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Autor Serrano Pedraza, Ignacio |
Documentos disponibles escritos por este autor (26)
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Otero Millan, Jorge ; Troncoso, Xoana G ; Macknik, Stephen L ; Serrano Pedraza, Ignacio ; Martinez Conde, Susana | 2008Microsaccades are known to occur during prolonged visual fixation, but it is a matter of controversy whether they also happen during free-viewing. Here we set out to determine: 1) whether microsaccades occur during free visual exploration and vi[...]texto impreso
The perception of the Müller-Lyer illusion has previously been explained as a result of visual low band-pass spatial filtering, although, in fact, the illusion persists in band-pass and high-pass filtered images without visible low-spatial frequ[...]texto impreso
The contrast detection threshold of a grating located in the periphery is increased if a surrounding grating of the same frequency and orientation is present. This inhibition between center and surround has been termed surround suppression. In t[...]texto impreso
Serrano Pedraza, Ignacio ; Hogg, Ellen L ; Read, Jenny C A | 2011At high contrast, duration thresholds for motion direction discrimination deteriorate with increasing stimulus size. This counterintuitive result has been explained by the center-surround antagonism present in the neurons of visual area MT. Conv[...]texto impreso
Because our eyes are set apart horizontally in our head, most disparities between the retinal images are horizontal. However, vertical disparities also occur, and can influence depth perception. The classic example is Ogle's induced effect (K. N[...]texto impreso
Serrano Pedraza, Ignacio ; Read, Jenny C A | 2009Vertical disparities influence the perception of 3D depth, but little is known about the neuronal mechanisms underlying this. One possibility is that these perceptual effects are mediated by an explicit encoding of two-dimensional disparity. Rec[...]texto impreso
Read, Jenny C A ; Phillipson, Graeme P ; Serrano Pedraza, Ignacio ; Milner, A David ; Parker, Andrew J | 2010Both dorsal and ventral cortical visual streams contain neurons sensitive to binocular disparities, but the two streams may underlie different aspects of stereoscopic vision. Here we investigate stereopsis in the neurological patient D.F., whose[...]texto impreso
Stereo vision has a well-known anisotropy: At low frequencies, horizontally oriented sinusoidal depth corrugations are easier to detect than vertically oriented corrugations (both defined by horizontal disparities). Previously, Serrano-Pedraza a[...]texto impreso
Serrano Pedraza, Ignacio ; Sierra Vázquez, Vicente | 2006-11It is known that visual noise added to sinusoidal gratings changes the typical U-shaped threshold curve which becomes flat in log-log scale for frequencies below 10c/deg when gratings are masked with white noise of high power spectral density le[...]texto impreso
Serrano Pedraza, Ignacio ; Herbert, William ; Villa Laso, Laura ; Widdall, Michael ; Vancleef, Kathleen ; Read, Jenny C A | 2016-03-01PURPOSE Human vision has a puzzling stereoscopic anisotropy: horizontal depth corrugations are easier to detect than vertical depth corrugations. To date, little is known about the function or the underlying mechanism responsible for this anisot[...]texto impreso
Serrano Pedraza, Ignacio ; Manjunath, Vina ; Osunkunle, Olaoluwakitan ; Clarke, Michael P ; Read, Jenny C A | 2011-04PURPOSE To investigate the cortical mechanisms that prevent diplopia in intermittent exotropia (X(T)) during binocular alignment (orthotropia). METHODS The authors studied 12 X(T) patients aged 5 to 22 years. Seventy-five percent had function[...]