Table 2.

MNI coordinates and effort

		Coordinates, mm
Region	Nearest Brodmann Areas	x	y	z	Z	No. of Voxels	P
Contrast: GripLE > GripHE
Putamen	N/A	−27	+8	+4	4.04	51	0.01 (corr.)
Putamen	N/A	−21	+20	−2	3.81
Primary somatosensory cortex	1	−57	−19	+43	3.64	13	0.0001 (unc.)
Primary motor cortex	4p	−33	−19	+49	3.60	32	0.0001 (unc.)
Primary somatosensory cortex	3b	−42	−25	+49	3.32	32	0.0001 (unc.)
Cingulate motor area	23, 24	+12	−28	+46	3.51	6	0.0001 (unc.)
Supplementary motor area	6, 4a	+3	−16	+55	3.31	8	0.0001 (unc.)
Supramarginal gyrus	7, 40	−51	−40	+34	3.61	12	0.0001 (unc.)
Supramarginal gyrus	7, 40	−45	−43	+28	3.34		0.0001 (unc.)
Middle temporal gyrus	39	−57	−52	+19	3.36	8	0.0001 (unc.)
Contrast: HoldHE > HoldLE
Mid-brain	N/A	+9	−25	−8	3.57	7	0.0001 (unc.)
Putamen	N/A	−33	−13	−5	3.39	5
Middle Temporal Gyrus	37	+60	−34	−8	3.32	6
Contrast: Persistence × HoldLE
Anterior cingulate cortex	24	+3	+26	+25	3.70	11	0.0001 (unc.)
Posterior part of Middle Temporal gyrus	19	+51	−76	+13	3.40	8	0.0001 (unc.)

MNI coordinates of regions the activity of which is correlated with effort (thresholded at P = 0.001, uncorrected > voxels). unc, uncorrected.