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The time course of binocular rivalry reveals a fundamental role of noise
 

Summary: The time course of binocular rivalry reveals
a fundamental role of noise
Functional Neurobiology and Helmholtz Institute,
Utrecht University, Utrecht, The NetherlandsJan W. Brascamp
Physics of Man and Helmholtz Institute,
Utrecht University, Utrecht, The NetherlandsRaymond van Ee
Functional Neurobiology and Helmholtz Institute,
Utrecht University, Utrecht, The NetherlandsAndre´ J. Noest
Functional Neurobiology and Helmholtz Institute,
Utrecht University, Utrecht, The NetherlandsRichard H. A. H. Jacobs
Functional Neurobiology and Helmholtz Institute,
Utrecht University, Utrecht, The NetherlandsAlbert V. van den Berg
When our two eyes view incongruent images, we experience binocular rivalry: An ongoing cycle of dominance periods of
either image and transition periods when both are visible. Two key forces underlying this process are adaptation of and
inhibition between the images' neural representations. Models based on these factors meet the constraints posed by data on
dominance periods, but these are not very stringent. We extensively studied contrast dependence of dominance and transition
durations and that of the occurrence of return transitions: Occasions when an eye loses and regains dominance without in-
tervening dominance of the other eye. We found that dominance durations and the incidence of return transitions depend
similarly on contrast; transition durations show a different dependence. Regarding dominance durations, we show that the
widely accepted rule known as Levelt's second proposition is only valid in a limited contrast range; outside this range, the

  

Source: Andrzejak, Ralph Gregor - Departament de Tecnologia, Universitat Pompeu Fabra
van Ee, Raymond - Faculty of Physics and Astronomy, Universiteit Utrecht

 

Collections: Biology and Medicine; Computer Technologies and Information Sciences; Physics