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Article

Beyond Reading Modulation: Temporo-Parietal tDCS Alters Visuo-Spatial Attention and Motion Perception in Dyslexia

1
Child and Adolescent Psychiatry Unit, Department of Neuroscience, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy
2
Department of Human Science, LUMSA University of Rome, 00193 Rome, Italy
3
Department of Human and Social Science, University of Bergamo, 24129 Bergamo, Italy
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Department of General Psychology, University of Padova, 35131 Padova, Italy
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School of Psychology, University “Vita-Salute San Raffaele”, 20132 Milano, Italy
6
Department of Life Sciences and Public Health, Catholic University of the Sacred Heart, 00168 Rome, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Randi Starrfelt
Brain Sci. 2021, 11(2), 263; https://doi.org/10.3390/brainsci11020263
Received: 11 December 2020 / Revised: 13 February 2021 / Accepted: 16 February 2021 / Published: 19 February 2021
(This article belongs to the Special Issue Multiple Neurocognitive Deficits and Dyslexia)
Dyslexia is a neurodevelopmental disorder with an atypical activation of posterior left-hemisphere brain reading networks (i.e., temporo-occipital and temporo-parietal regions) and multiple neuropsychological deficits. Transcranial direct current stimulation (tDCS) is a tool for manipulating neural activity and, in turn, neurocognitive processes. While studies have demonstrated the significant effects of tDCS on reading, neurocognitive changes beyond reading modulation have been poorly investigated. The present study aimed at examining whether tDCS on temporo-parietal regions affected not only reading, but also phonological skills, visuo-spatial working memory, visuo-spatial attention, and motion perception in a polarity-dependent way. In a within-subjects design, ten children and adolescents with dyslexia performed reading and neuropsychological tasks after 20 min of exposure to Left Anodal/Right Cathodal (LA/RC) and Right Anodal/Left Cathodal (RA/LC) tDCS. LA/RC tDCS compared to RA/LC tDCS improved text accuracy, word recognition speed, motion perception, and modified attentional focusing in our group of children and adolescents with dyslexia. Changes in text reading accuracy and word recognition speed—after LA/RC tDCS compared to RA/LC—were related to changes in motion perception and in visuo-spatial working memory, respectively. Our findings demonstrated that reading and domain-general neurocognitive functions in a group of children and adolescents with dyslexia change following tDCS and that they are polarity-dependent. View Full-Text
Keywords: neuromodulation; brain reading networks; magnocellular-dorsal pathway; attention; neural noise; cortical excitability; children and adolescents neuromodulation; brain reading networks; magnocellular-dorsal pathway; attention; neural noise; cortical excitability; children and adolescents
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MDPI and ACS Style

Lazzaro, G.; Bertoni, S.; Menghini, D.; Costanzo, F.; Franceschini, S.; Varuzza, C.; Ronconi, L.; Battisti, A.; Gori, S.; Facoetti, A.; Vicari, S. Beyond Reading Modulation: Temporo-Parietal tDCS Alters Visuo-Spatial Attention and Motion Perception in Dyslexia. Brain Sci. 2021, 11, 263. https://doi.org/10.3390/brainsci11020263

AMA Style

Lazzaro G, Bertoni S, Menghini D, Costanzo F, Franceschini S, Varuzza C, Ronconi L, Battisti A, Gori S, Facoetti A, Vicari S. Beyond Reading Modulation: Temporo-Parietal tDCS Alters Visuo-Spatial Attention and Motion Perception in Dyslexia. Brain Sciences. 2021; 11(2):263. https://doi.org/10.3390/brainsci11020263

Chicago/Turabian Style

Lazzaro, Giulia, Sara Bertoni, Deny Menghini, Floriana Costanzo, Sandro Franceschini, Cristiana Varuzza, Luca Ronconi, Andrea Battisti, Simone Gori, Andrea Facoetti, and Stefano Vicari. 2021. "Beyond Reading Modulation: Temporo-Parietal tDCS Alters Visuo-Spatial Attention and Motion Perception in Dyslexia" Brain Sciences 11, no. 2: 263. https://doi.org/10.3390/brainsci11020263

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