Table 4.

Table of peak ages (in years) for each MR parameters in the 14 cerebral white matter ROIs investigated. NS indicates that the quadratic effect of age, age², was not significant, while NA indicates that the calculated peak age was outside of the sample age range.

	MWF	FA	MD	RD	AxD
Whole Brain	43.76	30.86	33.40	32.28	35.84
Frontal	42.34	NA	30.68	28.98	34.20
Occipital	48.58	40.07	31.48	32.09	29.91
Parietal	43.34	30.27	27.92	27.24	29.69
Temporal	44.83	30.35	36.55	35.48	39.37
Cerebellum	46.34	51.32	51.01	50.84	51.71
Corpus Callosum	40.51	NA	NA	NA	32.58
Internal Capsule	41.41	47.77	43.32	43.07	43.98
Cerebral Peduncle	51.70	NS	34.27	26.24	44.18
Corona Radiata	40.16	29.76	32.48	31.58	34.55
Thalamic Radiation	37.84	35.84	35.46	35.48	35.51
Fronto Occipital Fasciculus	40.88	40.12	36.23	37.26	34.47
Longitudinal Fasciculus	42.21	NS	38.32	36.59	43.09
Forceps	41.86	28.18	33.26	31.85	38.60