dc.creatorO´donell, Beatriz Maria
dc.creatorColombo, Elisa Margarita
dc.date.accessioned2020-02-10T19:26:20Z
dc.date.accessioned2022-10-15T11:25:34Z
dc.date.available2020-02-10T19:26:20Z
dc.date.available2022-10-15T11:25:34Z
dc.date.created2020-02-10T19:26:20Z
dc.date.issued2011-08
dc.identifierO´donell, Beatriz Maria; Colombo, Elisa Margarita; Foveal spatial summation in human cone mechanism; Pion Ltd; Perception; 40; 1; 8-2011; 50-62
dc.identifier0301-0066
dc.identifierhttp://hdl.handle.net/11336/97093
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4380611
dc.description.abstractWe measured at the fovea the chromatic contrast threshold for stimuli modulated along different chromatic directions in the isoluminant plane of MBDKL colour space, considering the two cardinal axes (L+M) and S/(L+M) and other intermediate non-cardinal directions. This psychophysical determination was conducted as a function of stimulus size. The test stimulus was a foveal isoluminant Gaussian patch with a raised cosinusoidal temporal profile superimposed on a neutral background. The task was performed binocularly. The increment threshold was measured for three observers by a Bayesian adaptive psychometric method (QUEST). The Ricco area of complete spatial summation was estimated from the threshold-versus-area curves. The perceptive fields are smaller for the L/M-cone opponent direction than the S/(L+M)-cone opponent. The perceptive field sizes for the stimuli in non-cardinal chromatic directions and stimuli modulated at the (L/M)-cone opponent direction present similar values. Measurements were made at two luminance levels, 5 and 40 cd m-2, but the differences found were small. The perceptive field sizes found could be associated with LGN area.
dc.languageeng
dc.publisherPion Ltd
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1068/p6775
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://journals.sagepub.com/doi/10.1068/p6775
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectColor Vision
dc.subjectColor Perception
dc.subjectChromatic Mechanisms
dc.titleFoveal spatial summation in human cone mechanism
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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