Abstract
Visual sensitivity to a flickering, sinusoidal grating was assessed in multiple sclerosis patients and control observers. It was found that losses in spatial contrast sensitivity exhibited by patients were independent of the rate at which the grating was flickered. However, more often than for the controls, the detection criterion for the patients was based upon seeing a pattern rather than. flicker. These findings are interpreted in light of the recent controversy concerning whether there is more than one set of neural mechanisms responsible for processing information about pattern and flicker. It is concluded that the data are consistent with the view that the human visual system contains partially independent channels.
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References
Bodis-Wollner, I. (1972). Visual acuity and contrast sensitivity in patients with cerebral lesions.Science,175, 769–771.
Bodis-Wollner, I., &Hendley, C. D. (1979). On the separability of two mechanisms involved in the detection of grating patterns in humans.Journal of Physiology (London),291, 251–263.
Bodis-Wollner, I., Hendley, C. D., Mylin, L. H., &Thornton, J. (1979). Visual evoked potentials and the visuogram in multiple sclerosis.Annals of Neurology,5, 40–47.
Brussell, E. M., White, C. W., Bross, M., Mustillo, P., &Borenstein, M. (1981/1982). Multi-flash campimetry in multiple sclerosis.Current Eye Research,1, 671–677.
Burbeck, C. A. (1981). Criterion-free pattern and flicker thresholds.Journal of the Optical Society of America,71, 1343–1350.
Campbell, F. W., &Green, D. G. (1965). Optical and retinal factors affecting visual resolution.Journal of Physiology (London),181, 576–593.
Daley, M. L., Swank, R. L., &Ellison, C. M. (1979). Flicker fusion thresholds in multiple sclerosis: A functional measure of neurological damage.Archives of Neurology,36, 292–295.
Derrington, A. B., &Henning, C. B. (1981). Pattern discrimination with flickering stimuli.Vision Research,21, 597–602.
Enoch, J. M., &Williams, R. A. (1983). Development of clinical tests of vision: Initial data on two hyperacuity paradigms.Perception & Psychophysics,33, 314–322.
Essock, E. A., &Lehmkuhle, S. (1982). The oblique effects of pattern and flicker sensitivity: Implications for mixed physiological input.Perception,11, 441–455.
Galvin, R. J., Regan, D., &Heron, J. R. (1976). Impaired temporal resolution of vision after acute retrobulbar neuritis.Brain,99, 255–268.
Keesey, U. T. (1972). Flicker and pattern detection: A comparison of thresholds.Journal of the Optical Society of America,62, 446–448.
Kelly, D. H. (1961). Visual responses to time dependent stimuli. I. Amplitude sensitivity measurements.Journal of the Optical Society of America,51, 422–429.
Kelly, D. H. (1982). Fourier components of moving gratings.Behavior Research Methods & Instrumentation,14, 435–437.
King-Smith, P. E., &Kulikowski, J. J. (1975). Pattern and flicker detection analysed by subthreshold summation.Journal of Physiology (London),249, 519–548.
Kulikowski, J. J., &Tolhurst, D. J. (1973). Psychophysical evidence for sustained and transient detectors in human vision.Journal of Physiology (London),232, 149–162.
Murray, I., Maccana, F., &Kulikowski, J. J. (1983). Contribution of two movement detecting mechanisms to central and peripheral vision.Vision Research,23, 151–159.
Regan, D., Raymond, J., Ginsburg, A. P., &Murray, T. J. (1981). Contrast sensitivity, visual acuity and the discrimination of Snellen letters in multiple sclerosis.Brain,104, 333–350.
Regan, D., Silver, R., &Murray, T. J. (1977). Visual acuity and contrast sensitivity in multiple sclerosis-hidden visual loss.Brain,100, 563–579.
Tolhurst, D. J. (1973). Separate channels for the analysis of the shape and the movement of a moving stimulus.Journal of Physiology (London),231, 385–402.
Zimmern, R. L., Campbell, F. W., &Wilkinson, I. M. S. (1979). Subtle disturbances of vision after optic neuritis elicited by studying contrast sensitivity.Journal of Neurology, Neurosurgery, and Psychiatry,42, 407–412.
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This report is based on a paper delivered at the annual meeting of the Association for Research in Vision and Ophthalmology, Sarasota, Florida, May 1982. The study was supported by grants from the Natural Sciences and Engineering Research Council of Canada (Nos. A9937 to E.M.B. and A7482 to C.W.W.).
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Brussell, E.M., White, C.W., Mustillo, P. et al. Inferences about mechanisms that mediate pattern and flicker sensitivity. Perception & Psychophysics 35, 301–304 (1984). https://doi.org/10.3758/BF03206332
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DOI: https://doi.org/10.3758/BF03206332