Effectiveness of a combined transcranial direct current stimulation and virtual reality-based intervention on upper limb function in chronic individuals post-stroke with persistent severe hemiparesis: a randomized controlled trial

Abstract Background Functional impairments derived from the non-use of severely affected upper limb after stroke have been proposed to be mitigated by action observation and imagination-based techniques, whose effectiveness is enhanced when combined with transcranial direct current stimulation (tDCS...

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Main Authors: Roberto Llorens, María Antonia Fuentes, Adrián Borrego, Jorge Latorre, Mariano Alcañiz, Carolina Colomer, Enrique Noé
Format: Article
Language:English
Published: BMC 2021-07-01
Series:Journal of NeuroEngineering and Rehabilitation
Subjects:
Online Access:https://doi.org/10.1186/s12984-021-00896-2
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author Roberto Llorens
María Antonia Fuentes
Adrián Borrego
Jorge Latorre
Mariano Alcañiz
Carolina Colomer
Enrique Noé
author_facet Roberto Llorens
María Antonia Fuentes
Adrián Borrego
Jorge Latorre
Mariano Alcañiz
Carolina Colomer
Enrique Noé
author_sort Roberto Llorens
collection DOAJ
description Abstract Background Functional impairments derived from the non-use of severely affected upper limb after stroke have been proposed to be mitigated by action observation and imagination-based techniques, whose effectiveness is enhanced when combined with transcranial direct current stimulation (tDCS). Preliminary studies in mildly impaired individuals in the acute phase post-stroke show intensified effects when action is facilitated by tDCS and mediated by virtual reality (VR) but the effectiveness in cases of severe impairment and chronic stroke is unknown. This study investigated the effectiveness of a combined tDCS and VR-based intervention in the sensorimotor function of chronic individuals post-stroke with persistent severe hemiparesis compared to conventional physical therapy. Methods Twenty-nine participants were randomized into an experimental group, who received 30 minutes of the combined tDCS and VR-based therapy and 30 minutes of conventional physical therapy, or a control group, who exclusively received conventional physical therapy focusing on passive and active assistive range of motion exercises. The sensorimotor function of all participants was assessed before and after 25 one-hour sessions, administered three to five times a week, using the upper extremity subscale of the Fugl-Meyer Assessment, the time and ability subscales of the Wolf Motor Function Test, and the Nottingham Sensory Assessment. Results A clinically meaningful improvement of the upper limb motor function was consistently revealed in all motor measures after the experimental intervention, but not after conventional physical therapy. Similar limited effects were detected in the sensory function in both groups. Conclusion The combined tDCS and VR-based paradigm provided not only greater but also clinically meaningful improvement in the motor function (and similar sensory effects) in comparison to conventional physical therapy.
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spelling doaj.art-5b777d8ec87343519e49dc9e67d633ca2022-12-21T22:05:54ZengBMCJournal of NeuroEngineering and Rehabilitation1743-00032021-07-0118111310.1186/s12984-021-00896-2Effectiveness of a combined transcranial direct current stimulation and virtual reality-based intervention on upper limb function in chronic individuals post-stroke with persistent severe hemiparesis: a randomized controlled trialRoberto Llorens0María Antonia Fuentes1Adrián Borrego2Jorge Latorre3Mariano Alcañiz4Carolina Colomer5Enrique Noé6Neurorehabilitation and Brain Research Group, Instituto de Investigación e Innovación en Bioingeniería, Universitat Politècnica de ValènciaNEURORHB. Servicio de Neurorrehabilitación de Hospitales Vithas, Fundación Hospitales VithasNeurorehabilitation and Brain Research Group, Instituto de Investigación e Innovación en Bioingeniería, Universitat Politècnica de ValènciaNeurorehabilitation and Brain Research Group, Instituto de Investigación e Innovación en Bioingeniería, Universitat Politècnica de ValènciaNeurorehabilitation and Brain Research Group, Instituto de Investigación e Innovación en Bioingeniería, Universitat Politècnica de ValènciaNEURORHB. Servicio de Neurorrehabilitación de Hospitales Vithas, Fundación Hospitales VithasNEURORHB. Servicio de Neurorrehabilitación de Hospitales Vithas, Fundación Hospitales VithasAbstract Background Functional impairments derived from the non-use of severely affected upper limb after stroke have been proposed to be mitigated by action observation and imagination-based techniques, whose effectiveness is enhanced when combined with transcranial direct current stimulation (tDCS). Preliminary studies in mildly impaired individuals in the acute phase post-stroke show intensified effects when action is facilitated by tDCS and mediated by virtual reality (VR) but the effectiveness in cases of severe impairment and chronic stroke is unknown. This study investigated the effectiveness of a combined tDCS and VR-based intervention in the sensorimotor function of chronic individuals post-stroke with persistent severe hemiparesis compared to conventional physical therapy. Methods Twenty-nine participants were randomized into an experimental group, who received 30 minutes of the combined tDCS and VR-based therapy and 30 minutes of conventional physical therapy, or a control group, who exclusively received conventional physical therapy focusing on passive and active assistive range of motion exercises. The sensorimotor function of all participants was assessed before and after 25 one-hour sessions, administered three to five times a week, using the upper extremity subscale of the Fugl-Meyer Assessment, the time and ability subscales of the Wolf Motor Function Test, and the Nottingham Sensory Assessment. Results A clinically meaningful improvement of the upper limb motor function was consistently revealed in all motor measures after the experimental intervention, but not after conventional physical therapy. Similar limited effects were detected in the sensory function in both groups. Conclusion The combined tDCS and VR-based paradigm provided not only greater but also clinically meaningful improvement in the motor function (and similar sensory effects) in comparison to conventional physical therapy.https://doi.org/10.1186/s12984-021-00896-2Transcranial direct current stimulationVirtual realityEye-trackingSurface electromyographyHemiparesisStroke
spellingShingle Roberto Llorens
María Antonia Fuentes
Adrián Borrego
Jorge Latorre
Mariano Alcañiz
Carolina Colomer
Enrique Noé
Effectiveness of a combined transcranial direct current stimulation and virtual reality-based intervention on upper limb function in chronic individuals post-stroke with persistent severe hemiparesis: a randomized controlled trial
Journal of NeuroEngineering and Rehabilitation
Transcranial direct current stimulation
Virtual reality
Eye-tracking
Surface electromyography
Hemiparesis
Stroke
title Effectiveness of a combined transcranial direct current stimulation and virtual reality-based intervention on upper limb function in chronic individuals post-stroke with persistent severe hemiparesis: a randomized controlled trial
title_full Effectiveness of a combined transcranial direct current stimulation and virtual reality-based intervention on upper limb function in chronic individuals post-stroke with persistent severe hemiparesis: a randomized controlled trial
title_fullStr Effectiveness of a combined transcranial direct current stimulation and virtual reality-based intervention on upper limb function in chronic individuals post-stroke with persistent severe hemiparesis: a randomized controlled trial
title_full_unstemmed Effectiveness of a combined transcranial direct current stimulation and virtual reality-based intervention on upper limb function in chronic individuals post-stroke with persistent severe hemiparesis: a randomized controlled trial
title_short Effectiveness of a combined transcranial direct current stimulation and virtual reality-based intervention on upper limb function in chronic individuals post-stroke with persistent severe hemiparesis: a randomized controlled trial
title_sort effectiveness of a combined transcranial direct current stimulation and virtual reality based intervention on upper limb function in chronic individuals post stroke with persistent severe hemiparesis a randomized controlled trial
topic Transcranial direct current stimulation
Virtual reality
Eye-tracking
Surface electromyography
Hemiparesis
Stroke
url https://doi.org/10.1186/s12984-021-00896-2
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