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. 2014 Oct 16;8:817. doi: 10.3389/fnhum.2014.00817

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Copyright © 2014 Smith, Weaver, Grabowski, Rao and Darvas.

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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Z-score group average maps of beta band activity (15–35 Hz) of all subjects (n = 10). Activity was mapped in Montreal Neurological Institute (MNI) space. (A) Averaged beta activity during left hand motor imagery. (B) Averaged beta activity during right hand motor imagery. The threshold for the group average was set at Z = 0.72, corresponding to 2.3 in a normal distribution or a 99% confidence level.