Unreferenced spatial localization under monocular and dichoptic viewing conditions

Abstract Knowledge of eye position in the brain is critical for localization of objects in space. To investigate the accuracy and precision of eye position feedback in an unreferenced environment, subjects with normal ocular alignment attempted to localize briefly presented targets during monocular...

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Autores principales:	Apoorva Karsolia, Scott B. Stevenson, Vallabh E. Das
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fb4c2d318c76476d91efe83db7e1a8fd
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spelling	oai:doaj.org-article:fb4c2d318c76476d91efe83db7e1a8fd2021-11-08T10:46:43ZUnreferenced spatial localization under monocular and dichoptic viewing conditions10.1038/s41598-021-00597-92045-2322https://doaj.org/article/fb4c2d318c76476d91efe83db7e1a8fd2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00597-9https://doaj.org/toc/2045-2322Abstract Knowledge of eye position in the brain is critical for localization of objects in space. To investigate the accuracy and precision of eye position feedback in an unreferenced environment, subjects with normal ocular alignment attempted to localize briefly presented targets during monocular and dichoptic viewing. In the task, subjects’ used a computer mouse to position a response disk at the remembered location of the target. Under dichoptic viewing (with red (right eye)–green (left eye) glasses), target and response disks were presented to the same or alternate eyes, leading to four conditions [green target–green response cue (LL), green–red (LR), red–green (RL), and red–red (RR)]. Time interval between target and response disks was varied and localization errors were the difference between the estimated and real positions of the target disk. Overall, the precision of spatial localization (variance across trials) became progressively worse with time. Under dichoptic viewing, localization errors were significantly greater for alternate-eye trials as compared to same-eye trials and were correlated to the average phoria of each subject. Our data suggests that during binocular dissociation, spatial localization may be achieved by combining a reliable versional efference copy signal with a proprioceptive signal that is unreliable perhaps because it is from the wrong eye or is too noisy.Apoorva KarsoliaScott B. StevensonVallabh E. DasNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Apoorva Karsolia Scott B. Stevenson Vallabh E. Das Unreferenced spatial localization under monocular and dichoptic viewing conditions
description	Abstract Knowledge of eye position in the brain is critical for localization of objects in space. To investigate the accuracy and precision of eye position feedback in an unreferenced environment, subjects with normal ocular alignment attempted to localize briefly presented targets during monocular and dichoptic viewing. In the task, subjects’ used a computer mouse to position a response disk at the remembered location of the target. Under dichoptic viewing (with red (right eye)–green (left eye) glasses), target and response disks were presented to the same or alternate eyes, leading to four conditions [green target–green response cue (LL), green–red (LR), red–green (RL), and red–red (RR)]. Time interval between target and response disks was varied and localization errors were the difference between the estimated and real positions of the target disk. Overall, the precision of spatial localization (variance across trials) became progressively worse with time. Under dichoptic viewing, localization errors were significantly greater for alternate-eye trials as compared to same-eye trials and were correlated to the average phoria of each subject. Our data suggests that during binocular dissociation, spatial localization may be achieved by combining a reliable versional efference copy signal with a proprioceptive signal that is unreliable perhaps because it is from the wrong eye or is too noisy.
format	article
author	Apoorva Karsolia Scott B. Stevenson Vallabh E. Das
author_facet	Apoorva Karsolia Scott B. Stevenson Vallabh E. Das
author_sort	Apoorva Karsolia
title	Unreferenced spatial localization under monocular and dichoptic viewing conditions
title_short	Unreferenced spatial localization under monocular and dichoptic viewing conditions
title_full	Unreferenced spatial localization under monocular and dichoptic viewing conditions
title_fullStr	Unreferenced spatial localization under monocular and dichoptic viewing conditions
title_full_unstemmed	Unreferenced spatial localization under monocular and dichoptic viewing conditions
title_sort	unreferenced spatial localization under monocular and dichoptic viewing conditions
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fb4c2d318c76476d91efe83db7e1a8fd
work_keys_str_mv	AT apoorvakarsolia unreferencedspatiallocalizationundermonocularanddichopticviewingconditions AT scottbstevenson unreferencedspatiallocalizationundermonocularanddichopticviewingconditions AT vallabhedas unreferencedspatiallocalizationundermonocularanddichopticviewingconditions
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Unreferenced spatial localization under monocular and dichoptic viewing conditions

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