Results 191 to 200 of about 3,572 (238)
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Flicker Fusion Thresholds in Multiple Sclerosis
Archives of Neurology And Psychiatry, 1957Problem The visual flicker-fusion threshold (FFT)* has been reported to be lower in patients with brain damage than in persons free from such pathology.1-6Most of these studies have been concerned with the effects of damage to the gray matter of the brain, especially to the frontal and occipital lobes, and the relationship of this damage to FFT.
P N, MILLER, O A, PARSONS
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Flicker fusion frequency in sauna-bath
Internationale Zeitschrift f�r Angewandte Physiologie Einschliesslich Arbeitsphysiologie, 1955In 20 experiments on 10 young adult male subjects the FFF was determined in connection with an exposure to high ambient temperatures in the Finnish sauna-bath. The FFF initially fell, but rose gradually back to the pre-sauna level during a 15 min. stay in the hot room. Cooling after the exposure did not cause any further changes. The FFF behaved in the
R, KAARIAINEN +2 more
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Flicker Fusion Bibliography, 1953–1968
Perceptual and Motor Skills, 1970A list of 1293 references brings up to date Landis' bibliography on flicker fusion. CODEN abbreviations, periodical titles and subject index are included.
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Flicker Fusion Thresholds and Mental Arousal
Perceptual and Motor Skills, 1982Investigated the finding of Busch and Wachholder that flicker fusion thresholds increase under conditions of mental activity and decrease during inactivity. Flicker fusion thresholds for each eye of 21 undergraduates were measured after 2-min. rests, then after the performance of a mathematical counting exercise, and then after another 2-min. rest. The
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TESTING VISUAL FIELDS BY FLICKER FUSION
Archives of Neurology And Psychiatry, 1951THE CRITICAL rate at which a flickering light of decreasing frequency is first perceived to flicker is the one test of visual function in which the light-adapted eye is more sensitive at the periphery of the retina than at its center. Previous investigators have agreed that flicker fusion fields are sensitive and "typical" in neurological lesions ...
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Flicker between Different Brightness Levels as Determinant of the Flicker Fusion*
Journal of the Optical Society of America, 1960For investigation of flicker produced by phasic variations of the brightness level, an electronic flicker apparatus was developed for continuous variation of brightness, area, light-dark ratio, ambient light ratio, and monocular or binocular exposure.
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The modification of critical flicker fusion frequency by an adapting stimulus of flickering light
Vision Research, 1965Abstract The critical flicker fusion frequency is elevated by adaptation to intermittent light of high frequency and depressed by intermittent light of lower frequency. This relationship is almost linear between adapting frequencies of 24 and 54 c/s.
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Flicker Fusion and Spatial Summation
1981Flicker fusion frequencies in the central and paracentral retina were studied for liminar and supraliminar stimulations with targets of different size. Statistical analysis of the results obtained in a relatively large series of patients allows a good standardization of ‘normal’ values for healthy people.
M. Zingirian +3 more
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Flicker Fusion in Pericoecal Area
1981The pericoecal area is known to be the site of some early defects of the visual field. Flicker fusion frequencies, on turn, have been reported to be often altered when more classical Perimetric examination results are still unchanged. This work is intended to report ‘normal’ values for flicker fusion frequencies in this area based on the examination of
Giovanni Calabria +3 more
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