Motion-induced blindness and Troxler fading

Common and different mechanisms

Yoram S. Bonneh, Tobias H. Donner, Alexander Cooperman, David J. Heeger, Dov Sagi

Research output: Contribution to journalArticle

Abstract

Extended stabilization of gaze leads to disappearance of dim visual targets presented peripherally. This phenomenon, known as Troxler fading, is thought to result from neuronal adaptation. Intense targets also disappear intermittently when surrounded by a moving pattern (the "mask"), a phenomenon known as motion-induced blindness (MIB). The similar phenomenology and dynamics of these disappearances may suggest that also MIB is, likewise, solely due to adaptation, which may be amplified by the presence of the mask. Here we directly compared the dependence of both phenomena on target contrast. Observers reported the disappearance and reappearance of a target of varying intensity (contrast levels: 8%-80%). MIB was induced by adding a mask that moved at one of various different speeds. The results revealed a lawful effect of contrast in both MIB and Troxler fading, but with opposite trends. Increasing target contrast increased (doubled) the rate of disappearance events for MIB, but decreased the disappearance rate to half in Troxler fading. The target mean invisible period decreased equally strongly with target contrast in MIB and in Troxler fading. The results suggest that both MIB and Troxler are equally affected by contrast adaptation, but that the rate of MIB is governed by an additional mechanism, possibly involving antagonistic processes between neuronal populations processing target and mask. Our results link MIB to other bi-stable visual phenomena that involve neuronal competition (such as binocular rivalry), which exhibit an analogous dependency on the strength of the competing stimulus components.

Original languageEnglish (US)
Article numbere92894
JournalPLoS One
Volume9
Issue number3
DOIs
StatePublished - Mar 21 2014

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blindness
Blindness
Masks
Binoculars
Stabilization
Processing
Health Services Needs and Demand

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Motion-induced blindness and Troxler fading : Common and different mechanisms. / Bonneh, Yoram S.; Donner, Tobias H.; Cooperman, Alexander; Heeger, David J.; Sagi, Dov.

In: PLoS One, Vol. 9, No. 3, e92894, 21.03.2014.

Research output: Contribution to journalArticle

Bonneh, Yoram S. ; Donner, Tobias H. ; Cooperman, Alexander ; Heeger, David J. ; Sagi, Dov. / Motion-induced blindness and Troxler fading : Common and different mechanisms. In: PLoS One. 2014 ; Vol. 9, No. 3.
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