Document Detail

Thalamocortical dynamics of the McCollough effect: boundary-surface alignment through perceptual learning.
MedLine Citation:
PMID:  12044758     Owner:  NLM     Status:  MEDLINE    
This article further develops the FACADE neural model of 3-D vision and figure-ground perception to quantitatively explain properties of the McCollough effect (ME). The model proposes that many ME data result from visual system mechanisms whose primary function is to adaptively align, through learning, boundary and surface representations that are positionally shifted due to the process of binocular fusion. For example, binocular boundary representations are shifted by binocular fusion relative to monocular surface representations, yet the boundaries must become positionally aligned with the surfaces to control binocular surface capture and filling-in. The model also includes perceptual reset mechanisms that use habituative transmitters in opponent processing circuits. Thus the model shows how ME data may arise from a combination of mechanisms that have a clear functional role in biological vision. Simulation results with a single set of parameters quantitatively fit data from 13 experiments that probe the nature of achromatic/chromatic and monocular/binocular interactions during induction of the ME. The model proposes how perceptual learning, opponent processing, and habituation at both monocular and binocular surface representations are involved, including early thalamocortical sites. In particular, it explains the anomalous ME utilizing these multiple processing sites. Alternative models of the ME are also summarized and compared with the present model.
Stephen Grossberg; Seungwoo Hwang; Ennio Mingolla
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  42     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-06-04     Completed Date:  2002-08-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  1259-86     Citation Subset:  IM    
Department of Cognitive and Neural Systems, Center for Adaptive Systems, Boston University, 677 Beacon Street, Boston, MA 02215, USA.
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MeSH Terms
Adaptation, Ocular / physiology*
Color Perception / physiology*
Figural Aftereffect
Learning / physiology*
Models, Neurological*
Vision, Binocular / physiology*

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