Figure 8.

Spatial specificity of spectral attenuation. (A) Schematic of electrode array. Power spectral densities with 95% confidence limits before (black) and during (red) 2.5 V DBS within the STN for each ECoG bipolar pair for (B) case 4R, (C) case 6R, and (D) case 8R. Cortical electrode #3 was placed over the efferent projection site of the hyperdirect pathway for both case 4R and case 6R. For case 8R, the patient's ECoG strip ended up ~11 mM lateral to the target, in a non-specific area of motor cortex. Four out of five bipolar pairs for this patient demonstrated no spectral modulation during STN HF DBS. The spectrograms for this case are shown in Figures A2.