TABLE 1

Regional Values of Kcplx (Normalized to Standard Plasma Total LNAA Concentration)

ROI	All	Women	Men	P
Visual cortex	0.0176 (22)	0.0189 (18)	0.0154 (23)	0.08
Brain stem	0.0165 (24)	0.0175 (22)	0.0148 (23)	0.18
Cerebellum	0.0161 (23)	0.0172 (21)	0.0143 (25)	0.13
Thalamus	0.0151 (23)	0.0160 (22)	0.0136 (24)	0.20
Frontal cortex	0.0140 (20)	0.0147 (19)	0.0128 (21)	0.20
White matter	0.0085 (23)	0.0088 (25)	0.0079 (16)	0.34
Whole brain	0.0131 (23)	0.0138 (22)	0.0119 (24)	0.21

Data, in mL/g/min, were determined from all subjects in whom total plasma LNAA concentrations were determined (6 men and 10 women). Values in parentheses represent coefficient of variation (SD/mean × 100) determined from all subjects. P value indicates significance of sex difference.