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*** effects of monocular deprivation on the pulfrich phenomenon

Annals of Eye Science 2019年第1期 188-188页

作者： Sasha Novozhilova Alexandre Reynaud Robert F.Hess Department of Ophthalmology and Visual Science McGill UniversityMontrealQCCanada

Background:Short term monocular deprivation allows for the modulation of ocular dominance,such that the previously deprived eye contribution will increase,while that of non-deprived eye will *** study examines the effects of short monocular occlusion on the pulfrich phenomenon,an illusory perception of a horizontally moving object moving in an elliptical orbit in *** addition,we will explore whether the modulation of the pulfrich effect is produced in the magnocellular pathway or the parvocellular pathway,by comparing two protocols,each designed to activate one pathway at a ***:The stimulus used throughout the experiment is made up of elements defining a cylinder rotating in depth,allowing to measure interocular *** task consists of reporting the direction of rotation of the stimulus *** are two different stimuli:the P stimulus is composed of small elements oscillating slowly,which stimulates the parvocellular pathway,and the M stimulus which is composed of large elements oscillating rapidly which stimulates the magnocellular *** experimental session consists of pre-patch testing,one hour of patching,and a post-patch *** participant performs four sessions,both stimuli for each ***:The point of subjective equivalence(PSE)is extracted from psychometric functions obtained during pre-testing and *** deprivation of the left eye the PSE shifts negatively,whereas deprivation of the right eye shifts the PSE positively on the psychometric *** indicated that monocular deprivation slows the perceptual processes of the previously patched *** amplitude of this effect is larger for the M protocol than it is for the P ***:Contrary to expectations,results showed that effects of monocular deprivation are not exclusively mediated by contrast gain mechanisms,as suggested by Zhou and colleagues(2014).The amplitude of the differences observed for the M protocole suggest t

关键词： Monocular deprivation plasticity pulfrich phenomenon binocular vision

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