On and off pathway contributions to apparent motion perception

Sima Shechter*, Shaul Hochstein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We studied the separability and/or interaction of the On and Off pathways in their role as inputs to visual motion perception. Using the long-range motion perception system, we asked if the motion system can use brightness polarity information, by testing whether correspondence is preferred between elements for which brightness polarity is preserved. We found such a preference, suggesting that brightness polarity information is indeed available to the motion system. However, under certain conditions motion is perceived even though the brightness polarity of apparent motion stimulus elements is reversed, indicating that the apparent motion system does integrate information from these two pathways. The source of the preference for maintaining polarity seems not to be the different brightnesses of the dark and bright stimulus elements, but the very fact that information must be integrated from different pathways. We relate the characteristics of the dependence of the motion perception on element contrast and contrast sign to those of previously reported visual evoked potential responses to brightness increments and decrements.

Original languageEnglish
Pages (from-to)1189-1204
Number of pages16
JournalVision Research
Volume30
Issue number8
DOIs
StatePublished - 1990

Keywords

  • Apparent motion
  • Brightness
  • Contrast
  • Correspondence process
  • Motion perception
  • Off
  • On
  • Visual psychophysics

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