Cross-fixation transfer of motion aftereffects with expansion motion

Xin Meng, Pietro Mazzoni, Ning Qian

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

It has been shown that motion aftereffect (MAE) not only is present at the adapted location but also partially transfers to nearby non-adapted locations. However, it is not clear whether MAE transfers across the fixation point. Since cells in area MSTd have receptive fields that cover both sides of the fixation point and since many MSTd cells, but not cells in earlier visual areas, prefer complex motion patterns such as expansion, we tested cross-fixation transfer of MAE induced by expanding random-dots stimuli. We also used rightward translational motion for comparison. Subjects adapted to motion patterns on a fixed side of the fixation point. Dynamic MAE was then measured with a nulling procedure at both the adapted site and the mirror site across the fixation point. Subjects' eye fixation during stimulus presentation was monitored with an infrared eye tracker. At the adapted site, both the expansion and the translation patterns generated strong MAEs, as expected. However, only the expansion pattern, but not translation pattern, generated significant MAE at the mirror site. This remained true even after we adjusted stimulus parameters to equate the strengths of the expansion MAE and translation MAE at the adapted site. We conclude that there is cross-fixation transfer of MAE for expansion motion but not for translational motion.

Original languageEnglish
Pages (from-to)3681-3689
Number of pages9
JournalVision Research
Volume46
Issue number21
DOIs
StatePublished - Oct 1 2006
Externally publishedYes

Keywords

  • Adaptation
  • Complex motion
  • MAE
  • MSTd
  • Translational motion

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