Table 1.

Mean values of DTI and DMI parameters were achieved with the global tracking approach (cf. 2.5, 2.6) averaged in the tract defined regions and are reported. Bold segments comprise the majority of the percentage MFB projection. All ADC values are given in μm²/s, FA and intra/extra-axonal fractions are given in parts per thousands. Further, percentages of fibers reaching specific subcortical WM targets are given relative to all frontal projections. Note that, the percentages do not sum up to 100%, because the sub-bundles are not fully disjoint due to streamlines at the boundaries of the cortical parcells.

Cortical region (Deskian/Killiany)	FA	axial ADC	mean ADC	radial ADC	extra axonal	intra axonal	% of frontal projection
Right
Superiorfrontal	354	923	799	549	376	451	38%
Rostralmiddlefrontal	341	921	802	564	386	437	35%
Lateralorbitofrontal	342	941	821	581	382	433	24%
Parstriangularis	365	938	810	557	367	451	15%
Parsorbitalis	362	942	816	565	371	445	11%
Parsopercularis	414	917	776	496	354	479	2%
Medialorbitofrontal	377	942	811	548	374	447	5%
Pars caudalis (of middlefrontal gyrus)	422	908	766	479	347	489	1%
Left
Superiorfrontal	351	939	815	566	379	439	31%
Rostralmiddlefrontal	342	933	812	571	382	438	35%
Lateralorbitofrontal	333	953	834	597	381	427	32%
Parstriangularis	363	950	823	569	364	449	16%
Parsorbitalis	364	954	827	572	369	443	8%
Parsopercularis	405	949	810	531	348	475	3%
Medialorbitofrontal	356	960	833	580	377	433	7%
Pars caudalis (of middlefrontal gyrus)	421	928	784	496	336	500	2%
Full MFB (r)	322	919	805	577	396	427	28,489 SL
Frontal projections (r)	325	917	802	572	395	430	79% of full
Full MFB (l)	319	927	814	587	397	421	27,393 SL
Frontal projections (l)	322	926	812	583	396	423	83% of full