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. 2014 Jan 16;7:928. doi: 10.3389/fnhum.2013.00928

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Copyright © 2014 Krause, Wach, Südmeyer, Ferrea, Schnitzler and Pollok.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Upper panel: Mean relative changes of beta band cortico-muscular coupling (CMC) amplitude during isometric contraction in PD patients and healthy control subjects following 20 Hz tACS (mean ± SEM), lower panel: Individual relative changes of beta band CMC amplitude in 10 PD patients following 20 Hz tACS. (B) Relative changes of amplitude variation during fast finger tapping following 20 Hz tACS in PD patients and healthy control subjects. Patients performed the tasks with the more severely affected forearm, control subjects were matched, respectively. Asterisk indicates p < 0.05, two asterisks indicate p < 0.01.