Adaptive control of movement deceleration during saccades.

As you read this text, your eyes make saccades that guide your fovea from one word to the next. Accuracy of these movements require the brain to monitor and learn from visual errors. A current model suggests that learning is supported by two different adaptive processes, one fast (high error sensiti...

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Autores principales:	Simon P Orozco, Scott T Albert, Reza Shadmehr
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/133c38599b464667a4b5a2d47f7fe055
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spelling	oai:doaj.org-article:133c38599b464667a4b5a2d47f7fe0552021-12-02T19:57:25ZAdaptive control of movement deceleration during saccades.1553-734X1553-735810.1371/journal.pcbi.1009176https://doaj.org/article/133c38599b464667a4b5a2d47f7fe0552021-07-01T00:00:00Zhttps://doi.org/10.1371/journal.pcbi.1009176https://doaj.org/toc/1553-734Xhttps://doaj.org/toc/1553-7358As you read this text, your eyes make saccades that guide your fovea from one word to the next. Accuracy of these movements require the brain to monitor and learn from visual errors. A current model suggests that learning is supported by two different adaptive processes, one fast (high error sensitivity, low retention), and the other slow (low error sensitivity, high retention). Here, we searched for signatures of these hypothesized processes and found that following experience of a visual error, there was an adaptive change in the motor commands of the subsequent saccade. Surprisingly, this adaptation was not uniformly expressed throughout the movement. Rather, after experience of a single error, the adaptive response in the subsequent trial was limited to the deceleration period. After repeated exposure to the same error, the acceleration period commands also adapted, and exhibited resistance to forgetting during set-breaks. In contrast, the deceleration period commands adapted more rapidly, but suffered from poor retention during these same breaks. State-space models suggested that acceleration and deceleration periods were supported by a shared adaptive state which re-aimed the saccade, as well as two separate processes which resembled a two-state model: one that learned slowly and contributed primarily via acceleration period commands, and another that learned rapidly but contributed primarily via deceleration period commands.Simon P OrozcoScott T AlbertReza ShadmehrPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Computational Biology, Vol 17, Iss 7, p e1009176 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Simon P Orozco Scott T Albert Reza Shadmehr Adaptive control of movement deceleration during saccades.
description	As you read this text, your eyes make saccades that guide your fovea from one word to the next. Accuracy of these movements require the brain to monitor and learn from visual errors. A current model suggests that learning is supported by two different adaptive processes, one fast (high error sensitivity, low retention), and the other slow (low error sensitivity, high retention). Here, we searched for signatures of these hypothesized processes and found that following experience of a visual error, there was an adaptive change in the motor commands of the subsequent saccade. Surprisingly, this adaptation was not uniformly expressed throughout the movement. Rather, after experience of a single error, the adaptive response in the subsequent trial was limited to the deceleration period. After repeated exposure to the same error, the acceleration period commands also adapted, and exhibited resistance to forgetting during set-breaks. In contrast, the deceleration period commands adapted more rapidly, but suffered from poor retention during these same breaks. State-space models suggested that acceleration and deceleration periods were supported by a shared adaptive state which re-aimed the saccade, as well as two separate processes which resembled a two-state model: one that learned slowly and contributed primarily via acceleration period commands, and another that learned rapidly but contributed primarily via deceleration period commands.
format	article
author	Simon P Orozco Scott T Albert Reza Shadmehr
author_facet	Simon P Orozco Scott T Albert Reza Shadmehr
author_sort	Simon P Orozco
title	Adaptive control of movement deceleration during saccades.
title_short	Adaptive control of movement deceleration during saccades.
title_full	Adaptive control of movement deceleration during saccades.
title_fullStr	Adaptive control of movement deceleration during saccades.
title_full_unstemmed	Adaptive control of movement deceleration during saccades.
title_sort	adaptive control of movement deceleration during saccades.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/133c38599b464667a4b5a2d47f7fe055
work_keys_str_mv	AT simonporozco adaptivecontrolofmovementdecelerationduringsaccades AT scotttalbert adaptivecontrolofmovementdecelerationduringsaccades AT rezashadmehr adaptivecontrolofmovementdecelerationduringsaccades
_version_	1718375825341939712

Adaptive control of movement deceleration during saccades.

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