Table 3.

Definition of regions of interest (ROIs).

	Size in voxels	XYZ (MNI coordinates)
		Left	Right
M1 (primary motor cortex)	324	−40 −29 59	36 25 56
S1 (primary somatosensory cortex)	486	−52 −29 56	44 –29 56
S2 (secondary somatosensory cortex)	162	−41 20 13	47 –23 14
Putamen	485	−24 4 4	26 3 4
Pallidum	162	−20 −6 −1	15 –4 −1
Caudate ncl.	385	−16 4 14	13 5 14
Thalamus	324	−16 −23 −4	14 −21 −4
Subthalamic ncl.	38	−3 −20 −12	8 −18 −12
Occipital cortex	500	−24 −94 8	32 −91 8

We included the primary and secondary somatosensory cortex (S1 and S2) and the primary motor cortex (M1) along with the BG and the thalamus. The table provides the final size of each ROI in voxels within the coregistered and normalized structural T1 image. MNI coordinates are given for the left and right hemispheres of each ROI.