Figure 5.

Independent firing among spatially separated GPi tremor-related activities. (A and B) Power spectra of multiunit activity that displayed kinesthetic responses to flexion and extension of the ankle (A) and elbow (B). The spectral peak at 3 Hz in A is not statistically significant. (C) Power spectrum of the biceps EMG. (D) Coherence spectrum between the ankle and elbow units. (E) Coherence spectrum between the ankle units and the biceps EMG. (F) Coherence spectrum between the elbow units and the biceps EMG.