Three-dimensional motion aftereffects reveal distinct direction-selective mechanisms for binocular processing of motion through depth

Thaddeus B. Czuba, Bas Rokers, Kyle Guillet, Alexander C. Huk, Lawrence K. Cormack

Research output: Contribution to journalArticle

Abstract

Motion aftereffects are historically considered evidence for neuronal populations tuned to specific directions of motion. Despite a wealth of motion aftereffect studies investigating 2D (frontoparallel) motion mechanisms, there is a remarkable dearth of psychophysical evidence for neuronal populations selective for the direction of motion through depth (i.e., tuned to 3D motion). We compared the effects of prolonged viewing of unidirectional motion under dichoptic and monocular conditions and found large 3D motion aftereffects that could not be explained by simple inheritance of 2D monocular aftereffects. These results (1) demonstrate the existence of neurons tuned to 3D motion as distinct from monocular 2D mechanisms, (2) show that distinct 3D direction selectivity arises from both interocular velocity differences and changing disparities over time, and (3) provide a straightforward psychophysical tool for further probing 3D motion mechanisms.

Original languageEnglish (US)
Pages (from-to)1-18
Number of pages18
JournalJournal of vision
Volume11
Issue number10
DOIs
StatePublished - Oct 21 2011

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Keywords

  • 3D motion
  • Binocular vision
  • Changing disparity
  • Interocular velocity difference
  • Motion aftereffect
  • Stereomotion

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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