气候变化领域集成服务门户(CCPortal): Crossed–uncrossed projections from primate retina are adapted to disparities of natural scenes

CCPortal

DOI	10.1073/pnas.2015651118
	Crossed–uncrossed projections from primate retina are adapted to disparities of natural scenes
	Gibaldi A.; Benson N.C.; Banks M.S.
发表日期	2021
ISSN	00278424
卷号	118 期号:7
英文摘要	In mammals with frontal eyes, optic-nerve fibers from nasal retina project to the contralateral hemisphere of the brain, and fibers from temporal retina project ipsilaterally. The division between crossed and uncrossed projections occurs at or near the vertical meridian. If the division was precise, a problem would arise. Small objects near midline, but nearer or farther than current fixation, would produce signals that travel to opposite hemispheres, making the binocular disparity of those objects difficult to compute. However, in species that have been studied, the division is not precise. Rather, there are overlapping crossed and uncrossed projections such that some fibers from nasal retina project ipsilaterally as well as contralaterally and some from temporal retina project contralaterally as well as ipsilaterally. This increases the probability that signals from an object near vertical midline travel to the same hemisphere, thereby aiding disparity estimation. We investigated whether there is a deficit in binocular vision near the vertical meridian in humans and found no evidence for one. We also investigated the effectiveness of the observed decussation pattern, quantified from anatomical data in monkeys and humans. We used measurements of naturally occurring disparities in humans to determine disparity distributions across the visual field. We then used those distributions to calculate the probability of natural disparities transmitting to the same hemisphere, thereby aiding disparity computation. We found that the pattern of overlapping projections is quite effective. Thus, crossed and uncrossed projections from the retinas are well designed for aiding disparity estimation and stereopsis. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Decussation; Natural scenes; Retinocortical projections; Stereopsis
语种	英语
scopus关键词	animal experiment; article; binocular vision; body meridian; Haplorhini; human; nasal retina; nonhuman; probability; stereoscopic vision; travel
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180666
作者单位	Vision Science Program, School of Optometry, University of California, Berkeley, CA 94720, United States; eScience Institute, University of Washington, Seattle, WA 98195, United States
推荐引用方式 GB/T 7714	Gibaldi A.,Benson N.C.,Banks M.S.. Crossed–uncrossed projections from primate retina are adapted to disparities of natural scenes[J],2021,118(7).
APA	Gibaldi A.,Benson N.C.,&Banks M.S..(2021).Crossed–uncrossed projections from primate retina are adapted to disparities of natural scenes.Proceedings of the National Academy of Sciences of the United States of America,118(7).
MLA	Gibaldi A.,et al."Crossed–uncrossed projections from primate retina are adapted to disparities of natural scenes".Proceedings of the National Academy of Sciences of the United States of America 118.7(2021).