Spatial-frequency adaptation: Evidence for a multiple-channel model of short-wavelength-sensitive-cone spatial vision

The frequency selective effects of spatial adaptation were measured with vertically-oriented, cosine stimuli upon an intense long-wavelength (yellow) field, which isolated the short-wavelength-sensitive (S) cones. Consistent with isolated-S-cone spatial threshold and masking results, the adaptation measurements demonstrate S-cones input to multiple, orientation selective, spatial frequency mechanisms. Moreover, the adaptation measurements show the minimum number of S-cone mechanisms is three. The frequency tuning of each mechanism was derived from the S-cone threshold and masking results. Two of the tuning curves are bandpass with peak sensitivities in a vicinity of 0.7 and 1.4 c/deg, respectively. These two closely resemble tuning curves derived from results with luminance-modulated stimuli. Confined to the range of frequencies examined (0.25-2.83 c/deg), the third tuning curve is lowpass with a high-frequency cutoff of roughly 2.0 c/deg. However, subsequent measurements of orientation selectivity demonstrate the third mechanism to have bandpass frequency tuning as well.

[1]  Randolph Blake,et al.  Limits of binocular fusion in the short wave sensitive (“blue”) cones , 1988, Vision Research.

[2]  R. Smith,et al.  An action spectrum for spatial-frequency adaptation , 1982, Vision Research.

[3]  R. M. Boynton,et al.  Temporal modulation sensitivity of the blue mechanism: Measurements made without chromatic adaptation , 1980, Vision Research.

[4]  C Blakemore,et al.  On the existence of neurones in the human visual system selectively sensitive to the orientation and size of retinal images , 1969, The Journal of physiology.

[5]  A. Milam,et al.  Distribution and morphology of human cone photoreceptors stained with anti‐blue opsin , 1991, The Journal of comparative neurology.

[6]  Quick Rf.  A vector-magnitude model of contrast detection. , 1974 .

[7]  J. Cowan,et al.  Localized effects of spatial frequency adaptation. , 1982, Journal of the Optical Society of America.

[8]  Jeremy M Wolfe,et al.  Is Accommodation Colorblind? Focusing Chromatic Contours , 1981, Perception.

[9]  S. R. Lehky,et al.  Temporal properties of visual channels measured by masking. , 1985, Journal of the Optical Society of America. A, Optics and image science.

[10]  D. H. Kelly.  Spatio-temporal frequency characteristics of color-vision mechanisms* , 1974 .

[11]  H. Wilson,et al.  Spatial frequency mechanisms with short-wavelength-sensitive cone inputs , 1992, Vision Research.

[12]  W. Nagel.  Handbuch der Physiologie des Menschen. , 1905 .

[13]  D. Macleod,et al.  Blue-sensitive cones do not contribute to luminance. , 1980, Journal of the Optical Society of America.

[14]  J. Bergen,et al.  A four mechanism model for threshold spatial vision , 1979, Vision Research.

[15]  C F Stromeyer,et al.  Spatial adaptation of short-wavelength pathways in humans. , 1980, Science.

[16]  W. Swanson.  Short wavelength sensitive cone acuity: individual differences and clinical use. , 1989, Applied optics.

[17]  R. Hess,et al.  Spatial and temporal limits of vision in the achromat. , 1986, The Journal of physiology.

[18]  A. Saul,et al.  Adaptation in single units in visual cortex: The tuning of aftereffects in the temporal domain , 1989, Visual Neuroscience.

[19]  John D. Mollon,et al.  A TAXONOMY OF TRITANOPIAS , 1982 .

[20]  P K Ahnelt,et al.  Identification of a subtype of cone photoreceptor, likely to be blue sensitive, in the human retina , 1987, The Journal of comparative neurology.

[21]  G. Legge.  Sustained and transient mechanisms in human vision: Temporal and spatial properties , 1978, Vision Research.

[22]  P. Lennie,et al.  Pattern-selective adaptation in visual cortical neurones , 1979, Nature.

[23]  H R Wilson,et al.  A synaptic model for spatial frequency adaptation. , 1975, Journal of theoretical biology.

[24]  D. G. Green.  The contrast sensitivity of the colour mechanisms of the human eye , 1968, The Journal of physiology.

[25]  C. Stromeyer,et al.  Adaptive processes controlling sensitivity of short-wave cone pathways to different spatial frequencies , 1984, Vision Research.

[26]  H. Wilson,et al.  Spatial frequency tuning of orientation selective units estimated by oblique masking , 1983, Vision Research.

[27]  Gunther Wyszecki,et al.  Color Science: Concepts and Methods, Quantitative Data and Formulae, 2nd Edition , 2000 .

[28]  J M Enoch,et al.  Contrast sensitivity, Westheimer function and Stiles-Crawford effect in a blue cone monochromat. , 1973, Vision research.

[29]  S. Klein,et al.  Is spatial adaptation caused by prolonged inhibition? , 1977, Vision Research.

[30]  H. Wilson,et al.  Spatial frequency adaptation and contrast gain control , 1993, Vision Research.

[31]  H. Wilson,et al.  Spatial-frequency adaptation affects spatial-probability summation. , 1983, Journal of the Optical Society of America.

[32]  D. Williams,et al.  Consequences of spatial sampling by a human photoreceptor mosaic. , 1983, Science.