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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: J Neurosci. 2012 Aug 1;32(31):10541–10553. doi: 10.1523/JNEUROSCI.0767-12.2012

Figure 9.

Figure 9

Directionality of M1-STN coupling.

Coherence and nonparametric Granger causality were computed for individual hemispheres (the data were combined across conditions). This analysis was done for two 1 s windows: baseline, −6 to −5 s, and movement, −0.5 to +0.5 s relatively to the button press. Note that in the baseline period coherence is present in the beta band with the predominant direction being from M1 to STN, whereas in the movement period coherence is present in the gamma band with the predominant direction being from STN to M1. In both cases there is clear correspondence between coherence and Granger causality results.