Table 2.

Results for Principle Component Analysis of Whole-Brain R1

	PCs (90%)	PC1		PC2		PC3
		%Var	Regions*	%Var	Regions*	% Var	Regions*
MEDIAN	6	77%	Superior temporal sulcus†	6.4%	Ventricles Corpus Collosum	2.8%	Superior parietal gyrus Superior occipital gyrus
VARIANCE	25	41.6%	Cerebral White Matter, Parieto-occipital, cingulate-marginalis	11%	Cuneus Precuneus Corpus Collosum	4.9%	Cerebellum White Matter Cerebellum Cortex Brainstem
SKEW	49	12.3%	Superior circular insula sulcus Posterior lateral fissure	7.8%	Cerebral White Matter Precentral superior sulcus Postcentral Sulcus	5%	Superior Frontal Gyrus Cerebellum Cortex Temporal Medial Parahip gyrus
10-PERCENTILE	13	72.6%	Parieto-occipital sulcus Temporal Sulcus Cingulate	4.8%	Ventricles Blood Vessels	2.5%	Precentral Gyrus Postcentral Gyrus Cerebellar White Matter
90-PERCENTILE	13	63.8%	Parietal Occipital Sulcus Temporal sulcus Hippocampus	9.6%	Cuneus gyrus Precuneus Gyri Corpus Collosum	3.9%	Ventricles Paracentral gyrus, sulcus Optic Chiasm

^*Regions presented had high weightings in both right and left hemisphere

^†While superior temporal sulcus is the highest weighted, the difference amongst regions varied by less than 1.