학술논문
tDCS effects in basic symbolic number magnitude processing are not significantly lateralized.
Document Type
Academic Journal
Author
Bahreini N; Department of Psychology, University of Tuebingen, Tuebingen, Germany. narjes.bahreini@uni-tuebingen.de.; Artemenko C; Department of Psychology, University of Tuebingen, Tuebingen, Germany.; Plewnia C; Department of Psychiatry and Psychotherapy, Neurophysiology and Interventional Neuropsychiatry, University Hospital of Tuebingen, Tuebingen, Germany.; German Centre for Mental Health (DZPG), Jena, Germany.; Nuerk HC; Department of Psychology, University of Tuebingen, Tuebingen, Germany.; German Centre for Mental Health (DZPG), Jena, Germany.
Source
Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: MEDLINE
Subject
Language
English
Abstract
Functional lateralization was previously established for various cognitive domains-but not for number processing. Although numbers are considered to be bilaterally represented in the intraparietal sulcus (IPS), there are some indications of different functional roles of the left vs. right IPS in processing number pairs with small vs. large distance, respectively. This raises the question whether number size plays a distinct role in the lateralization within the IPS. In our preregistered study, we applied anodal transcranial direct current stimulation (tDCS) over the left vs. right IPS to investigate the effect of stimulation as compared to sham on small vs. large distance, in both single-digit and two-digit number comparison. We expected that anodal tDCS over the left IPS facilitates number comparison with small distance, while anodal tDCS over the right IPS facilitates number comparison with large distance. Results indicated no effect of stimulation; however, exploratory analyses revealed that tDCS over the right IPS slowed down single-digit number processing after controlling for the training effect. In conclusion, number magnitude processing might be bilaterally represented in the IPS, however, our exploratory analyses emphasise the need for further investigation on functional lateralization of number processing.
(© 2023. The Author(s).)
(© 2023. The Author(s).)