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. 2017 Oct 25;37(43):10421–10437. doi: 10.1523/JNEUROSCI.0447-17.2017

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Copyright © 2017 Bourguignon et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License Creative Commons Attribution 4.0 International, which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.

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Figure 4. — Coupling between cortical signals and the periphery. A, Left to right, Individual coherence between MEG_SM1 and EMG signals (Coh_EMG) with ±2.5 Hz smoothing (one trace per subject; n = 17), corresponding group-average source map at ∼20 Hz, and EMG amplitude spectra. The EMG signals were high-pass filtered at 10 Hz (green vertical line). B, Same as A with EMG replaced by force. Red line indicates the noise level of the force signals. C, Same as B but with ±0.3 Hz spectral smoothing and group-average source maps computed at 0.5–3 Hz. D, Directional coupling between MEG_SM1 and force quantified with rPDC.