Differential influences of unilateral tDCS over the intraparietal cortex on numerical cognition

Frontiers in Human Neuroscience
Christina ArtemenkoElise Klein

Abstract

Recent neuro-imaging research identified the bilateral intraparietal sulcus (IPS) to be a key area associated with number processing. However, causal structure-function relationships are hard to evaluate from neuro-imaging techniques such as fMRI. Nevertheless, brain stimulation methods like transcranial direct current stimulation (tDCS) allow for investigating the functional relevance of the IPS for number processing. Following up on a study using bilateral bi-cephalic tDCS over the IPS, the current study aimed at evaluating the differential lateralized functional contributions of the left and right IPS to number processing using unilateral bi-cephalic tDCS over either the left or right IPS. Results indicated a right lateralization for the processing of the place-value structure of the Arabic number system. Importantly, the processing of number magnitude information was not affected by unilateral IPS corroborating the assumption that number magnitude is processed in the bilateral IPS. Taken together, these data suggest that even though number magnitude is represented bilaterally, the left and right IPS seem to contribute differentially to numerical cognition with respect to the processing of specific other aspects of numerical...Continue Reading

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Citations

May 15, 2015·The European Journal of Neuroscience·Roland H GrabnerTobias U Hauser
Jun 23, 2016·Journal of Cognitive Neuroscience·Philipp Alexander SchroederChristian Plewnia
Mar 12, 2018·Brain Structure & Function·Christina ArtemenkoHans-Christoph Nuerk
Apr 21, 2018·Frontiers in Neuroscience·Silke M BieckElise Klein
Jan 24, 2020·Cognitive Processing·Gabriella DaroczyHans-Christoph Nürk

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Software Mentioned

R package lmerTest
R R Development Core Team

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