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High-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning

Visual perceptual learning (VPL) refers to the improvement in visual perceptual abilities through training and has potential implications for clinical populations. However, improvements in perceptual learning often require hundreds or thousands of trials over weeks to months to attain, limiting its...

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Autores principales: Wu, Di, Wang, Yifan, Liu, Na, Wang, Panhui, Sun, Kewei, Xiao, Wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9474993/
https://www.ncbi.nlm.nih.gov/pubmed/36117616
http://dx.doi.org/10.3389/fnins.2022.988590
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author Wu, Di
Wang, Yifan
Liu, Na
Wang, Panhui
Sun, Kewei
Xiao, Wei
author_facet Wu, Di
Wang, Yifan
Liu, Na
Wang, Panhui
Sun, Kewei
Xiao, Wei
author_sort Wu, Di
collection PubMed
description Visual perceptual learning (VPL) refers to the improvement in visual perceptual abilities through training and has potential implications for clinical populations. However, improvements in perceptual learning often require hundreds or thousands of trials over weeks to months to attain, limiting its practical application. Transcranial direct current stimulation (tDCS) could potentially facilitate perceptual learning, but the results are inconsistent thus far. Thus, this research investigated the effect of tDCS over the left human middle temporal complex (hMT+) on learning to discriminate visual motion direction. Twenty-seven participants were randomly assigned to the anodal, cathodal and sham tDCS groups. Before and after training, the thresholds of motion direction discrimination were assessed in one trained condition and three untrained conditions. Participants were trained over 5 consecutive days while receiving 4 × 1 ring high-definition tDCS (HD-tDCS) over the left hMT+. The results showed that the threshold of motion direction discrimination significantly decreased after training. However, no obvious differences in the indicators of perceptual learning, such as the magnitude of improvement, transfer indexes, and learning curves, were noted among the three groups. The current study did not provide evidence of a beneficial effect of tDCS on VPL. Further research should explore the impact of the learning task characteristics, number of training sessions and the sequence of stimulation.
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spelling pubmed-94749932022-09-16 High-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning Wu, Di Wang, Yifan Liu, Na Wang, Panhui Sun, Kewei Xiao, Wei Front Neurosci Neuroscience Visual perceptual learning (VPL) refers to the improvement in visual perceptual abilities through training and has potential implications for clinical populations. However, improvements in perceptual learning often require hundreds or thousands of trials over weeks to months to attain, limiting its practical application. Transcranial direct current stimulation (tDCS) could potentially facilitate perceptual learning, but the results are inconsistent thus far. Thus, this research investigated the effect of tDCS over the left human middle temporal complex (hMT+) on learning to discriminate visual motion direction. Twenty-seven participants were randomly assigned to the anodal, cathodal and sham tDCS groups. Before and after training, the thresholds of motion direction discrimination were assessed in one trained condition and three untrained conditions. Participants were trained over 5 consecutive days while receiving 4 × 1 ring high-definition tDCS (HD-tDCS) over the left hMT+. The results showed that the threshold of motion direction discrimination significantly decreased after training. However, no obvious differences in the indicators of perceptual learning, such as the magnitude of improvement, transfer indexes, and learning curves, were noted among the three groups. The current study did not provide evidence of a beneficial effect of tDCS on VPL. Further research should explore the impact of the learning task characteristics, number of training sessions and the sequence of stimulation. Frontiers Media S.A. 2022-09-01 /pmc/articles/PMC9474993/ /pubmed/36117616 http://dx.doi.org/10.3389/fnins.2022.988590 Text en Copyright © 2022 Wu, Wang, Liu, Wang, Sun and Xiao. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Neuroscience
Wu, Di
Wang, Yifan
Liu, Na
Wang, Panhui
Sun, Kewei
Xiao, Wei
High-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning
title High-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning
title_full High-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning
title_fullStr High-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning
title_full_unstemmed High-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning
title_short High-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning
title_sort high-definition transcranial direct current stimulation of the left middle temporal complex does not affect visual motion perception learning
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9474993/
https://www.ncbi.nlm.nih.gov/pubmed/36117616
http://dx.doi.org/10.3389/fnins.2022.988590
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