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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/17126

Title: Changes in Corticomotor Excitability and Intracortical Inhibition of the Primary Motor Cortex Forearm Area Induced by Anodal tDCS
Authors: Zhang, Xue
Woolley, Daniel G.
Swinnen, Stephan P.
Feys, Hilde
MEESEN, Raf
Wenderoth, Nicole
Issue Date: 2014
Citation: PLOS ONE, 9 (7)
Abstract: Objective: Previous studies have investigated how tDCS over the primary motor cortex modulates excitability in the intrinsic hand muscles. Here, we tested if tDCS changes corticomotor excitability and/or cortical inhibition when measured in the extensor carpi radialis (ECR) and if these aftereffects can be successfully assessed during controlled muscle contraction. Methods: We implemented a double blind cross-over design in which participants (n = 16) completed two sessions where the aftereffects of 20 min of 1 mA (0.04 mA/cm(2)) anodal vs sham tDCS were tested in a resting muscle, and two more sessions where the aftereffects of anodal vs sham tDCS were tested in an active muscle. Results: Anodal tDCS increased corticomotor excitability in ECR when aftereffects were measured with a low-level controlled muscle contraction. Furthermore, anodal tDCS decreased short interval intracortical inhibition but only when measured at rest and after non-responders (n = 2) were removed. We found no changes in the cortical silent period. Conclusion: These findings suggest that targeting more proximal muscles in the upper limb with anodal tDCS is achievable and corticomotor excitability can be assessed in the presence of a low-level controlled contraction of the target muscle.
Notes: Wenderoth, N (reprint author), Katholieke Univ Leuven, Dept Kinesiol, Motor Control Lab, Movement Control & Neuroplast Res Grp, Leuven, Belgium.nicole.wenderoth@hest.ethz.ch
URI: http://hdl.handle.net/1942/17126
DOI: 10.1371/journal.pone.0101496
ISI #: 000338637300050
ISSN: 1932-6203
Category: A1
Type: Journal Contribution
Validation: ecoom, 2015
Appears in Collections: Research publications

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