On spectral sensitivity in the goldfish. Evidence for neural interactions between different "cone mechanisms".

abstract：:Contours are believed to play a key role in the visual analysis of scenes by the primate brain. In dynamic scenes, the presence of contours is often signaled by discontinuities in motion fields. However, it is unclear whether the motion fields over which the visual system extracts discontinuities, correspond to the lo...

journal_title：Vision research

authors： Sinha P

更新日期：2001-03-01 00:00:00

abstract：:Sex differences in macular pigment (MP) optical density (measured psychophysically) were examined. Concentrations of lutein and zeaxanthin (L and Z) (non-separated) and beta-carotene (BC) in the blood were determined using reverse phase high-performance liquid chromatography. Dietary intake of L and Z, BC, fat, and ir...

journal_title：Vision research

authors： Hammond BR Jr,Curran-Celentano J,Judd S,Fuld K,Krinsky NI,Wooten BR,Snodderly DM

更新日期：1996-07-01 00:00:00

abstract：:Two mechanisms, one for the detection of fast, and the other for slow movement of a sinusoidal grating are identified, and investigated under central, parafoveal, and peripheral viewing conditions. The fast movement data is considered in terms of the Reichardt model, in which signals from two adjacent inputs are cross...

journal_title：Vision research

authors： Murray I,MacCana F,Kulikowski JJ

更新日期：1983-01-01 00:00:00

abstract：:The perceived size of 'P' and 'p' is influenced by their vertical position relative to nearby letters. In the experiments reported here, we show that uppercase 'P' appears smallest when it is displaced downward toward the letter's lowercase position, whereas lowercase 'p' appears largest when it is near the uppercase ...

journal_title：Vision research

authors： Katz M,Pola J

更新日期：2000-01-01 00:00:00

abstract：:It has been suggested that schizophrenia is associated with a magnocellular deficit. This would predict a loss of contrast sensitivity at low spatial and/or at high temporal frequencies. We here review research that tested contrast sensitivity in individuals with schizophrenia. We find that the results of this researc...

journal_title：Vision research

authors： Skottun BC,Skoyles JR

更新日期：2007-10-01 00:00:00

abstract：:Two uncorrelated random dot patterns were superimposed and alternated to produce dynamic incoherent noise. When a low spatial frequency sine wave grating was optically superimposed on this noise and moved in step with the alternation of the two frames, the incoherent motion was masked and all the dots were seen to adh...

journal_title：Vision research

authors： Ramachandran VS,Cavanagh P

更新日期：1987-01-01 00:00:00

abstract：:Sensitivity to the sudden displacement (phase shift) of a single monocularly presented sinusoidal grating is increased when a static grating of similar spatial frequency is presented to the same eye. If the static grating is presented to the other eye instead sensitivity is, at best, halved. This demonstration implies...

journal_title：Vision research

authors： Badcock DR,Derrington AM

更新日期：1987-01-01 00:00:00

abstract：:The sustained component of visual attention lowers the perceptual threshold of stimuli located at the attended region. Attentional performance is not equal for all eccentric positions, leading to variations in perception. The location of the preferred retinal locus (PRL) for fixation might be influenced by these atten...

journal_title：Vision research

authors： Barraza-Bernal MJ,Ivanov IV,Nill S,Rifai K,Trauzettel-Klosinski S,Wahl S

更新日期：2017-11-01 00:00:00

abstract：:Velocity matching using the method of Constant Stimuli shows that perceived velocity varies with contrast [Thompson, P. (1982). Perceived rate of movement depends upon contrast. Vision Research, 22, 377-380]. Random contrast jitter would therefore be expected to increase the slopes of psychometric functions, and thus ...

journal_title：Vision research

authors： Johnston A,Benton CP,Morgan MJ

更新日期：1999-11-01 00:00:00

abstract：:We compared the thresholds and response properties of extracellularly recorded retinal ganglion cells (RGCs) in wild-type and rd1 mouse retinas to electrical stimulation of the retinal neural network. Retinas were stimulated in vitro with biphasic current pulses (1 ms/phase) applied with a 400-microm diameter, subreti...

journal_title：Vision research

authors： Jensen RJ,Rizzo JF 3rd

更新日期：2008-06-01 00:00:00

abstract：PURPOSE:Evidence exists for an additional inhibitory accommodative control system mediated by the sympathetic branch of the autonomic nervous system (ANS). This work aims to show the relative prevalence of sympathetic inhibition in young emmetropic and myopic adults, and to evaluate the effect of sympathetic facility o...

journal_title：Vision research

authors： Mallen EA,Gilmartin B,Wolffsohn JS

更新日期：2005-06-01 00:00:00

abstract：:The optimal conditions for recording focal pupillary light responses with a multifocal stimulation technique were determined, and the technique was applied to normal subjects and patients with visual field defects. Thirty-seven hexagonal stimuli were presented on a TV monitor with a visual field of 40 degrees diameter...

journal_title：Vision research

authors： Tan L,Kondo M,Sato M,Kondo N,Miyake Y

更新日期：2001-04-01 00:00:00

abstract：:The functional role of three putative neurotransmitter systems in the visual cortex is compared; the GABAergic inhibitory interneurons, the interneurones containing somatostatin and the cholinergic input originating from the nucleus basalis of Meynert (nbM). Evidence is presented to support the role of GABAergic proce...

journal_title：Vision research

authors： Sillito AM,Salt TE,Kemp JA

更新日期：1985-01-01 00:00:00

abstract：:Having long considered that extraretinal information plays little or no role in spatial vision, the study of structure from motion (SfM) has confounded a moving observer perceiving a stationary object with a non-moving observer perceiving a rigid object undergoing equal and opposite motion. However, recently it has be...

journal_title：Vision research

authors： Wexler M,Lamouret I,Droulez J

更新日期：2001-10-01 00:00:00

abstract：:We investigated the manner in which the outputs of the three postreceptoral mechanisms (red-green, blue-yellow and luminance) combine to determine contrast threshold. We used a subthreshold summation paradigm to test whether the combination of the postreceptoral mechanism outputs could be described by a probability su...

journal_title：Vision research

authors： Mullen KT,Sankeralli MJ

更新日期：1999-02-01 00:00:00

abstract：:Four experiments are reported in which saccadic eye movements are examined when the eye moves to targets in peripheral vision which consist of two discrete stimuli. It is found that under a variety of conditions, the saccade amplitude is such that the saccade lands at an intermediate position between the stimuli. This...

journal_title：Vision research

authors： Findlay JM

更新日期：1982-01-01 00:00:00

abstract：:A Westheimer -like function has been obtained for simple reaction time (RT) to target luminance increments superimposed upon homogeneous background fields. RT to a constant-luminance target progressively increases as the outer diameter of a constant-luminance background is increased up to approximately 6'-8'. Further ...

journal_title：Vision research

authors： Wilson A

更新日期：1984-01-01 00:00:00

abstract：:The characteristics of the neural generator producing an evoked potential in response to the brief presentation of a vernier offset was investigated in three experiments. In the first study, averaged evoked potentials (EPs) recorded in response to a single vernier offset stimulus consisting of a horizontal line which ...

journal_title：Vision research

authors： Zak R,Berkley MA

更新日期：1986-01-01 00:00:00

abstract：:Physiological studies of non-human primates have suggested that the direction of gaze can modulate the gain of neuronal responses to visual stimuli in many cortical areas including V1. The neural gaze modulation is suggested to subserve the conversion from gaze-independent (eye-centered) to dependent (e.g., head-cente...

journal_title：Vision research

authors： Nishida S,Motoyoshi I,Andersen RA,Shimojo S

更新日期：2003-03-01 00:00:00

abstract：:A modified version of the 'path finder' display consisting of many small oriented Gabor patches was used to study the joint contributions of spatial and temporal structures to shape perception. A two-interval forced-choice procedure measured detectability of curved 'paths' defined by orientation ('good continuation') ...

journal_title：Vision research

authors： Lee SH,Blake R

更新日期：2001-07-01 00:00:00

abstract：:We examine whether the rules of cyclopean visual direction, as expressed by Hering and others, correctly predict the percept of visual direction for structured visual stimuli. Theoretical inspection of the rules of cyclopean visual direction shows a paradox for the binocular visual directions of stimuli in which objec...

journal_title：Vision research

authors： Erkelens CJ,van de Grind WA

更新日期：1994-11-01 00:00:00

abstract：:Cortical visual evoked potentials (VEPs) in response to gratings temporally modulated in counterphase were recorded in normal and dark-reared pigmented rats. Temporal modulation was either sinusoidal (0.25-15 Hz, steady state condition) or abrupt (0.5 Hz, transient condition). In normals, the amplitude spectrum of con...

journal_title：Vision research

authors： Pizzorusso T,Fagiolini M,Porciatti V,Maffei L

更新日期：1997-02-01 00:00:00

abstract：:We compare improvement through training in vernier acuity under different feedback conditions in order to clarify the role of feedback during learning of a perceptual task and to test different (neural network) models of perceptual learning. Improvement of performance is measured in 49 observers under feedback, no fee...

journal_title：Vision research

authors： Herzog MH,Fahle M

更新日期：1997-08-01 00:00:00

abstract：:Reaching is an important and early emerging motor skill that allows infants to interact with the physical and social world. However, few studies have considered how reaching experiences shape infants' own motor development and their perception of actions performed by others. In the current study, two groups of infants...

journal_title：Vision research

authors： Libertus K,Needham A

更新日期：2010-12-01 00:00:00

abstract：:Age-related maculopathy (ARM) remains a poorly understood degeneration. To discover new pathways using contemporary genomics, proteomics, and immunohistochemistry, validate emerging animal models, and validate new imaging modalities, human tissues obtained from donor eyes will be essential to ARM research for the fore...

journal_title：Vision research

authors： Curcio CA

更新日期：2005-12-01 00:00:00

abstract：:Response properties of neurons in V3A were studied at a retinal eccentricity of 2-4 deg. The distributions of spatial frequency bandwidths and orientation bandwidths were similar to those of neurons in V1. Peaks of spatial frequency tuning curves ranged from 0.35 to 8.0 c/deg with a mean of 1.75 c/deg. Most V3A cells ...

journal_title：Vision research

authors： Gaska JP,Jacobson LD,Pollen DA

更新日期：1988-01-01 00:00:00

abstract：:The purpose of the present study was to find out what differences between foveal and peripheral pattern recognition remain unexplained by the inhomogeneities of retinal sampling and the optics of the eye. We measured contrast thresholds for pattern recognition at different eccentricities. The effects of retinal sampli...

journal_title：Vision research

authors： Näsänen R,O'Leary C

更新日期：1998-12-01 00:00:00

abstract：:A widespread view is that most texture segregation can be accounted for by differences in the spatial frequency content of texture regions. Evidence from both psychophysical and physiological studies indicate, however, that beyond these early filtering stages, there are stages of 3-D boundary segmentation and surface ...

journal_title：Vision research

authors： Grossberg S,Pessoa L

更新日期：1998-09-01 00:00:00

abstract：:Current theories of second-order motion perception postulate that such motion is detected by either a high-level mechanism which computes the temporal correspondences between "features" extracted from the image, or low-level motion mechanisms which operate on a nonlinear, neural transformation of the luminance profile...

journal_title：Vision research

authors： Ledgeway T,Smith AT

更新日期：1994-10-01 00:00:00

abstract：:Using a variety of measures it has been shown that processing time increases with increasing spatial frequency. Long and Sakitt (1981) [Vision Res. 21, 1387-1393] investigated duration of visible persistence as a function of both spatial frequency and number of cycles present. They concluded that number of cycles and ...

journal_title：Vision research

authors： Lovegrove WJ,Meyer GE

更新日期：1984-01-01 00:00:00