Table 1.

A. Group level localization of activity to gray matter (GM) and white matter (WM)
Lateral Shoulder
Contrast	% GM Activated	% WM Activated	% GM/% WM
L	15.5	10.4	1.50
R	31.6	22.7	1.39
L > R	13.3	7.8	1.71
R > L	34.8	24.9	1.40
Dorsal Third Digit
Contrast	% GM Activated	% WM Activated	% GM/% WM
L	12.8	8.7	1.46
R	8.4	7.0	1.20
L > R	10.2	8.7	1.17
R > L	20.2	17.1	1.18

B. Subject level localization of activity to GM and WM
Lateral Shoulder
Contrast	Number of subjects with % GM/% WM > 1	Median	IQR	Z-score	P-value
L	10	0.973	0.201	−1.000	0.317
R	11	0.970	0.248	−0.229	0.819
L > R	14	1.009	0.312	0.314	0.753
R > L	7	0.859	0.233	−1.829	0.067
Dorsal Third Digit
Contrast	Number of subjects with % GM/% WM > 1	Median	IQR	Z-score	P-value
L	14	1.041	0.299	0.371	0.710
R	11	0.988	0.263	0.629	0.530
L > R	9	0.929	0.294	−0.286	0.775
R > L	16	1.043	0.278	1.571	0.116

L = left, R = right, D = dorsal, V = ventral, IQR = interquartile range.