Biomaterial Database

Specificity and selectivity of chromatic visual evoked potentials. 1996

J J Kulikowski, and A G Robson, and D J McKeefry

Visual Sciences Laboratory, U.M.I.S.T., UK.

A paper by Rabin et al. (1994) Vision Research, 34, 2657-2671, claimed that spatially extensive grating stimuli could be used to generate chromatic-specific visual evoked potentials from subjects assumed to have standard spectral sensitivity and tritanopic confusion lines. Here we demonstrate that such spatially extensive stimuli may generate responses which are contaminated by luminance-contrast intrusions. Such intrusions are mainly due to chromatic aberrations and are compounded by the abovementioned assumptions. Claims regarding the chromatic selectivity of VEPs must, therefore, be substantiated by establishing correlations with the known properties of the chromatic system.

UI	MeSH Term	Description	Entries
D010364	Pattern Recognition, Visual	Mental process to visually perceive a critical number of facts (the pattern), such as characters, shapes, displays, or designs.	Recognition, Visual Pattern,Visual Pattern Recognition
D011601	Psychophysics	The science dealing with the correlation of the physical characteristics of a stimulus, e.g., frequency or intensity, with the response to the stimulus, in order to assess the psychologic factors involved in the relationship.	Psychophysic
D003118	Color Perception	Mental processing of chromatic signals (COLOR VISION) from the eye by the VISUAL CORTEX where they are converted into symbolic representations. Color perception involves numerous neurons, and is influenced not only by the distribution of wavelengths from the viewed object, but also by its background color and brightness contrast at its boundary.	Color Perceptions,Perception, Color,Perceptions, Color
D005074	Evoked Potentials, Visual	The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways.	Visual Evoked Response,Evoked Potential, Visual,Evoked Response, Visual,Evoked Responses, Visual,Potential, Visual Evoked,Potentials, Visual Evoked,Response, Visual Evoked,Responses, Visual Evoked,Visual Evoked Potential,Visual Evoked Potentials,Visual Evoked Responses
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D015350	Contrast Sensitivity	The ability to detect sharp boundaries (stimuli) and to detect slight changes in luminance at regions without distinct contours. Psychophysical measurements of this visual function are used to evaluate VISUAL ACUITY and to detect eye disease.	Visual Contrast Sensitivity,Sensitivity, Contrast,Sensitivity, Visual Contrast
D017949	Retinal Cone Photoreceptor Cells	Photosensitive afferent neurons located primarily within the FOVEA CENTRALIS of the MACULA LUTEA. There are three major types of cone cells (red, blue, and green) whose photopigments have different spectral sensitivity curves. Retinal cone cells operate in daylight vision (at photopic intensities) providing color recognition and central visual acuity.	Cone Photoreceptors,Cones (Retina),Cone Photoreceptor Cells,Photoreceptors, Cone,Retinal Cone,Retinal Cone Cells,Retinal Cone Photoreceptors,Cell, Cone Photoreceptor,Cell, Retinal Cone,Cells, Cone Photoreceptor,Cells, Retinal Cone,Cone (Retina),Cone Cell, Retinal,Cone Cells, Retinal,Cone Photoreceptor,Cone Photoreceptor Cell,Cone Photoreceptor, Retinal,Cone Photoreceptors, Retinal,Cone, Retinal,Cones, Retinal,Photoreceptor Cell, Cone,Photoreceptor Cells, Cone,Photoreceptor, Cone,Photoreceptor, Retinal Cone,Photoreceptors, Retinal Cone,Retinal Cone Cell,Retinal Cone Photoreceptor,Retinal Cones