dc.creator | O´donell, Beatriz Maria | |
dc.creator | Colombo, Elisa Margarita | |
dc.date.accessioned | 2020-02-10T19:26:20Z | |
dc.date.accessioned | 2022-10-15T11:25:34Z | |
dc.date.available | 2020-02-10T19:26:20Z | |
dc.date.available | 2022-10-15T11:25:34Z | |
dc.date.created | 2020-02-10T19:26:20Z | |
dc.date.issued | 2011-08 | |
dc.identifier | O´donell, Beatriz Maria; Colombo, Elisa Margarita; Foveal spatial summation in human cone mechanism; Pion Ltd; Perception; 40; 1; 8-2011; 50-62 | |
dc.identifier | 0301-0066 | |
dc.identifier | http://hdl.handle.net/11336/97093 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4380611 | |
dc.description.abstract | We 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.language | eng | |
dc.publisher | Pion Ltd | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1068/p6775 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://journals.sagepub.com/doi/10.1068/p6775 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | Color Vision | |
dc.subject | Color Perception | |
dc.subject | Chromatic Mechanisms | |
dc.title | Foveal spatial summation in human cone mechanism | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |