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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: J Neural Eng. 2015 Jun 10;12(4):046016. doi: 10.1088/1741-2560/12/4/046016

Figure 3.

Figure 3

Time frequency decomposition using short time Fourier Transform averaged over micro-electrode channels of M1 (left) and M2 (right) as a ratio with respect to total spectral power in 70–110 Hz, of the 4 patients P1–P4. The time interval for each patient shown here is the same as that considered for the propagation analysis. This figure gives the reader a sense of the distribution of spectral power in the 70 – 110 Hz band and the rationale behind choosing a frequency sub-band for estimating propagation. As indicated by a red horizontal line, P1 and P4 show a higher spectral power concentration in the 70–90 and 70–100 Hz ranges respectively while P2 and P3 have similar spectral power over the entire range.