T1W images | T2W images |
---|---|
1 month | |
PLIC, optic radiation, central CS, | Posterior 1/3 PLIC, |
optic nerve, cerebellar peduncles, | central CS, dorsal pons, |
dorsal pons, vermis, | peridental WM, vermis |
dentate nucleus | |
2 months | |
Pre- and postcentral sulcus WM, | PLIC 1/3, CS, optic radiation, |
ALIC, anterior pons, | middle cerebellar peduncles, |
hippocampus | dentate nuclei |
3 months | |
ALIC complete, | 1/2 PLIC |
occipital WM at calcarine fissure, | |
splenium of corpus callosum | |
4 months | |
Beginning of frontal WM | Calcarine WM |
5 months | |
Genu of corpus callosum | Anterior pons |
6 months | |
Branching of frontal WM | PLIC complete, ALIC beginning, |
splenium of corpus callosum | |
7 months | |
Branching of occipital WM | Optic radiation complete |
8 months | |
Peripheral frontal WM, | ALIC complete, |
fine arborization of paracentral and | genu of corpus callosum |
occipital WM | |
10 months | ALIC thick, |
arborization of central motor tracts, | |
branching of occipital tracts | |
11–12 months | |
Temporal WM | Branching of posterior parietal tracts, |
beginning of frontal tracts | |
15–18 months | Frontal arborization, |
Subcortical WM, U fibers | beginning of temporal WM |
24 months | Temporal arborization, |
subcortical WM, U fibers |
Distribution of myelin seen on MR images from term to 2 years
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