A Joint Lateral Motion—Stereo Constraint

Yiya Chen, Zhimo Yao, Zhifen He, Ziyun Cheng, Pi Chun Huang, Seung Hyun Min, Fan Lu, Robert F. Hess, Jiawei Zhou

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

PURPOSE. We developed a stereo task that is based on a motion direction discrimination to examine the role that depth can play in disambiguating motion direction. METHODS. In this study, we quantified normal adults’ static and dynamic (i.e., laterally moving) stereoscopic performance using a psychophysical task, where we dichoptically presented randomly arranged, limited lifetime Gabor elements at two depth planes (one plane was at the fixation plane and the other at an uncrossed disparity relative to the fixation plane). Each plane contained half of the elements. For the dynamic condition, all elements were vertically oriented and moved to the left in one plane and to the right in another plane; for the static condition, the elements were horizontally oriented in one plane and vertically oriented in another plane. RESULTS. For the range of motion speed that we measured (from 0.17°/s to 5.33°/s), we observed clear speed tuning of the stereo sensitivity (P = 3.0 × 10−5). The shape of this tuning did not significantly change with different spatial frequencies. We also found a significant difference in stereo sensitivity between stereopsis with static and laterally moving stimuli (speed = 0.67°/s; P = 0.004). Such difference was not evident when we matched the task between the static and moving stimuli. CONCLUSIONS. We report that lateral motion modulates human global depth perception. This motion/stereo constraint is related to motion velocity not stimulus temporal frequency. We speculate that the processing of motion-based stereopsis of the kind reported here occurs in dorsal extrastriate cortex.

原文English
文章編號32
期刊Investigative Ophthalmology and Visual Science
63
發行號1
DOIs
出版狀態Published - 2022 1月

All Science Journal Classification (ASJC) codes

  • 眼科
  • 感覺系統
  • 細胞與分子神經科學

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