LIVING ART ENTERPRISES, LLC / SCIENCE PHOTO LIBRARY LIVING ART ENTERPRISES, LLC / SCIENCE PHOTO LIBRARY
This composite of 4 axial T1 weighted MRI images of a newborn shows a normal pattern of myelination. The general progression of myelination in infants is from inferior to superior, central to peripheral and posterior to anterior. Immature myelinated regions of the brain have less fat and more water content therefore on T1 weighted images the immature regions of myelination look darker and brighter on T2 weighted images. A relatively normal adult pattern of myelination is acheived by about 18 months of age.
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