Table 2. Brain areas with significantly different BOLD responses in the second level using an independent t-test design for the contrast turning>walking in the virtual reality task, showing the PD+FOG>PD−NF peak voxel statistics.

Brain area	x	y	z	# voxels	T-value	Z-value	P-value
L—SMA—Premotor	−21	−7	64	59	−4.17	3.54	<0.001
L—Parietal superior	−30	−46	58	57	−3.91	3.37	<0.001
L—Inferior frontal	−30	35	13	35	3.58	3.14	<0.002
R—Inferior frontal	36	20	25	20	4.04	3.46	<0.001

Abbreviations: BOLD, blood oxygen level-dependent; L—SMA, left supplementary motor area; PD+FOG, Parkinson’s disease patients with freezing of gait; PD−NF, Parkinson’s disease patients without freezing of gait; R, right.

k>20, P<0.005, uncorrected with coordinates in MNI space.