Cortical modulation of visual contrast

Yoichi Sugita*, Kazuhiko Mimura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The mechanisms that produce simultaneous contrast have been thought to depend on retinal gain control and the retina is supposed to send signals to the brain only in terms of local-border contrast (Shapley, 1986). However, it was found that, when an object on a uniform background and border-concealing stimuli are presented to different eyes, the brightness of the object is greatly influenced if the border-concealing stimuli are perceptually superimposed on the border of the object. The change in the object's brightness in this condition is almost identical to that observed when both the object and the border-concealing stimuli are presented to the same eye, suggesting that the brain can compute brightness by using luminosity information when contrast information is disrupted.

Original languageEnglish
Pages (from-to)271-273
Number of pages3
JournalPsychological Research
Issue number4
Publication statusPublished - 1991 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Psychology(all)


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