TABLE 1:

Timing parameters from the myelination model

Region	Onset (months)		TC (months)		Maturation Age (months)
Region	18q−	Control	18q−	Control	18q−	Control
FWM	6.7 ± 0.54	1.8 ± 1.03	16.3 ± 2.54	10.3 ± 0.30	71.9 ± 10.17	43.2 ± 1.59
SWM	3.6 ± 0.94	0.8 ± 0.16	12.4 ± 0.95	6.3 ± 0.75	53.2 ± 3.93	26.0 ± 3.02
PWM	3.7 ± 1.75	1.9 ± 0.25	12.7 ± 3.59	8.2 ± 0.93	54.5 ± 14.40	34.7 ± 3.74
Genu	2.6 ± 1.10	1.9 ± 0.51	13.1 ± 0.57	5.4 ± 0.27	55.0 ± 2.54	23.5 ± 1.18
Splenium	3.1 ± 0.45	2.3 ± 0.11	8.1 ± 2.44	2.4 ± 0.47	35.5 ± 9.77	11.9 ± 1.90
MCBP	−4.9 ± 0.49	−3.9 ± 0.60	12.1 ± 2.87	4.1 ± 0.47	43.5 ± 11.50	12.5 ± 1.97

Note.—TC is the time constant for myelination model; maturation age, Age when myelin development reaches about 98% of the equilibrium level (onset + 4TC). All SDs estimated by using propagation of errors from Bevington et al (24).