Simultaneous processing of information on multiple errors in visuomotor learning.

The proper association between planned and executed movements is crucial for motor learning because the discrepancies between them drive such learning. Our study explored how this association was determined when a single action caused the movements of multiple visual objects. Participants reached to...

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Autores principales:	Shoko Kasuga, Masaya Hirashima, Daichi Nozaki
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2dc9550bd87a48f18fd91725a7532432
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id	oai:doaj.org-article:2dc9550bd87a48f18fd91725a7532432
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spelling	oai:doaj.org-article:2dc9550bd87a48f18fd91725a75324322021-11-18T08:57:44ZSimultaneous processing of information on multiple errors in visuomotor learning.1932-620310.1371/journal.pone.0072741https://doaj.org/article/2dc9550bd87a48f18fd91725a75324322013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24009702/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The proper association between planned and executed movements is crucial for motor learning because the discrepancies between them drive such learning. Our study explored how this association was determined when a single action caused the movements of multiple visual objects. Participants reached toward a target by moving a cursor, which represented the right hand's position. Once every five to six normal trials, we interleaved either of two kinds of visual perturbation trials: rotation of the cursor by a certain amount (±15°, ±30°, and ±45°) around the starting position (single-cursor condition) or rotation of two cursors by different angles (+15° and -45°, 0° and 30°, etc.) that were presented simultaneously (double-cursor condition). We evaluated the aftereffects of each condition in the subsequent trial. The error sensitivity (ratio of the aftereffect to the imposed visual rotation) in the single-cursor trials decayed with the amount of rotation, indicating that the motor learning system relied to a greater extent on smaller errors. In the double-cursor trials, we obtained a coefficient that represented the degree to which each of the visual rotations contributed to the aftereffects based on the assumption that the observed aftereffects were a result of the weighted summation of the influences of the imposed visual rotations. The decaying pattern according to the amount of rotation was maintained in the coefficient of each imposed visual rotation in the double-cursor trials, but the value was reduced to approximately 40% of the corresponding error sensitivity in the single-cursor trials. We also found a further reduction of the coefficients when three distinct cursors were presented (e.g., -15°, 15°, and 30°). These results indicated that the motor learning system utilized multiple sources of visual error information simultaneously to correct subsequent movement and that a certain averaging mechanism might be at work in the utilization process.Shoko KasugaMasaya HirashimaDaichi NozakiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 8, p e72741 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shoko Kasuga Masaya Hirashima Daichi Nozaki Simultaneous processing of information on multiple errors in visuomotor learning.
description	The proper association between planned and executed movements is crucial for motor learning because the discrepancies between them drive such learning. Our study explored how this association was determined when a single action caused the movements of multiple visual objects. Participants reached toward a target by moving a cursor, which represented the right hand's position. Once every five to six normal trials, we interleaved either of two kinds of visual perturbation trials: rotation of the cursor by a certain amount (±15°, ±30°, and ±45°) around the starting position (single-cursor condition) or rotation of two cursors by different angles (+15° and -45°, 0° and 30°, etc.) that were presented simultaneously (double-cursor condition). We evaluated the aftereffects of each condition in the subsequent trial. The error sensitivity (ratio of the aftereffect to the imposed visual rotation) in the single-cursor trials decayed with the amount of rotation, indicating that the motor learning system relied to a greater extent on smaller errors. In the double-cursor trials, we obtained a coefficient that represented the degree to which each of the visual rotations contributed to the aftereffects based on the assumption that the observed aftereffects were a result of the weighted summation of the influences of the imposed visual rotations. The decaying pattern according to the amount of rotation was maintained in the coefficient of each imposed visual rotation in the double-cursor trials, but the value was reduced to approximately 40% of the corresponding error sensitivity in the single-cursor trials. We also found a further reduction of the coefficients when three distinct cursors were presented (e.g., -15°, 15°, and 30°). These results indicated that the motor learning system utilized multiple sources of visual error information simultaneously to correct subsequent movement and that a certain averaging mechanism might be at work in the utilization process.
format	article
author	Shoko Kasuga Masaya Hirashima Daichi Nozaki
author_facet	Shoko Kasuga Masaya Hirashima Daichi Nozaki
author_sort	Shoko Kasuga
title	Simultaneous processing of information on multiple errors in visuomotor learning.
title_short	Simultaneous processing of information on multiple errors in visuomotor learning.
title_full	Simultaneous processing of information on multiple errors in visuomotor learning.
title_fullStr	Simultaneous processing of information on multiple errors in visuomotor learning.
title_full_unstemmed	Simultaneous processing of information on multiple errors in visuomotor learning.
title_sort	simultaneous processing of information on multiple errors in visuomotor learning.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/2dc9550bd87a48f18fd91725a7532432
work_keys_str_mv	AT shokokasuga simultaneousprocessingofinformationonmultipleerrorsinvisuomotorlearning AT masayahirashima simultaneousprocessingofinformationonmultipleerrorsinvisuomotorlearning AT daichinozaki simultaneousprocessingofinformationonmultipleerrorsinvisuomotorlearning
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Simultaneous processing of information on multiple errors in visuomotor learning.

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