Perceval, Garon, Martin, Andrew K., Copland, David A., Laine, Matti, Meinzer, Marcus (2017) High-definition tDCS of the temporo-parietal cortex enhances access to newly learned words. Scientific Reports, 7 (1). Article Number 17023. ISSN 2045-2322. (doi:10.1038/s41598-017-17279-0) (KAR id:79700)
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Official URL: https://doi.org/10.1038/s41598-017-17279-0 |
Abstract
Learning associations between words and their referents is crucial for language learning in the developing and adult brain and for language re-learning after neurological injury. Non-invasive transcranial direct current stimulation (tDCS) to the posterior temporo-parietal cortex has been suggested to enhance this process. However, previous studies employed standard tDCS set-ups that induce diffuse current flow in the brain, preventing the attribution of stimulation effects to the target region. This study employed high-definition tDCS (HD-tDCS) that allowed the current flow to be constrained to the temporo-parietal cortex, to clarify its role in novel word learning. In a sham-controlled, double-blind, between-subjects design, 50 healthy adults learned associations between legal non-words and unfamiliar object pictures. Participants were stratified by baseline learning ability on a short version of the learning paradigm and pairwise randomized to active (20 mins; N = 25) or sham (40 seconds; N = 25) HD-tDCS. Accuracy was comparable during the baseline and experimental phases in both HD-tDCS conditions. However, active HD-tDCS resulted in faster retrieval of correct word-picture pairs. Our findings corroborate the critical role of the temporo-parietal cortex in novel word learning, which has implications for current theories of language acquisition.
Item Type: | Article |
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DOI/Identification number: | 10.1038/s41598-017-17279-0 |
Uncontrolled keywords: | adult; clinical article; clinical trial; controlled study; double blind procedure; female; human; information retrieval; language; learning; male; parietal cortex; randomized controlled trial; transcranial direct current stimulation; visually impaired person; brain; hemispheric dominance; parietal lobe; physiology; procedures; verbal learning; young adult, Adult; Brain; Double-Blind Method; Female; Functional Laterality; Humans; Male; Parietal Lobe; Transcranial Direct Current Stimulation; Verbal Learning; Young Adult |
Divisions: | Divisions > Division of Human and Social Sciences > School of Psychology |
Depositing User: | Andrew Martin |
Date Deposited: | 04 Feb 2020 13:13 UTC |
Last Modified: | 06 Mar 2023 12:27 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/79700 (The current URI for this page, for reference purposes) |
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