Table 2.

Matrix of pairwise linear correlation coefficients (and corresponding p-values) for FA between the white matter tracts of interest.

	DLPFC-Caudate	Caudate-IFG	IFG-SMA	SMA-STN	Caudate-STN	IFG-STN
DLPFC-Caudate	1	0.8843 (0.0003)	0.5703 (0.0670)	0.5598 (0.0733)	0.3972 (0.2265)	0.4866 (0.1290)
Caudate-IFG	0.8843 (0.0003)	1	0.6536 (0.0292)	0.4583 (0.1563)	0.4152 (0.2042)	0.3711 (0.2612)
IFG-SMA	0.5703 (0.0670)	0.6536 (0.0292)	1	0.8249 (0.0018)	0.7933 (0.0036)	0.6330 (0.0366)
SMA-STN	0.5598 (0.0733)	0.4583 (0.1563)	0.8249 (0.0018)	1	0.7481 (0.0081)	0.6700 (0.0241)
Caudate-STN	0.3972 (0.2265)	0.4152 (0.2041)	0.7933 (0.0036)	0.7481 (0.0081)	1	0.8046 (0.0028)
IFG-STN	0.4866 (0.1290)	0.3711 (0.2612)	0.6330 (0.0366)	0.6700 (0.0241)	0.8046 (0.0028)	1

FA, fractional anisotropy; DLPFC, dorsolateral prefrontal cortex; IFG, inferior frontal gyrus; SMA, supplementary motor area; STN, subthalamic nucleus.