two different three-dimensional percepts. One interpretation (asymmetric) changed depth structure from flat to corrugated in depth and the other (symmetric) had the appearance of a flat surface translating laterally behind a set of apertures. Responses during perception of the asymmetric three-dimensional structure contained larger negative components than did responses during perception of the symmetric three-dimensional structure. Control experiments suggest that the interpretation of depth structure is selected after junction information caused by the interplay between shading and object shape is extracted.
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