Neural Correlates underlying Size Constancy in Virtual Three-Dimensional Space

Abstract The perceived size of an object remains relatively constant although its retinal size keeps decreasing as the object moves away along the depth dimension of the 3D space, i.e. size constancy. Neural mechanisms generating size constancy in virtual 3D space, however, remain poorly understood....

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Autores principales:	Jing Xia, Pengfei Wang, Qi Chen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b9c0a482349743d39c5c5a8fca2b40c7
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spelling	oai:doaj.org-article:b9c0a482349743d39c5c5a8fca2b40c72021-12-02T16:06:26ZNeural Correlates underlying Size Constancy in Virtual Three-Dimensional Space10.1038/s41598-017-03652-62045-2322https://doaj.org/article/b9c0a482349743d39c5c5a8fca2b40c72017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03652-6https://doaj.org/toc/2045-2322Abstract The perceived size of an object remains relatively constant although its retinal size keeps decreasing as the object moves away along the depth dimension of the 3D space, i.e. size constancy. Neural mechanisms generating size constancy in virtual 3D space, however, remain poorly understood. By constructing a virtual 3D world in the MR scanner, we positioned the same 3D objects either near or far from the observers so that the near and far objects were perceived as having the same physical size despite their differences in retinal size. To control for the effect of differential retinal size, an additional 2D condition was introduced: a large and a small object, with matched retinal images as the near and far objects in the 3D condition, respectively, were presented on a 2D screen. Differences in retinal size activated overlapped areas in bilateral inferior occipital gyrus (IOG) in both experiments. The overlapped areas in IOG, however, showed different patterns of functional connectivity with different neural networks, depending on the perceived size of objects. In particular, IOG showed enhanced connectivity with bilateral superior parietal cortex in the 2D condition, but with inferior temporal and prefrontal cortex in the virtual 3D condition, i.e., size constancy.Jing XiaPengfei WangQi ChenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jing Xia Pengfei Wang Qi Chen Neural Correlates underlying Size Constancy in Virtual Three-Dimensional Space
description	Abstract The perceived size of an object remains relatively constant although its retinal size keeps decreasing as the object moves away along the depth dimension of the 3D space, i.e. size constancy. Neural mechanisms generating size constancy in virtual 3D space, however, remain poorly understood. By constructing a virtual 3D world in the MR scanner, we positioned the same 3D objects either near or far from the observers so that the near and far objects were perceived as having the same physical size despite their differences in retinal size. To control for the effect of differential retinal size, an additional 2D condition was introduced: a large and a small object, with matched retinal images as the near and far objects in the 3D condition, respectively, were presented on a 2D screen. Differences in retinal size activated overlapped areas in bilateral inferior occipital gyrus (IOG) in both experiments. The overlapped areas in IOG, however, showed different patterns of functional connectivity with different neural networks, depending on the perceived size of objects. In particular, IOG showed enhanced connectivity with bilateral superior parietal cortex in the 2D condition, but with inferior temporal and prefrontal cortex in the virtual 3D condition, i.e., size constancy.
format	article
author	Jing Xia Pengfei Wang Qi Chen
author_facet	Jing Xia Pengfei Wang Qi Chen
author_sort	Jing Xia
title	Neural Correlates underlying Size Constancy in Virtual Three-Dimensional Space
title_short	Neural Correlates underlying Size Constancy in Virtual Three-Dimensional Space
title_full	Neural Correlates underlying Size Constancy in Virtual Three-Dimensional Space
title_fullStr	Neural Correlates underlying Size Constancy in Virtual Three-Dimensional Space
title_full_unstemmed	Neural Correlates underlying Size Constancy in Virtual Three-Dimensional Space
title_sort	neural correlates underlying size constancy in virtual three-dimensional space
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b9c0a482349743d39c5c5a8fca2b40c7
work_keys_str_mv	AT jingxia neuralcorrelatesunderlyingsizeconstancyinvirtualthreedimensionalspace AT pengfeiwang neuralcorrelatesunderlyingsizeconstancyinvirtualthreedimensionalspace AT qichen neuralcorrelatesunderlyingsizeconstancyinvirtualthreedimensionalspace
_version_	1718384985679855616

Neural Correlates underlying Size Constancy in Virtual Three-Dimensional Space

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