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Limited Plasticity of Prismatic Visuomotor Adaptation

Movements toward an object displaced optically through prisms adapt quickly, a striking example for the plasticity of neuronal visuomotor programs. We investigated the degree and time course of this system’s plasticity. Participants performed goal-directed throwing or pointing movements with termina...

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Detalles Bibliográficos
Autores principales: Spang, Karoline, Wischhusen, Sven, Fahle, Manfred
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5407531/
https://www.ncbi.nlm.nih.gov/pubmed/28473909
http://dx.doi.org/10.1177/2041669517701458
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author Spang, Karoline
Wischhusen, Sven
Fahle, Manfred
author_facet Spang, Karoline
Wischhusen, Sven
Fahle, Manfred
author_sort Spang, Karoline
collection PubMed
description Movements toward an object displaced optically through prisms adapt quickly, a striking example for the plasticity of neuronal visuomotor programs. We investigated the degree and time course of this system’s plasticity. Participants performed goal-directed throwing or pointing movements with terminal feedback before, during, and after wearing prism goggles shifting the visual world laterally either to the right or to the left. Prism adaptation was incomplete even after 240 throwing movements, still deviating significantly laterally by on average of 0.8° (CI = 0.20°) at the end of the adaptation period. The remaining lateral deviation was significant for pointing movements only with left shifting prisms. In both tasks, removal of the prisms led to an aftereffect which disappeared in the course of further training. This incomplete prism adaptation may be caused by movement variability combined with an adaptive neuronal control system exhibiting a finite capacity for evaluating movement errors.
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spelling pubmed-54075312017-05-04 Limited Plasticity of Prismatic Visuomotor Adaptation Spang, Karoline Wischhusen, Sven Fahle, Manfred Iperception Article Movements toward an object displaced optically through prisms adapt quickly, a striking example for the plasticity of neuronal visuomotor programs. We investigated the degree and time course of this system’s plasticity. Participants performed goal-directed throwing or pointing movements with terminal feedback before, during, and after wearing prism goggles shifting the visual world laterally either to the right or to the left. Prism adaptation was incomplete even after 240 throwing movements, still deviating significantly laterally by on average of 0.8° (CI = 0.20°) at the end of the adaptation period. The remaining lateral deviation was significant for pointing movements only with left shifting prisms. In both tasks, removal of the prisms led to an aftereffect which disappeared in the course of further training. This incomplete prism adaptation may be caused by movement variability combined with an adaptive neuronal control system exhibiting a finite capacity for evaluating movement errors. SAGE Publications 2017-04-10 /pmc/articles/PMC5407531/ /pubmed/28473909 http://dx.doi.org/10.1177/2041669517701458 Text en © The Author(s) 2017 http://creativecommons.org/licenses/by/3.0/ This article is distributed under the terms of the Creative Commons Attribution 3.0 License (http://www.creativecommons.org/licenses/by/3.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Article
Spang, Karoline
Wischhusen, Sven
Fahle, Manfred
Limited Plasticity of Prismatic Visuomotor Adaptation
title Limited Plasticity of Prismatic Visuomotor Adaptation
title_full Limited Plasticity of Prismatic Visuomotor Adaptation
title_fullStr Limited Plasticity of Prismatic Visuomotor Adaptation
title_full_unstemmed Limited Plasticity of Prismatic Visuomotor Adaptation
title_short Limited Plasticity of Prismatic Visuomotor Adaptation
title_sort limited plasticity of prismatic visuomotor adaptation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5407531/
https://www.ncbi.nlm.nih.gov/pubmed/28473909
http://dx.doi.org/10.1177/2041669517701458
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