Fig. 2.

Peri-movement beta ERD and PMBR for patients with Parkinson's disease who exhibited left-dominant and right-dominant symptomatology. Group mean beamformer images (pseudo-t) of beta activity are shown for both the left-dominant (LD; left) and right-dominant (RD; right) patient groups. Peak voxels are denoted with a yellow dot. The top panel shows mean images of the a) right hand beta ERD and b) left hand beta ERD, while the bottom panel shows mean images of the c) right hand PMBR and d) left hand PMBR for each group. Patients in each group showed strong beta responses in the bilateral primary motor cortices, although activity was of noticeably lower power in the RD patient group compared to the LD patient group. As can be discerned, left hand movements generated higher-amplitude beta responses compared to right hand movements. Axial slices are shown in radiologic convention (right = left).