Illusory Contour Perception and Amodal Boundary Completion: Evidence of a Dissociation Following Callosotomy

Autor:	Robert Shapley, Paul M. Corballis, Michael S. Gazzaniga, Robert Fendrich
Rok vydání:	1999
Předmět:	Adult Male Communication Epilepsy Dissociation (neuropsychology) Optical Illusions business.industry Cognitive Neuroscience media_common.quotation_subject Amodal perception Middle Aged Corpus Callosum Form Perception Form perception Perception Illusory contours Humans Regression Analysis Female Percept Right hemisphere Psychology business media_common Cognitive psychology
Zdroj:	Journal of Cognitive Neuroscience. 11:459-466
ISSN:	1530-8898 0898-929X
DOI:	10.1162/089892999563535
Popis:	A fundamental problem in form perception is how the visual system can link together spatially separated contour fragments to form the percept of a unitary shape. Illusory contours and amodal completion are two phenomena that demonstrate this linking process. In the present study we investigate these phenomena in the divided hemispheres of two callosotomy (“split-brain”) patients. The data suggest that dissociable neural mechanisms are responsible for the generation of illusory contours and amodal completion. Although both cerebral hemispheres appear to be equally capable of perceiving illusory contours, amodal completion is more readily utilized by the right hemisphere. These results suggest that illusory contours may be attributable to low-level visual processes common to both hemispheres, whereas amodal completion reflects a higher-level, lateralized process.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91af9ffa750e9062ec9199b707bf5ec4 https://doi.org/10.1162/089892999563535 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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