Cortical Dynamics of Form and Motion Integration: Persistence, Apparent Motion, and Illusory Contours


Show simple item record Francis, Gregory en_US Grossberg, Stephen en_US 2011-11-14T18:46:34Z 2011-11-14T18:46:34Z 1994-03 en_US
dc.description.abstract How does the visual system generate percepts of moving forms? How does this happen when the forms are emergent percepts, such as illusory contours or segregated textures, and the motion percept is apparent motion between the emergent forms? We develop a neural model of form-motion interactions to explain and simulate parametric properties of psychophysical motion data and to make predictions about how the parallel cortical processing streams Vl→MT and Vl→V2→MT control form-rotation interactions. The model explains how an illusory contour can move in apparent motion to another illusory contour or to a luminance derived contour; how illusory contour persistence relates to the upper ISI threshold for apparent motion; and how upper and lower ISI thresholds for seeing apparent motion between two flashes decrease with stimulus duration and narrow with spatial separation (Korte's laws). The model accounts for these data. by suggesting how the persistence of a. boundary segmentation in the Vl→V2 processing stream influences the quality of apparent motion in the Vl→MT stream through V2→MT' interactions. These data may all be explained by an analysis of how orientationally tuned form perception mechanisms and directionally tuned motion perception mechanisms interact. en_US
dc.description.sponsorship Air Force Office of Scientific Research (90-0175, 90-0083); Office of Naval Research (N00014-91-J-4100); National Science Foundation Graduate Fellowship en_US
dc.language.iso en_US en_US
dc.publisher Boston University Center for Adaptive Systems and Department of Cognitive and Neural Systems en_US
dc.relation.ispartofseries BU CAS/CNS Technical Reports;CAS/CNS-TR-1994-011 en_US
dc.rights Copyright 1994 Boston University. Permission to copy without fee all or part of this material is granted provided that: 1. The copies are not made or distributed for direct commercial advantage; 2. the report title, author, document number, and release date appear, and notice is given that copying is by permission of BOSTON UNIVERSITY TRUSTEES. To copy otherwise, or to republish, requires a fee and / or special permission. en_US
dc.subject Form perception en_US
dc.subject Motion perception en_US
dc.subject Neural networks en_US
dc.subject Visual cortex en_US
dc.subject Visual persistence en_US
dc.subject Apparent motion en_US
dc.subject Korte's laws en_US
dc.title Cortical Dynamics of Form and Motion Integration: Persistence, Apparent Motion, and Illusory Contours en_US
dc.type Technical Report en_US
dc.rights.holder Boston University Trustees en_US

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