10476963

Source:http://linkedlifedata.com/resource/pubmed/id/10476963

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0036019, umls-concept:C0234621, umls-concept:C0333051, umls-concept:C0392673, umls-concept:C0449738
pubmed:issue	6747
pubmed:dateCreated	1999-9-23
pubmed:abstractText	A central problem in human vision is to explain how the visual world remains stable despite the continual displacements of the retinal image produced by rapid saccadic movements of the eyes. Perceived stability has been attributed to 'efferent-copy' signals, representing the saccadic motor commands, that cancel the effects of saccade-related retinal displacements. Here we show, by means of a perceptual illusion, that traditional cancellation theories cannot explain stability. The perceptual illusion was produced by first inducing adaptive changes in saccadic gain (ratio of saccade size to target eccentricity). Following adaptation, subjects experienced an illusory mislocalization in which widely separated targets flashed before and after saccades appeared to be in the same place. The illusion shows that the perceptual system did not take the adaptive changes into account. Perceptual localization is based on signals representing the size of the initially-intended saccade, not the size of the saccade that is ultimately executed. Signals representing intended saccades initiate a visual comparison process used to maintain perceptual stability across saccades and to generate the oculomotor error signals that ensure saccadic accuracy.
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/0410462
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	Aug
pubmed:issn	0028-0836
pubmed:author	pubmed-author:BahcallD ODO, pubmed-author:KowlerEE
pubmed:issnType	Print
pubmed:day	26
pubmed:volume	400
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	864-6
pubmed:dateRevised	2006-11-15
pubmed:meshHeading	pubmed-meshheading:10476963-Adaptation, Physiological, pubmed-meshheading:10476963-Humans, pubmed-meshheading:10476963-Optical Illusions, pubmed-meshheading:10476963-Saccades, pubmed-meshheading:10476963-Visual Perception
pubmed:year	1999
pubmed:articleTitle	Illusory shifts in visual direction accompany adaptation of saccadic eye movements.
pubmed:affiliation	Department of Psychology, Rutgers University, Piscataway, New Jersey 08854, USA.
pubmed:publicationType	Journal Article, Research Support, U.S. Gov't, Non-P.H.S.